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Energy Storage - Science topic

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Hello, I am starting my PhD in energy storage devices. I want to learn about the use of DFT in battery technology. Please suggest any course or video lecture (for a beginner ).
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I am looking for examples of using home energy storage to reduce energy peaks on a daily basis in the case of PV. There is a need to use many home energy storage (several hundred thousand in Poland) to cut PV energy peaks.
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I searched through many types of literature and planned something based on my investigation.
I plan to predict the IV characteristic curve based on experimental data. Since the curve is usually not linear, I plan to use the SVM algorithm for it.
I plan to predict the power output of fuel cell systems/battery technology as well. Since a lot of factors influence the output power, I am considering using the ANN algorithm to predict the power output with at least 30 epochs.
My ultimate objective is to create a digital twin of a fuel cell system. I was wondering if the algorithms I was planning to use would make sense given the sort of experimental data I would have. Will you also recommend another machine learning algorithm that you believe is more feasible?
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May be alexnet
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Integrating the BESS next to a wind farm to address the wind energy forecast errors.
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look at this paper: DOI: 10.17775/CSEEJPES.2021.00230
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Theoretical capacity is about 120mAh/g.
I'm attaching the GCD profile for the reference.
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I believe the capacity lost can be attributed to the interfacial reactions including the formation of SEI layer and other side reactions. About the concern of the initial formation capacity of above the theoretical value of 120 mAh/g, did you check the structure of your polyanionic cathode?
What was your initial cell OCV? I guess you started with a Na(TM)PO4 or Na(TM)SO4 polyanionic cathode material against sodium metal counter electrode? From the graph I see that the initial OCV is 2.2 V. Did you check for the crystal data to verify your polyanionic structure? Could you elaborate your question if possible?
These papers could be of help,
10.1039/c8ra09154d
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Please tell me advantages of MOFs over other nanomaterials.
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Dear all, it is mainly for the high porosity and ease of preparation and modulation. Please have a look at the following free access document. My Regards
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I started working on 2D hybrid materials to develop energy storage devices. I want to know the working principle/methodology of such materials.
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For carbon materials Electric double layer is the principle. For xides and polymers redox reactions.
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In a battery energy storage system, if we know the number of cycles i.e. charging and discharging how do we calculate the degradation from this.
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Well, I just meant that there is no straight forward formula to just plug the inputs and derive the outputs for capacity degradation. That is what I meant by 'No formula'. Of course, you can always build an ECM or semi-empirical models to calculate the non-linear behavior of batteries to calculate the capacity loss, not to mention the complexity of resistance increase coupled with capacity fade and the quantification of cyclic and calendar degradation.
All I meant was, there is no simple answer for capacity degradation number. In real life we can't measure the capacity difference after certain number of cycles by just charging/ discharging (RPT). No BMS is capable of doing it. We rely on look up table and equation based algorithm and that's where the models come into picture.
About the normalization of the capacity, I was just giving a simple example assuming the question is simple about the calculation of capacity loss in a typical charge/discharge test for a certain number of cycles.
Thank you for your comment though.
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Hello everyone, I am looking for a good MPC quadratic optimization mathematical model to optimize a cost function or performance index, for a battery energy storage state space model. Would anybody suggest a good research paper or post a formulation that contains a good mathematical model for quadratic optimization? An objective function with viable constraints, which can be possible to implement in function solvers such as quadprog or cplex would be ideal. Thank you
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Doesn’t Wind Require Energy Storage In Order To Work?
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Also check please the following useful RG link:
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There are two methods of MXene synthesis from MAX phase via direct HF method and also LiF+HCl. however, i am confused, for energy storage which route is suitable for high yield and why? Your answer will be highly appreciate. Thank you
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The role of LiF+HCl or HF is to etch out the Aluminium layer from the MAX phase. Equivalent yield is obtained in either way.
We are also studying the use of MXene in energy storage devices. We synthesized MXene via LiF+HCl etching process and obtained a good yield.
Hope this would help you, sir.
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For a certain storage device, if round-trip efficiency equals 80%, what are charge efficiency and discharge efficiency?
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Round-trip efficiency is the percentage of electricity put into storage that is later retrieved. The higher the round-trip efficiency, the less energy is lost in the storage process. Typically it is fixed at 80% or 90%. However, Lithium-ion batteries have the highest round-trip efficiency.
The charge and discharge efficiencies are the efficiencies (losses) at a particular instant of the charge and discharge cycle with a certain amount of storage level. These efficiencies vary according to the storage level, charged power, discharged power, and type of storage at each instant in a charge and discharge cycle.
Therefore, their percentage represents a fixed round-trip efficiency.
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Hello all,
For a study about an energy storage system for an offshore platform, we need a load profile or a power consumption curve of the platform (i.e. required power or power consumption vs time). I found something useful but it is data a land-based oil rig and the data is for 3 days which makes the figure difficult to extract the data (in the attachment).
Many thanks in advance.
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Hi Ameen Bassam , the norwegiean sector of the north see has a policy of open data access, hoping you can the type of data you look for. All the best wishes.
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why discharge time is obviously shorter than the charge time for most of the supercapacitors? What is the phenomenon behind this?
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The main point of departure (for q-losses) in the supercapacitors is the overestimation in potential window(s) of electrolytes' (analytical) stability, for a certain case of useful/practical WE-CE. There are other, minor, self discharge issues (electrolytes' impurities, aging, etc.), also.
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Hi All,
I am trying to link a composite model which is a control model for Battery Energy Storage System (BESS) to a PWM Converter/1 DC-Connection as shown in the attachment.
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Hi there :)
I am having the same problem and I am also stuck with my research progress. I am using the Digsilent Template for the BESS Frame to build my composite frames. When I want to select the PWM converter in the composite frame of the controller, I can't select it. The following message pups up, but I don't know how to come around.
Could please tell me how you solved it?
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Control strategy for battery energy storage system to smooth wind power output.
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Keep an eye on the cylce life of the battery
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Unfortunately, this simplistic vision of RF and microwave circuit design often becomes blurred when test results are obtained that differ drastically from the beautiful simulation results. The reasons for this disparity may normally be traced to one of the following:
"The ratio of the transverse dimensions of transmission lines to wave length are nonnegligible thus, additional unwanted energy storage modes become available."
I read this above paragraph in a textbook, and didn't quite understand the sentence given in bold.
As of how does the above condition result in unwanted energy storage modes.
Thank you in advance
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As one example (I think)
Microwave waveguides are usually used in the regime where the widest width of the waveguide is less than a free-space wavelength, and more than a free-space half wavelength. This means that there is only one way, or mode, in which the signal can travel down the guide. If the guide is wider than this it becomes possible for energy to travel down it in multiple modes with different velocities, and, even if only one mode is launched, other modes can be generated at bends and other components.
Even in the usual regime, the signal (group) velocity depends on frequency.
Also, at things like steps in the waveguide walls, modes can be generated even when the guide is less than a wavelength across. In the case of the guide being less than a wavelength across, these do not propagate but store energy similar to inductance or capacitance, and the stored energy may be larger for larger guide sizes.
All of these result in more complicated behaviour than a simple ideal transmission line, and happen because the time taken for the signal to travel between opposite conductors is not minute compared to the time taken for the signal to reverse in the transmission line.
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For electrochemical energy storage devices, if battery is considered to specially design for high energy and supercapacitor is considered to specially design for high power, then how to design a device specially for high safety from scratch to adress the safety issues?
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Toma Stankulov Syed Shaheen Shah Agree & many thanks. But it is just one better than the other. Is it possible to design a "absolutely safe" one to address the safety issue? It means absolutely safe, rather than just much safer. Furthermore, the device should be not only "absolutely safe", but also "reliable" which means the performances remains after extreme conditions such as fire temperatures.
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Hello . I am a master student in renewable energy and e-mobility and I have an idea to write my thesis on liquid air energy storage but I do not know on what I will be focusing on. Can you please help me to find an area of research on this topic. Thanks
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Dear, Erika. The most daunting dilemma with liquid air energy storage is actually gaining a better understand of a plant's operating expenses of preventive measures repairs and eventual overhauls. This is since there are n't many analogies to those certain technologies; "the concern is properly and effectively evaluating expenses to ensure that it needs to continue to make profit." Taking this into account, you can oversee a techno-economic analysis of the context you stated, which should not be however curtailed to giving valuable measures to tackle the corresponding setbacks.
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I am looking for a scientific explanation for the mass balancing equation (eq. 1) used in supercapacitors.
1. How the mass balancing could be decided before preparing the electrodes?
2. In which scenario is it required to use the mass balancing and why?
The mass balancing equation:
m+/m- =(C-×∆V-)/(C+×∆V+) (eq. 1)
where m+ and m− is the mass of active material in positive and negative electrodes, C+ and C−is the specific capacitance of the positive and negative electrodes, ΔV+ and ΔV−is the potential window of the positive and negative electrodes.
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I now understand how the mechanism works. This was a great conversation with you. Thank you very much for your explanation.
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I am starting to learn how to model an energy storage system for a wind farm. Would anybody know where to look for already existing program model optimizations in Matlab, Gurobi, Gams, ....ect. This is basically just so I can get a general feel of how it is going to work. Any suggestions will be appreciated.
Regards,
Giovanni Ponce
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Looks like there are many resources available to you Ian William Gibson , these are just a few examples:
Dugan, R.C., Taylor, J.A. and Montenegro, D., 2016, May. Energy storage modeling for distribution planning. In 2016 IEEE Rural Electric Power Conference (REPC) (pp. 12-20). IEEE.
Sparacino, A.R., Reed, G.F., Kerestes, R.J., Grainger, B.M. and Smith, Z.T., 2012, July. Survey of battery energy storage systems and modeling techniques. In 2012 IEEE Power and Energy Society General Meeting (pp. 1-8). IEEE.
Jiang, Z. and Yu, X., 2009, July. Modeling and control of an integrated wind power generation and energy storage system. In 2009 IEEE Power & Energy Society General Meeting (pp. 1-8). IEEE.
Ma, Z., Pesaran, A., Gevorgian, V., Gwinner, D. and Kramer, W., 2015. Energy storage, renewable power generation, and the grid: NREL capabilities help to develop and test energy-storage technologies. IEEE Electrification Magazine, 3(3), pp.30-40.
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I want to conduct a quantitative techno-economic comparison of different energy storage technologies, how to obtain their up-to-date cost parameters, such as the investment cost and O&M cost of batteries, hydraulic pump and turbine, fuel cells...?
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Yi He Dear, you can get some ideas from the link below, as their work seems to be similiar to yours:
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Power Network Expansion Planning is the problem of deciding the new transmission lines that should be added to an existing transmission network in order to satisfy system objectives efficiently. It is one of the main strategic decisions in power systems and has a deep, long-lasting impact on the operation of the system. Several challenges such as deregulation, renewable penetration, large-scale generation projects, market integration, and regional planning are discussed in the literature to some extent.
In the context of the smart grid, what can be the potential future challenges in terms of different scenarios, applications, modeling, solution, and novel devices in the network?
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Two main problems in the perspective of SG:
*Integration of Microgrid, while considering uncertain factors and limitations of the present grid.
*Integration of charging stations for EVs taking into view users' profiles and traditional grid capacity.
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I want to model an energy storage system that with given data levels power consumption. Where should I start looking to learn on how to create one? And most importantly, what would be the best optimization software to use for modeling my problem? Matlab optimization tools, GAMS or Gurobi? Any suggestions would be appreciated
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@Michael Short @Kehinde M. Adeleke. Thank you, for your suggestions. My problem now would be, what optimization software would be the best for modeling an energy storage system, for example following mixed integer linear programming. I am little bit more familiar with Matlab as that is all I have learned, but it would be good to know if GAMS or other programming softwares would be helpful.
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Can we store the electrical energy produced by PEM fuel cells? Maybe stack of them. If so, how do you design the energy storage using a battery or something?
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Dear Fariz Maulana, When used as an energy storage device, the fuel cell is combined with a fuel generation device, commonly an electrolyzer, to create a Regenerative Fuel Cell (RFC) system, which can convert electrical energy to a storable fuel and then use this fuel in a fuel cell reaction to provide electricity when needed.
There still are myriad fuel sorts that can be utilised for energy storage (gas, oil, bio - fuels), however these fuels are n't seem invariably ideal for various applications due to volumetric necessities, storage span intensity, or the amount of energy that must be transported. Non-fuel energy storage, such like batteries, has a wide array of political influence capacities (1 kW to 1 MW); regrettably, the gravimetric energy density is limited, and energy cannot be stored in batteries for long periods. As a result, alternative techniques of energy storage are pertinent for distinct applications.
The RFC is evolving rapidly continue providing high power and high storage abilities at a substantial portion of the cost of traditional lead–acid batteries, and it may acquire economic potential ahead of time than many PEM fuel cell architectures that necessitate reformed hydrocarbons. This is directly attributable to the low cost and widespread provision of medium pressure hydrogen storage, recent advances in self-pressuring PEM electrolyzers, and the growing trend of the both primary and reversible PEM fuel cell stacks and systems. Two of the three major components of the RFC, the PEM electrolyzer and hydrogen storage, are now available commercially, and the third, the fuel cell or reversible cell, is quickly progressing. The storage of hydrogen in moderate pressure tanks is cost-effective, and besides tank size is a bottleneck; it is appropriate for distant location or industrial uses. The expansion of both high pressure power generation and low pressure solid phase storage in hydrides or carbon will increase acceptance and use.
Hope you might find the answer useful, thanks and best wishes 🙂
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Hi all
What is the maximum power capacity of a supercapacitor (eg 112V, 8F, rint = 64 mohm)? Is there any connection between the Ragone plot of different energy storage devices and maximum power handling capacity? If possible, share some references.
Thanks in advance
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yes, a supercapacitor has connection with Ragone chart as well. please refer to these for reference.
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i'd really appreciate if anyone could point me to any resource where i could learn to model this block.
I want to test an energy management algorithm via simulink with solver in phasor form.
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Please i need a material or textbook that explains about hybrid energy storage (battery & Supercapacitor) and their energy management?
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Good answer by Xuhua Wang
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As an electrical researcher, which journal would you choose as your preferred journal for publishing your research, if possible?
This selection includes a maximum of three journals (in order of preference) and the selection criteria can be based on any of the trends (power system, power electronic, smart grid, etc.).
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IEEE!
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Hello everyone,
I'm looking to buy some carbon fiber cloth to use as substrate for binder-free, standalone S cathodes. Previously I used activated carbon cloth manufactured by Kynol. However, the fibers of their carbon cloth are too thick and the pores are almost all unorganized micropores.
My PI told me he recently read some commercialized CNT/graphene organized micro/meso-porous carbon cloth. I have not found it but would really appreciate if anyone can provide such vendors and/or more details. Thank you.
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Hi Yang,
You may make an inquiry at Alfa Chemistry, they offer kinds of good-quality materials.
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The energy storage can be done with different technologies, e.g. batteries, concrete towers, pump hydro systems, flywheel, etc. How long these technologies can hold the energy stored, it is hours, days, weeks, months?
For example, once the energy is charged in the batteries, this gets fully charged, if we leave the batteries fully charged how long will the batteries stay charged, and what are the losses associated with this?
Similarly for the other energy storage technologies, how long this energy storage tile would be?
There are some methods to estimate these characteristics or recommended sources of information?
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Different energy storage systems (ESS) have different capacities for holding the energy between the charge and discharge periods... Despite the mechanical methods of ESS (e.g. pump hydro, bouyancy, etc.), thermochemical ESS demonstrate lower potentials in preserving the energy for longer periods. But, the point is that in most cases, the aim of using ESS is load leveling/shifting and peak shaving and it leads to daily charging and discharging processes. Besides the higher values of RTE and a constant performance during the lifespan of the system, one the most prominent points about these technologies is the number of charge/discharge cycles which can be conducted by them. By and large, I think there are some viable technologies like CAES and LAES which would take the lead in the future of ESS.
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i am currently doing masters in Electrical engineering. as i am new in research so i dont know much about software and how to read and apply a base paper. i am currently studying BESS , their allocation and different approaches. i have read " Category-Based Multiobjective Approach for Optimal Integration of Distributed Generation and Energy Storage Systems in Distribution Networks" and i want to take this as my base paper for research. but i didn't got much from it as i am not clear about the algorithm and planning and programming used in it. can any one help me on this or help me getting its programming or contacting to its authors.?
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Hello Muhammad,
Based on the information in your question, I assume you are investigating BESS in general, or is there a specific application you are considering?
Certain battery technologies are preffered over others depending on the application. My suggestion would be to start with investigating the different types of battery technologies on the market, and if you are targeting a specific application, the battery technologies that are commonly used for that application. A good starting point for information is Original Equipment Manufacturer (OEM) websites and their application notes and technical literature. Thereafter, you can progress into the more targeted research papers/articles found in journals etc.
Best wishes with your research,
Sagadevan
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In the electrochemical energy storage field, more precicely the battery field, what would be the best use for "insertion" and "intercalation"? either speaking about the materials themselves or the actual process. Thanks for sharing your thoughts!
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Dear Julio César Espinosa-Angeles thanks for sharing this interesting technical question with other RG members. For some potentially useful information, please have a look at the following links:
How Does Intercalation Work in Batteries?
and
Lithium Intercalation Materials for Battery Prepared by Sol-Gel Method
Good luck with your work and best wishes!
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From a technical point of view, although lithium electric energy storage is in the limelight at present, it may be impacted by more emerging energy storage routes due to its lack of safety. What kind of route is the most consistent with the development of national energy storage? There is no doubt that safety is the primary consideration. VRFB without explosion and fire hazard is expected to become the preferred technology for large-scale energy storage.VRFB is a kind of battery with the same distinct advantages and disadvantages. It is not difficult to find through detailed comparison that VRFB is the most suitable for energy storage equipment, and it is not too much to say that it is born for energy storage. In terms of market share, the market penetration rate of VRFB is less than 1%. However, in the next few years, VRFB is expected to usher in the outbreak, and the market optimism is expected to reach 20% by 2025, and it will reach 30% in 2030.
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Although the cost of VRFB is high at present, compared with the historical trend of lithium battery price, the rate of VRFBwill probably drop sharply with the scale and volume.
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At present, vanadium redox flow batteries are mainly applied to large-scale energy storage and provide a solution for power smoothing of solar renewable energy. With the proposal of the dual carbon goal, in order to expand its application fields, smart grid, zero-carbon community and other applications have emerged. I would like to ask how vanadium liquid flow battery is applied in the field of new energy vehicles and whether there are any application cases at present.
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Dear all, VFRB applications date to the 70th by USA NASA. One Fraunhofer Institute in Germany have also such a battery. Developpements are touching the performance, efficiency, safety, and recyclability. Following are some interesting documents. My Regards
DOI: 10.5772/intechopen.85166
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Hi everybody, to give a little bit of context, I'm looking into the use of hydrogen for long term energy storage.
I'm reading a lot about using hydrogen turbines for re-generation of electricity. From my understanding fuel cells have a way better efficiency than hydrogen turbines. (fuel cell = ~60-70% efficiency vs. hydrogen turbine = ~30-40% efficiency)
Now what I can think of why using hydrogen turbines instead of fuel cells is because you can reach a higher temperature for CHP. But that's just a guess and I couldn't find a really good explanation yet.
Would be happy if anyone can recommend a good paper or anything which explains why using a hydrogen turbine instead a fuel cell.
Thank you!
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In my opinion, hydrogen combustion offers three advantages:
- lower hydrogen quality required (epecially important if the H2 is stored in underground salt caverns or similar storage facilities)
- lower investment costs and demand for rare or expensive materials
- higher rated power available
However, I have not found any appropriate publications to support my opinion yet. I would be very interested in a paper or study regarding this questions as well!
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I'm modelling my own grid in matpower to calculate the optimal power flow (opf). The thing is my grid has WT, PV & storage system in them along with the conventional generators.Does anyone know how to include the Energy Storage System in the code? And how can I include the charging and the discharging?
Thank you,
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Hello gentlemen,
I would use the Matpower Optimal Scheduling Tool.
Regards
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I am fabricating activated carbon from biowaste like peanut shell for supercapacitor applications. Literature shows that all calcination are doing under inert atmosphere and not normal calcination. We dont have facility to do calcination under inert atmosphere. Will it affects the result if I go for calcination without providing inert atmosphere
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Dear Vishnu Sankar S, yes both processes are used, i.e., with and without an inert atmosphere. Please check the attached file. My Regards
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Please, cyclic voltammetry (CV) and galvanostatic charge-discharge (GCD) values, which one is always higher after calculation.
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Dear Raphael Mmaduka Obodo,
Galvanostatic charge-discharge (GCD) values will give exact results. Read the following article for more information. I hope it may help for the best understanding.
DOI:10.1039/c0ee00074d
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The concrete contains phase change material and thermal couples inserted in the concrete at different thicknesses. The objective of the study is to quantify how much energy the samples can store.
I am using the equations developed by M. Pomerantz, B. Pon, H. Akbari, and S.C. Chang "The Effect of Pavements' Temperatures on Air Temperatures in Large Cities" April 2000
Which is similar to Energy storage (W/m2) = radiation + convection - conduction.
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Dr. Malik Al-Amayreh, Thank you once again for your answers.
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Looking for some collaborations around the energy storage domain. Kindly leave a message if interested or connect me with those intereted. Appreciate it
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Please have look on our(Eminent Biosciences (EMBS)) collaborations.. and let me know if interested to associate with us
Our recent publications In collaborations with industries and academia in India and world wide.
EMBS publication In association with Universidad Tecnológica Metropolitana, Santiago, Chile. Publication Link: https://pubmed.ncbi.nlm.nih.gov/33397265/
EMBS publication In association with Moscow State University , Russia. Publication Link: https://pubmed.ncbi.nlm.nih.gov/32967475/
EMBS publication In association with Icahn Institute of Genomics and Multiscale Biology,, Mount Sinai Health System, Manhattan, NY, USA. Publication Link: https://www.ncbi.nlm.nih.gov/pubmed/29199918
EMBS publication In association with University of Missouri, St. Louis, MO, USA. Publication Link: https://www.ncbi.nlm.nih.gov/pubmed/30457050
EMBS publication In association with Virginia Commonwealth University, Richmond, Virginia, USA. Publication Link: https://www.ncbi.nlm.nih.gov/pubmed/27852211
EMBS publication In association with ICMR- NIN(National Institute of Nutrition), Hyderabad Publication Link: https://www.ncbi.nlm.nih.gov/pubmed/23030611
EMBS publication In association with University of Minnesota Duluth, Duluth MN 55811 USA. Publication Link: https://www.ncbi.nlm.nih.gov/pubmed/27852211
EMBS publication In association with University of Yaounde I, PO Box 812, Yaoundé, Cameroon. Publication Link: https://www.ncbi.nlm.nih.gov/pubmed/30950335
EMBS publication In association with Federal University of Paraíba, João Pessoa, PB, Brazil. Publication Link: https://www.ncbi.nlm.nih.gov/pubmed/30693065
Eminent Biosciences(EMBS) and University of Yaoundé I, Yaoundé, Cameroon. Publication Link: https://pubmed.ncbi.nlm.nih.gov/31210847/
Eminent Biosciences(EMBS) and University of the Basque Country UPV/EHU, 48080, Leioa, Spain. Publication Link: https://www.ncbi.nlm.nih.gov/pubmed/27852204
Eminent Biosciences(EMBS) and King Saud University, Riyadh, Saudi Arabia. Publication Link: http://www.eurekaselect.com/135585
Eminent Biosciences(EMBS) and NIPER , Hyderabad, India. Publication Link: https://www.ncbi.nlm.nih.gov/pubmed/29053759
Eminent Biosciences(EMBS) and Alagappa University, Tamil Nadu, India. Publication Link: https://www.ncbi.nlm.nih.gov/pubmed/30950335
Eminent Biosciences(EMBS) and Jawaharlal Nehru Technological University, Hyderabad , India. Publication Link: https://www.ncbi.nlm.nih.gov/pubmed/28472910
Eminent Biosciences(EMBS) and C.S.I.R – CRISAT, Karaikudi, Tamil Nadu, India. Publication Link: https://www.ncbi.nlm.nih.gov/pubmed/30237676
Eminent Biosciences(EMBS) and Karpagam academy of higher education, Eachinary, Coimbatore , Tamil Nadu, India. Publication Link: https://www.ncbi.nlm.nih.gov/pubmed/30237672
Eminent Biosciences(EMBS) and Ballets Olaeta Kalea, 4, 48014 Bilbao, Bizkaia, Spain. Publication Link: https://www.ncbi.nlm.nih.gov/pubmed/29199918
Eminent Biosciences(EMBS) and Hospital for Genetic Diseases, Osmania University, Hyderabad - 500 016, Telangana, India. Publication Link: https://www.ncbi.nlm.nih.gov/pubmed/28472910
Eminent Biosciences(EMBS) and School of Ocean Science and Technology, Kerala University of Fisheries and Ocean Studies, Panangad-682 506, Cochin, India. Publication Link: https://www.ncbi.nlm.nih.gov/pubmed/27964704
Eminent Biosciences(EMBS) and CODEWEL Nireekshana-ACET, Hyderabad, Publication Link: https://www.ncbi.nlm.nih.gov/pubmed/26770024
Eminent Biosciences(EMBS) and Bharathiyar University, Coimbatore-641046, Tamilnadu, India. Publication Link: https://www.ncbi.nlm.nih.gov/pubmed/27919211
Eminent Biosciences(EMBS) and LPU University, Phagwara, Punjab, India. Publication Link: https://www.ncbi.nlm.nih.gov/pubmed/31030499
Eminent Biosciences(EMBS) and Department of Bioinformatics, Kerala University, Kerala. Publication Link: http://www.eurekaselect.com/135585
Eminent Biosciences(EMBS) and Gandhi Medical College and Osmania Medical College, Hyderabad 500 038, India. Publication Link: https://www.ncbi.nlm.nih.gov/pubmed/27450915
Eminent Biosciences(EMBS) and National College (Affiliated to Bharathidasan University), Tiruchirapalli, 620 001 Tamil Nadu, India. Publication Link: https://www.ncbi.nlm.nih.gov/pubmed/27266485
Eminent Biosciences(EMBS) and University of Calicut - 673635, Kerala, India. Publication Link: https://www.ncbi.nlm.nih.gov/pubmed/23030611
Eminent Biosciences(EMBS) and NIPER, Hyderabad, India. ) Publication Link: https://www.ncbi.nlm.nih.gov/pubmed/29053759
Eminent Biosciences(EMBS) and King George's Medical University, (Erstwhile C.S.M. Medical University), Lucknow-226 003, India. Publication Link: https://www.ncbi.nlm.nih.gov/pubmed/25579575
Eminent Biosciences(EMBS) and School of Chemical & Biotechnology, SASTRA University, Thanjavur, India Publication Link: https://www.ncbi.nlm.nih.gov/pubmed/25579569
Eminent Biosciences(EMBS) and Safi center for scientific research, Malappuram, Kerala, India. Publication Link: https://www.ncbi.nlm.nih.gov/pubmed/30237672
Eminent Biosciences(EMBS) and Dept of Genetics, Osmania University, Hyderabad Publication Link: https://www.ncbi.nlm.nih.gov/pubmed/25248957
EMBS publication In association with Institute of Genetics and Hospital for Genetic Diseases, Osmania University, Hyderabad Publication Link: https://www.ncbi.nlm.nih.gov/pubmed/26229292
Sincerely,
Dr. Anuraj Nayarisseri
Principal Scientist & Director,
Eminent Biosciences.
Mob :+91 97522 95342
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I am trying to implement the thermodynamic model of ejector assisted compressed air energy storage (CAES) and I need thermodynamic properties of Therminol 66 thermal oil. In the reference paper, I am following, the author utilized Refprop 9.1, but I can seems to find the the Fluid "therminol 66" in the Refprop fluid library. Does it have any other name in the Refprop library?. If anyone has any idea please guide.
Thank You
Reference Article:
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Hayder Ibrahim Mohammed Norbert Lümmen Thank you for cooperation, I found the properties using coolProp.
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Hi everyone. I am looking for a high temperature MPCM.
More specifically, I need the thermo physical properties of a microencapsulated phase change material with the melting temperature between 580K to 640K.
Is there any commercial MPCM with the mentioned melting temperature? Or any reliable correlation to calculate the properties of the MPCM?
Thanks
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Hello Amir,
May you find these articles helpful
Microencapsulated phase change materials with high heat capacity and high cyclic durability for high-temperature thermal energy storage and transportation
Types, methods, techniques, and applications for microencapsulated phase change materials (MPCM): a review
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Hello,
i work with a microgrid that contains a battery and a supercapacitor, i want to estimate the SOC of the battery ( modeled by a DC voltage source with an internal resistance ) according to the Coulomb counting method and therefore i need to select the initial SOC of my battery.\
i take the dimension of my battery from a paper where they say that the rated voltage is 48 V and they took the 28 V (as operational or nominal voltage), so since we use it in 28 V and its rated voltage is 48 V can we say that we use it not fully charged at the initial state ?
and how can i fix for ex my initial SOC at a specified value (50,70%..)
thank you in advance
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You have to get the OCV/SOC relationship of the specific battery to correlate Voltage to SOC.
Than you can start with any SOC you want to.
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In general if we want to increase the specific capacitance or charge storage capacity in electrochemical energy storage devices we should have the pore size of the electrode material is slightly higher then the solvated ion size of the electrolyte for easily charging and discharging. If we have the pore size less then the solvated ions of the electrolytes. Can we enhance the parameter if yes How?
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The electric double layer formation of supercapacitors is governed by ion electrosorption at the electrode surface. The double layer is formed, when a charged electrode is placed in an electrolyte, which causes the electrolyte ions to migrate towards the charged surface in order to balance the applied potential.
It is a matter of debate whether pores provide the same contribution to the capacitance regardless of the size, or if subnanometer pores lead to an anomalous increase of capacitance[1].
1. Insights into the influence of the pore size and surface area...capacitor model https://pubs.rsc.org/en/content/articlelanding/2019/cp/c8cp06443a#!divAbstract
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Why are there no reports on polymer electrolytes containing organic salts as ion donors? Are these salts not suitable for energy storage?
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There're many manuscripts about Li polymer electrolyte (including my last publication), but organic salts are rare. May be the major issue for polymer electrolytes containing organic salts is the relative high cost for preferable performance
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In the transportation sector (Electric vehicles), Lithium ion batteries particularly LFP and NMC are the most utilized battery packs today! What are the other expected options within Lithium-ion or other options could be possibly used in the future?
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Dear Muhammad, this is certainly an important technical question of broad general interest to many RG members. As an organometallic chemist I not a proven expert in this field. However, I can recommend to you a potentially useful review article which might help you in your analysis. Please have a look the the following paper entitled:
Li-Ion Batteries: A Review of a Key Technology for Transport Decarbonization
This article has been posted as public full text on RG. Thus it can be freely downloaded as pdf file.
Besides LFP, NMC, and LTO type lithium ion batteries, LMO (lithium manganese oxide, LiMn2O4) and NCA (lithium nickel cobalt aluminium oxide, LiNiCoAlO2) technologies are named here.
Good luck with your work!
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In particular, areas/issues that have potential to be of national/international importance.
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Energy storage...batteries are a very hot topic at the moment (but also thermal energy storage). Smart-grids may attract interest as well. Last but not least...energy management through AI.
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How can I perform charge-discharge measurements on a supercapacitor material in a standard 3 electrode set-up using the Chronocoulometry technique. I am using CHI604D workstation, if that helps. I have come across one article (see link below) that uses this technique for charge-discharge measurements, but the authors have not explained the details of the same. 
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I would like to send this paper about your question.
There is a full guide to evaluate supercapacitors devices without misleading.
If you require any further information, feel free to contact me
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According to literature I have come across, they have stated that for ferroelectric materials, a high Pr value is deemed useful but for energy storage (ferro-capacitors) Pr value should be less. Then what are the other applications where a ferro-material with high Pr can be used.
Kindly help. It's urgent
Thank you
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Then can you elaborate further on your answer?
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I am involved in small project that involves houseload and renewbles like PV , energy storage system & electric vehicle connected to house ! The challenge is to optimize the the load and find the right time for the EV to charge using matlab simulation . what is the best optimization algorithms for such problems involving load and stuff ? Any reference papers SUGGESTING THE SAME would be appreciated .
Thanks !
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Generally, a well-developed meta-heuristic algorithm can be useful. You can start using numerical optimisation methods
Next test the performance of the below methods:
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how does the alkalinity or acidity effect the morphology of the biochar particles derived from biomass conversion via pyrolysis or hydrothermal liquefaction for energy storage applications?
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The pH of biochar has a huge effect on the effectiveness of biochar , since biochar is more like an amendment than a fertilizer source . that is the reason why biochar is so effective on Alfisols , Oxisols and Ultisols compared to Aridisols or Vertisols . Have some reviews consulted , will give fair idea on this very interesting issue, since these days , biochar research is a frontier area of investigation from various angles through multidisciplinary research...
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Because i currently dont find it here (copy from webpage to inform you):
Special Issue Editor
Dr. Johannes Schaffert Website Guest Editor Gas- und Wärme-Institut Essen e.V. (GWI), Hafenstrasse 101, 45356 Essen, Germany Interests: power-to-gas; hydrogen; energy technology; energy science
Special Issue Information
Dear Colleagues,
Most of you—maybe even all of you—share my enthusiasm for hydrogen and power-to-gas technologies as key ingredients for a clean energy supply of the future, I assume.
I also know that all of you have fantastic ongoing or finished projects on specific aspects of the broad topic. Many of the interesting insights you shared with me in the past are still waiting for an opportunity to be recognized by experts around the world, as well as the public.
When Energies contacted me with an invitation to become their Guest Editor in a Special Issue completely dedicated to power-to-gas, I thought about all the results waiting for publication on your and my desks and could not say no. This is how I have come to contact you today with the kind invitation to join me and take the chance to make some noise about power-to-gas-related results from our various research projects.
The title of the Special Issue will be broad to give space for as many interesting pieces of research as possible, no matter how small or detailed they may appear at first glance. We shall invite technical as well as theoretical papers, and all suggestions, regional contexts, and technologies related to hydrogen and power-to-gas are welcome to be suggested by all of you.
I would be pleased to hear from you and wish you all the best, first and foremost good health and a strong mind to overcome the COVID-19 crisis and push forward toward a green energy transition together.
Dr. Johannes Schaffert Guest Editor
Manuscript Submission Information
Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.
Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.
Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2000 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.
Keywords
  • power-to-gas
  • P2G
  • PtG
  • hydrogen
  • H2
  • decarbonization
  • energy transition
  • E-fuels
  • energy conversion
  • energy storage
  • energy system
  • energy technology
Published Papers
This special issue is now open for submission.
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See the attached paper
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I am trying to model a DAB converter and I need to observe the power transfeered to the load side on varying the phase shift between two bridges, hence I couldnt take a constant load e.g resistance.
So i am planning to add a energy storage element e.g battery or something to notice in the change in out voltage and then power delivered.
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there is battery block in matlab.
would you tell me how did you rectify this issue, my guess is it is because I am doing it in open loop thats why its is not controlling the output with respect to input.
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What if we put a Flywheel Energy Storage System between a Renewable Energy Source (Solar, Wind, etc) and an Electric Vehicle Chrager?
Would be possible to really improve charging time by taking advantage of key cababilities like high power density and also the capacity of several charge/discharge cycles?
Please bring your thoughts!! Free-Expression....
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Hi Mr. Vostrov, first of all thanks for your detailed answer! That was a free expression thought looking to improve mass EV adoption within renewables and improved charging time.
You are right the Flywheel itself won´t be able to improve the charging time if the battery still figures as the bottleneck. But if there is a huge power available to be quick discharged as the Flywheel can perform, maybe it would motivate battery technologies be improved as well. That might figure as a shortcut instead of waiting for Grid improvement that hardly rely on Government actions.
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Biochar (solid product with more than 60% carbon as per IBI) has been extensively studied for its production, characterization, and applications. In spite of offering numerous benefits in diverse fields (energy generation, soil, agriculture, water treatment, wildfires, energy storage, and so on), biochar producers are finding it difficult to sustain. Answer to this question may significantly depend on geographical context, so please mention the context while sharing your valuable thoughts. Thank you.
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I think because of different users, for example in wastewater treatment and agriculture. Most agricultural farms required different types of biochars.
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Hello,
I am about writing an essay about energy storage conversion, where I talk about batteries and photovoltaic energy. can anyone give me some help including resources and research papers?
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Dear Abdeljalil,
The paper in this link may be useful to you:
Best wishes
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This is a isothermal process , So I need to If the compression ratio of a reciprocal compressor is 4.5, how many compressors are
needed in series to compress air in the cavern?
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Hi,
For a near Isothermal process: (PR)^n= Pexeit/Pinlet
(4.5)^n=75/1=75, n~3
Three Compressor is optimum for you.
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As the penetration of grid-connected solar energy increases, is it technically possible to replace most of the conventional power generations including coal, gas and natural gas in modern power grid? Is there any critical technical challenges we need to overcome? There are various researches ongoing such as virtual inertial (VI)-based inverter, maximum power point tracking (MPPT) and hybrid energy storage system (ESS) to address voltage/frequency instability, IV & PV non-lineality and solar energy non-availability during night time respectively.
Plus, there are many technologies like artificial intelligence (AI), smart grid, blockchain and other advanced terminologies available for solar energy. From these perspectives, will the solar energy eventually replaces conventional power generation or it will be limited as a supplementary energy source for existing power system which is ideal for remote and vast area?
Welcome to exchange your valuable perspectives on the future of solar energy.
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Please see my road map for the transformation from conventional to PV generation in the paper at the link:
Best wishes
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I work on the energy storage by pumped storage energy transfer stations and I found this equation E (t) = P (t) * t * PF. with E (t) and the energy produced and P (t) and the installed power and t: the operating time of the plant. my question is how calculated PF . AND can we say that PF is the capacity factor of the power plant (pump-turbine) or no . and how is it calculated?
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The power factor is a characteristics of the load. Namely it is the cos phi of the load. So, if the load is composed of a resistor R and a reactance X, then cos phi= R/sqroot (X^2+R^2). If X=0 the cos phi=1 and phi=0 , which means a pure resistive
load.
Then you have to model your load in form of R and X.
Best wishes
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Dear researchers,
I'm studying about manufacturing of Advanced Li-Ion batteries . I'd like have some information about technologies and methods for the production of the battery and its components (Li-Ion in spacial).
For this purpose, I need more and most up-to-date references.
Any suggestion would be appreciated.
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You may refer to these review articles
There're more if you check in "Google Scholar"
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I am working on hydraulic energy storage using pumped-storage turbine energy transfer stations. and I want to calculate friction energy losses using Darcy equation .
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Linear equation but; If the storage head is variable (i.e. during emptying), then the flow will be "Unsteady", and the losses will be exponentially propotional to "V^2" with a curve trend.
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While investigating the state of the art in this field, I kept having this question running in my mind, when authors report photocatalytic performance of water splitting systems. For hydrogen to become a viable pathways for tomorrow's energy management, the standards measurements should include neutral pH and mineralized water. Or can deionization and (e.g.) alkanization be part of a sustainable cycle?
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Thank you Yuri
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Is power-to-gas a possible solution to this issue? Storing renewable energy in the form of H2 and CH4 and using them as fuels can increase the penetration of renewable energy in the transportation sector?
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I agree with Mohammed. In addition, sustainable H2 and CH4 (from renewables) can be stored in the Natural Gas Pipeline network and underground for seasonal balancing of Electricity Demand and Supply. Sustainable H2 and methane can also power heavy duty fuel cell vehicles year-round. When wildfires and other natural disasters crash the grid, or lead to rolling preventive blackouts, the redundancy and security of the underground natural gas pipeline network and storage fields can provide stable energy supplies to distributed fuel cells.
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I am working on hydraulic energy storage using pumped-storage turbine energy transfer stations. and I want to calculate friction energy losses as a function of D1, D2 the diameters of the pipes and L1, L2 the lengths of the pipes to reservoirs 1 and 2 in k(m), and
Roughness coefficient of the materials used for the pipes, Q tank outlet flow rate
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Regards
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I want to share some experience about SMES and also advice from who are working with related projects. I have a simulink model of simple grid connected battery storage system , now i want to replace SMES with battery to find the effects on grid parameters.
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Vincenzo Ascione sure we can share some knowledge. Thanks for your concern.
021mehedi.hasan@gmail.com , here you can directly contact me.
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I have a grid connected 5KW system with 16 panels, with individual panel rating ranging from 36-40 V at 8 A connectedin series give approximately 500-600 V at 8 A. In times of power outage, the Inverter usually supplies power to the load. In absence of a battery unit how do we limit the excess power produced. We thought of using a buck converter to minimize production in such power outage scenarios, but using a buck converter for close to 2KW or 3KW is practically impossible and not cost effective.
I did think of using a voltage reference based power limit control, but the inverter's MPPT is not taking the reference votlage. The inverter in question is a commercial one made by Growatt solutions with an inbuilt MPPT control.
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The grid connected inverters controls the output current from the inverter. So, you need only to set the reference current of the inverter to a smaller value.
For more information about the output power grid connected inverter please refer to paper in the link:
The other solution could be implemented in the design phase where one divide the array into two equal parallel strings. In this way one can connect only one of the two strings to the input of the inverter when the load is reduced.
Best wishes
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I'm a graduate student at McMaster University. Now, I'm doing a system optimization project. I'm interested in optimizing the energy storage system applied to Wolfe Island Windfarm. I'd like to make sure where I can obtain the exact power generated by the wind farm in each hour during the whole year. Also, I need the hourly power prediction (power commitment) data for the next hour.
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Either I am not looking the right way, or there's a lack of adequate research.
I find no shortage of studies conducted on the effect of calendar aging in various temperatures on LFP based Lithium cells. There's thorough material for the effect of high/low rates of charge/discharge on cycle life as well as calendar life as well.
However, save one, or two conference papers, I find comparative comprehensive study on the effect of high/low temperatures charge/discharge on the cycle life of LiFePo4 cell.
Have you come across any such research? Are you currently working on something like this? Have you found the same lack of information? Do you have any extrapolations on what we might expect?
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Hello,
as far as I know, in general, the electrochemical reactions tend to increase (speed up) as temperature increases which leads to faster kinetics and better battery efficiency in one hand. In contrast, the higher the temperature, the higher the ions and particles local movement (resonation) in the materials which can result in an increased internal resistance of the battery. Both fenomena work against each other. There is a quite optimal and realistic temperature range for normal and long-term operation that is somwhere between 10-40°C.
There is a good article about effect of aging on battery parameters, such as capacity degradation etc.
Feng Leng, Cher Ming Tan and Michael Pecht, Effect of Temperature on the Aging, Nature Scientific Reports, 2015, DOI: 10.1038/srep12967
I hope I could help.
Regards,
Bence
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Compressed-air energy storage (CAES) is a way to store energy generated at one time for use at another time using compressed air. At utility scale, energy generated during periods of low energy demand (off-peak) can be released to meet higher-demand (peak load) periods.[1] This is especially important in an age where intermittent renewable-energy sources such as wind and solar power are becoming more prominent energy sources. CAES systems can have a vital impact in making sure that the electricity demands can be met at peak hours.[2] Small-scale systems have long been used in such applications as propulsion of mine locomotives. Large-scale applications must conserve the heat energy associated with compressing air; dissipating heat lowers the energy efficiency of the storage system.
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I think this is because the Huntorf CAES power plant use 70bar as its air storage pressure, and some newly developed CAES system needs a target to compared with so the 70bar is chosen. The air storage pressure can be determined by the air storage tank material, for the carbon steel the pressure can be 100bar.
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Porous media is not absorbing heat by radiation and density remain constant of overall control volume.
We are trying to formulate flow through "solar chimney with porous media as energy storage ".
In fluent we used :
1) k epsilon model
2) DO model for radiation
3) Pressure based model
4) Porous media
For elaborate details of problem refer document attached below .
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You must solve continuity equation, Darcy or modified Darcy equation and Energy Equation
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The solar still equipped with energy storage can work after sunshine hours due to the effect of energy stored in the system.
I want to calculate the instantaneous energy and exergy efficiency after sunshine hours but I am unable to do that as solar radiation is zero after around 6 pm.
I am confused, how to calculate the efficiency of solar still during night hours., As radiation is zero, the efficiency turning undefined because of ZERO in the denominator in the formula.
I have gone through several books and articles, but I am unable to find the exact solution for my query. But there are some articles, calculated and plotted the hourly energy/exergy efficiency after sunshine hours.
It would be of immense help to me if I get a solution... Also, it is very helpful for me in understanding the other related topics towards my research.
Thanks in advance...
Looking forward to hearing from the solar still research family...
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Divide the output energy by the input energy to get the instantaneous energy efficiency
You can notice that it decreases gradually after sunset tell vanishes nearly at mid night or before or after.
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Seasonal factors effect PV generation and thus result less storage availability by PV-battery storage systems, enforcing grid utilisation. Can we put hydrogen energy storage replacing battery storage during low PV generation months ? How can we size the hydrogen based system replacing a PV ?
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It is so that the PV generator is sized according to the lowest possible isolation such that it is capable to cover the load demand. The excess can be converted into hydrogen fuel. And it could be used to derive fuel cells for electricity generation. Specially Germany is adopting such technology and spend intensive research work to commercialize such hydrogen based energy systems.
For more information on this topic please follow the link: https://www.ise.fraunhofer.de/
For sizing you need only to determine the demand and the co version efficiencies from electricity to hydrogen and vice versa through electrolysers and fuel cells.
Best wishes.