Questions related to Photovoltaics
In Brazil and in many other countries, transformers that are directly connected to frequency inverters in applications for renewable energy generation (photovoltaic and wind) tend to have high concentrations of gases (mainly hydrogen, methane and ethane).
I would like to know if there is already a root cause identified or if other engineers are also facing similar situations and have found a solution.
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.
If on top of a standart photovoltaic module there would be a layer of fluorescent particles attached would it get more or less efficient ? On one hand the particle would absorb UV light and emit visible light on the other hand it would of course limit the direct sunlight.
I am interested in any paper addressing the potential environmental effects (positive or negative) of floating photovoltaic systems: in reservoirs, lakes, etc. Any suggestion will be welcome!
Hello everyone, I participate in a project in which we intend to forecast the demand of customers With installed and photovoltaic panels. These are the so-called microinstallations, i.e. their power does not exceed 40 kw. Due to the fact that the distribution system operator installs two-way meters that measure consumption and delivery, we are not able to find out what the customer's auto consumption level is without additional metering. When it comes to forecasting the demand of these customers, usually after the installation of photovoltaics, customers most often decide to install additional receivers so that they can consume the energy produced. Increasingly, these receivers are heat pumps. Thus, the demand of such customers changes dynamically with the change in temperature. To solve this problem, we believe that it will be appropriate to use, for example, linear regression with explanatory variables such as temperature, sunlight, humidity. As for forecasting what customers give to the grid, in this case an efficiency matrix will be built Determining how much energy is given away at a given temperature and sunlight Along with taking into account the Parameters of the sun, i.e. azimuth and Height of the sun. I would like to know what methods do you use to solve this type of task?
How do I make a link between the Photovoltaic thermal PV/T and Multi-effect distillation using Trnsys software?
I'm working on forecasting the photovoltaic power, and I want to classify the day ahead and see if it's a clear day or a cloudy day... For that I need to know wich variables are used for this type of classification ? or maybe the models or any informations..
It will be helpful if anyone knows an article, books...etc
I am calculating Responsivity of a pn junction photodiode by irradiating radiation from LED sources. For this purpose, i have two LEDs, one UV and another green LED.
For UV, manufacturer has given radiant power (~20mW). For Green LED, luminous intensity is given (in mcd). Viewing angle is 120°. Now, i have converted mcd into lumens by considering half of viewing angle as apex angle of a cone. Then, i did convert lumens into watts.
My question is, in literature, authors usually mention intensity in watts/cm^2. I got the values in watts, now how do i get to watts/cm^2? am i suppose to divide the power of LED in watts by the area of the photodiode exposed to radiation from LED? I have also seen some convert like this : "X mcd / m^2 into watts / cm^2.
Please explain how do i get from watts to watts/cm^2
My intention is to quantify the effect of drift Velocity on the photocurrent of a pn junction diode. For this purpose, i have various LED light sources.
While calculating Responsivity, optical power of all the LEDs were kept a constant and as a result, photon density is different for various LEDs.
Now, photocurrent depends on photon density and drift velocity at a specific reverse bias. So, i have kept photon density as a constant, which would mean that the optical powers are now different.
My question is, while calculating Responsivity, does it matter whether i keep optical power as a constant ot photon density as a constant ?
how can I model the carrier generation mechanism from the photovoltaic effect of solar cells by COMSOL, please?
With the application of photovoltaics, what are you most concerned about from the perspective of ecological environment development?(No matter which major you can answer）
I have previously conducted laboratory experiments on a photovoltaic panel under the influence of artificial soiling in order to be able to obtain the short circuit current and the open-circuit voltage data, which I analyzed later using statistical methods to draw a performance coefficient specific to this panel that expresses the percentage of the decrease in the power produced from the panel with the increase of accumulating dust. Are there any similar studies that relied on statistical analysis to measure this dust effect?
I hope I can find researchers interested in this line of research and that we can do joint work together!
I am new in the field photovoltaics, particularly in CdTe based solar cells. I wanted to look into simulation of band bending in solar cells at different operating conditions. I can code in python, i need some directions to do that. Thanks in advacne.
On a global scale, the energy sector is acquiring great dynamism as a result of the notable technological changes that have been taking place in recent decades. This has been motivated by the significant reduction in the cost of renewable energies, such as solar photovoltaic and wind power, and the growing concern caused by climate change, caused by the increase in the concentration of carbon dioxide generated, mainly, by massive use of fossil fuels. In this context and considering aspects such as Distributed Generation, Transactive Energy: What would be possible applications of blockchain technology in the field of energy?
I appreciate your participation in this discussion.
I really need real data of voltage output for completing my research. I would be really appreciate if someone can help me.
Maybe many of you would agree with me that the "Solar Engineering of Thermal Processes, Photovoltaics and Wind" from John A. Duffie et.al. has been paramount in the world of solar thermal. Now I am looking for equivalent books in solar photovoltaic and renewable energy. Any suggestions.
i have read this paper
in the paper, increasing thickness of transport layer decreases Voc. What is the reason(s) and mechanizm of Voc reduction? Is it generally true?
- As we know that energy demands is increasing day by day globally and also to fulfill this demand we are using fossil fuels which are going to impact our atmosphere drastically hence Renewable Resources of energy are promising solution of the above issue and Solar Energy is available in abundant form as we are in Solar belt region using PV we can convert solar energy to electricity but dust accumulation is the major issue with efficiency with Conversion efficiency of Solar PV modules so I would like to work on Synthesis of the Self cleaning Surfaces for that Application.
I want to model a photovoltaic panel with a back plate, back cover, and back sheet. Therefore, I need specific heat capacity(Cp), density, and thermal conductivity of these layers for modeling. I attached the picture of my model to show the layers.
Hello everyone. I am looking for someone who can give me a hand by sharing with me a literature references about the characteristic setup of photovoltaic module. in fact, the objective of this internship is to install a photovoltaic module characterization system in a platform, and to develop the module testing procedures. The analysis of characterization results and performance data of photovoltaic modules will also be performed
I seek help for perovskite UPS analysis for the Valence band and work function calculation. The sample preparation and if there are any critical things?
I have characterized my perovskite layer several times in different architectures; (Glass/Perovskite), (ITO/perovskite), (ITO/PTAA/Perovskite).
My SECO is in the range of 16.87eV but the valence band cut off is always higher (~1.6eV). The perovskite Eg~1.56eV. With these values, the Fermi level is above conduction band. I would appreciate your help in this regard. Thank you.
What is the interpretation for the co-doped SnO2 film, when there is a decrease in intensity and an increase in width at half height of the most intense peak (110) ?.
and is there any work on Ni/Co co-doped SnO2 for photovoltaic or gas sensor application ?.
How many times actually we can recycle the solar panels? Is the recycled one cost less? Does using the recycled one affect its energy absorption efficiency?
Control the MPPT is a precise work to get the fine output of a Photovoltaic Solar Cell, so need the best suggestion about the right algorithm as I had already used PID as well as Fuzzy Logic Controller.
What is the system you have worked with / suggesting to system analyze all photovoltaic and photoconductive characteristics of all types of solar cells?
What is the method of attaching photovoltaic panels by TCT method? Is there a scheme for the aforementioned linkage method?
We synthesize FAPbI3 crystal for photovoltaics applications, but we face the problem of crystal stability.
How the condition is achieved for maximum power operation in solar panels?
Floating photovoltaic or Floating PV (FPV) is a Photovoltaic (PV) based energy generation approach on water surfaces. Usually, it is considered as the third wave of PV module installation after distributed and rooftop solar installations. FPV has several features including
- No need to land
- Higher power performance due to the cooling effect of water
- Higher land-use efficiency (MWh per hectare)
- Better socio-environmental effect (being out of sight)
- Its potentials to meet World Electricity Demand.
- Its combination with hydropower plants (hybridization)
Which one is the most important driver for FPV installation and why?
Building PV modules in desert areas have lits of advantages such as inexpensive land and low-cost PV module which can benefit high irradiation.
However, transmission of power has its own challenges. As far as I researched, making supergrids and HVDC lines are the best options. My questions are:
1) What are economical solution to transmit power for PV plants in desert?
2) What are the risks?
3) What are the benefits?
I am trying to calculate the NOCT data from STC values. All temperature coefficients are available. The calculation for Pmpp is straight forward.
However, I would like to know the equations that I can calculate Vmpp, Impp, Isc and Voc under NOCT conditions from STC values.
Looking forward to your help.
In the case of a photovoltaic cell, minority carrier-lifetime is an important parameter in determining the overall performance. The conventional method, namely time-resolved photoluminescence, is not perceived as a foolproof technique in calculating the above parameter given the high surface recombination, particularly in thin-film (polycrystalline) solar cell. Consequently, many researchers employ the two-photon excitation measurement technique as an alternative.
My enquiry is about the theoretical understanding and methodology of the above procedure.
I am working in perovskite photovoltaic lab. We are fabricating carbon based monolithic perovskite solar cell. The structure of our cell is FTO/c-TiO2/m-TiO2/ZrO2/C and perovskite infiltration. We have fabricated the solar but we are not getting ideal IV curve which also results in low efficiency. How to improve the fill factor and get better IV curve?
I am analysing ground measured solar irradiation data for photovoltaic applications. for some days, I noticed that DNI is higher than GHI. Can someone please explain why?
Consider that there was no flag during these data points. Please see the attached figure. The sun Elevation angle at noon was 45 degree towards South.
Compared with traditional or overland PV systems, the floating PV systems can benefit from the natural cooling effect of water and operate with higher efficiency, since the decrease of the operating temperature of the PV module tends to increase the PV system efficiency. What is the difference in operational temperature between floating PV modules and overland PV modules?
I am working now in the environmental and economic performance of solar cells, focusing in perovskite solar cells.
I am planning using PVGIS to predict the power output from the cell, but I wonder if they are best tools to do that.
Solar Paint technology:- Solar paint, also known as photovoltaic paint, is exactly what it sounds like! It’s a paint that you can apply to any surface that will capture energy from the sun and transform it into electricity. The paint would essentially be your average paint, but with billions of pieces of light-sensitive material suspended in it, material that would transform the typical paint into superpowered energy-capturing paint.
Present I am working on different technologies included in itself and how to develop the infancy to developed stages and what are the implementations and challenges are facing in the future.
The Polygonal Trough Concentrators (PTC) are more suitable for Concentrated Photovoltaic (CPV) applications. Learn how to design the PTCs.
Photovoltaic (PV) solar panels are a known source of reflected polarised light, and as such can serve as ecological traps for insects that rely on laying their eggs in water, historically the main source of such polarised light on Earth and an environmental cue for these species to indicate breeding locations (e.g. Horvath et al. 2010). This effect is increasingly acknowledged in terrestrial ecosystems, but I am curious to learn more about whether this problem has also been investigated for floating solar PV farms on bodies of fresh water? If so, would insects still prefer to display and lay eggs on the solar panels, rather than on the water surface? What might be an acceptable upper limit to area coverage by floating solar PV infrastructure in water supporting rare or endangered insect species? And what might be done to address this problem, bearing in mind the distinctive needs of floating PV farms?
I am investigating an active photovoltaic material using time resolved photoluminescence measurements to find out the carrier lifetime of the material, and hence the diffusion length.
There are many PL peaks in it's spectrally resolved PL. Should I measure the lifetime using the band-to-band emission, or can I measure the lifetime of all the PL peaks (including defect-related PL emissions)?
What info does measuring the lifetime of a defect-related PL emission tell us?
(vid. attached images) The Isc and Voc are as expected, but the initial curve appears to show a decline as the voltage increases, which is characteristic of a high resistance and low FF, but suddenly the curve spikes just before the MPP and then, as normal, drops down the Voc. What is causing this spike?
I am using a Keithley 2420 SMU for a 4-wire IV characterisation. Illumination is by a tungsten lamp. Multiple PV cells have been tested. The cables have been changed. Both Kickstart and LabVIEW have been used to automate the SMU. Different manufacturers' PV ribbons have also been tested. None of these changes have had an effect and the kink in the curve persists.
Multiple cells of the same have been soldered type in series as well, since one module made up of nine series-connected cells provided by another researcher from a different laboratory does not exhibit this IV kink. We think this module was made from the same batch of PV cells but are not 100% sure; the manufacturer is definitely the same though. Nevertheless, the same cells soldered in series at our lab still exhibited the same kink in the IV curve.
We have a variable load which is connected to a pv panel via a boost conveter. As depicted in the figure, the controller controls the output voltage, and doesn't grant mppt. What happens when the load changes from 8 to 16 ohms, supposedly. In direct connection of a load to a pv panel, we easily draw the I_V curve and load curves and determine the operation point. Can we do the same here?
I conducted a I-V curve to measure the Isc and Voc and try to put the data into origin to fitting the curve to find the n(ideality factor) but just cannot do that.
please show me the way to do so.
already knew the equation from PVEduation.com please use other way
I am trying to extract the single diode lumped parameters of an a-si/μc-Si PV module. To analyze them at a cell level, I have to know how the cells' interconnections are, but the datasheet does not provide that information. Here, the datasheet: https://www.energymatters.com.au/images/sharp/sharp-na-f128gk.pdf (SHARP Na-f128GK). Thanks a lot!
Simulation of multijunction, bandgap grading, tunneling, fermi-level pinning, Voc-temp, Voc-illumination plots, AC simulation (nyquist plots etc), i-v Hysterisis in perovskite, Light soaking in thin films, impact of defects, solar cell device optimisation, Impurity photovolatics IPV (similar to intermediate band solar cell) and many more simulation demos for prospective publications point of view
Simulations showed a 48% rise in #solar #energy accumulation by the #photovoltaic (#PV) panels within the same installation area when installed at a 16° inclined field.
Read more about the research we are doing at the Southern Institute of Technology:
"Optimizing the inclined field for solar photovoltaic arrays."
https://www.researchgate.net/publication/339131155_Optimizing_the_Inclined_Field_for_Solar_Photovoltaic_Arrays (Elsevier: Renewable Energy)
#solarpv #solarenergy #solarenergysystem #solarpanels #solarinstallation #appropriatetechnology #cleantech #renewableenergy #sustainability #solarnews #newzealand pv magazine Asia Solar PV Magazine NZAID New Zealand Ministry of Foreign Affairs & Trade Auckland University of Technology NED University of Engineering and Technology
Normally solar cells are interconnected in series or parallel within a photovoltaic module. Is there a general rule of thumb for this? Does this depend on the technology: poly-Si, PERC, HIT, CPV, Thin-film, or is there another reason? Thank you very much in advance.
We intend to use a synthetic mineral dye for use in the dye-sensitized solar cell. But this color is not soluble in any solvent. What method do you suggest for absorbing this dye on the titanium dioxide layer?
I am urgently looking for information on the amount [t] of waste from used photovoltaic panels and lithium batteries at the level of Poland, the EU and the world from 2019 with projections until 2050.
I am working on the fabrication of perovskite solar cells. To improve their performance, I am trying to prepare doped perovskites. However, I am faced with the challenge to optimize the dopant concentration ratio ( mol%). Can anyone please shed light upon the following question?
1: What factors should be considered while deciding the concentration ratio of the additive for perovskites?
Thank you for your support.
Abdul Sattar Chaudry
In the computer modeling and simulation of floatovoltaic systems in marine environments or freshwater reservoirs, a floating PV photovoltaic array performance model and simulation need to characterize the FSPV or FPV irrigation reservoir water evaporation benefits in sustainability assessment for sustainable development energy projects. Quantifying evaporative water-saving is a key project viability metric in a techno-economic model for FPV hydropower hybrid performance models for hydroelectric facilities, or to estimate floating PV array operating temperature or floating PV module internal cell temperature changes in comparative studies for floating FPV and ground-mounted PV or GPV.
Computer estimation of evaporation from a water surface of a water basin or wastewater basin is often calculated in Matlab or Python through mathematical evaporation models, by using parameters such as solar radiation, air temperature, humidity, water temperature, wind velocity, etc. While various applications and modifications of the Penman method, Penman-Monteith equations or Priestley-Taylor evaporation rates are used to predict or determine evapotranspiration rates in various solar water pond cover configurations, and PV floater design types as a sustainability indicator.
However, most water surface modeling or reservoir evaporation methodologies seem to be based on average daily solar irradiation rates, meaning real-time simulation model predictions need to be adapted to account for more instantaneous hour-to-hour solar irradiation data model inputs, ambient temperature variations, wind variations, airmass, relative humidity, water temperature or weather prediction data obtained from remote sensing and weather prediction data.
In a recent publication (link below) on environmental impact assessment of floating solar PV, we propose a method to time-normalize the hourly predictions of floating solar PV evaporation rates in a water-energy-land-food nexus metric, but would like to know from researchers and scientists if literature is available to discuss other scientific data engineering options for hour-to-hour or even-minute-to-minute evaporation rate estimations on open water surfaces as a means to quantify the evaporation savings of an FPV prototype in a real-time simulation model:
Conference Paper Assessment of the evaporation rate in reservoir partially co...
Can you please send examples of a technico-economical study of a photovoltaic project?
Floating robots in the ocean oscillate hundreds of times between the surface and the deep ocean where pressure may exceed 60 MPa. It would be nice if we could recharge their batteries while floating at the surface, but what kind of solar cell might resist repeated excursions to such high pressures. If they do not exist, is there a photovoltaic research group interested to collaborate in a project to monitor the ocean environment by developing pressure resistant solar cells?
I am working on the fabrication of perovskite solar cells. I am interested to study charge carrier dynamics and recombination resistance. For that, I need to perform EIS of perovskite films. Please suggest any standard electrolyte for EIS of perovskite films. Thank you!
It is generally known that a higher surface recombination velocity (SRV) tends to lower the device performance (e.g. Voc) due to a higher recombination at the metal and semiconductor interface. However, how SRV at extreme low cases (e.g. SRV << 10 cm/s) affect the schottky junction in terms of transport? If there are any publications have study the impact of SRV (esepcially at an extreme low SRV) on MS solar cells transport (e.g. FF) ?
I have previously using Silvaco TCAD simulating the Metal-Si junction solar cell to study how work function and SRV effect on device performance. The main transport mechanism at the interface is using schottky thermonic emission model. I find that Voc tends to increases when SRV decreases at all workfunction as I expected, however there is an optmized point of FF interms of SRV as illustrated in the figures. The optimized point of FF is due to a change in the shape of light IV characteristics when SRV is 100cm/S below and finally leading to an s-kirk in the IV at extreme low SRV <=1 cm/S. I have concerns if the model is valid or if such extreme low SRV is physcially existing?
Most of publications studying SRV impact is foucsing its impact on Voc and usually fall in the range of 1E2-1E7 cm/s. I am particular interesting in SRV impact on MS interface. Can anyone suggest any publications, if any, regarding to my questions.
I have calculated the J-V characteristics of the materials but little bit confused about Explanation. Can anyone guide me on this while the voltages are zero and the J-V curve show some +ve current value?
Thanks in advance for your valuable suggestion and precious time
I am looking for an expert in simulation of thin film solar cells by SCAPS-1D software. I am interested in investigating the potential photovoltaic performance of ZnSe/PbSe junctions for simple junction-based thin film solar cells. In particular, I want to study the system ITO/ZnSe/PbSe/Ag under diferent conditions. I can provide all the necessary optoelectronic parameters of the cell components for simulations.
I would like to collaborate with an expert in this field, offering a potential publication in a high impact journal. For more details, please contact me by this medium or e-mail (email@example.com).
The attached pfd file has been created with 16.0.1 (6018) version which I do not have access to.
I would appreciate it if someone with the PowerFactory v16.0.1 or newer could import the attached pfd file and export it to an older version (v15.1.7 or older).
I want to simulate a solar (thermal or photovoltaic thermal) power plant in TRNsys. My goal is to evaluate using nanofluid instead of water in solar panels as coolants. Considering nanoparticles improve the efficiency of power plant by increasing thermal conductivity (TC) of base fluid.
My problem is that none of solar panel composites in TRNsys don't include TC as a parameter, so I can't calculate the increased efficiency by different thermal conductivity of fluids.
I saw a lot of researches in this subject which have been done by TRNsys, but I don't know how they impacted TC of fluid in the simulation.
Here are two examples of the papers that I mentioned:
Thanks a lot for your help!
Hope you are doing well. I am trying to fabricate perovskite solar cells based on nip configuration structure. After patterning FTO Glass slides with Zn and 2M HCL, I am using heat-resistant Kapton tape to mask the targeted areas shown in the figure attached to spin coat subsequent layers. I have the following questions related to the fabrication process:
1: Does Kapton tape adhesive deposited on FTO and Etched side effect charge carrier collection and transportation to the contacts?
2: If yes, how can I remove the adhesive residue of Kapton tape without damaging the perovskite absorber layer?
3: Is there any other way to prevent the deposition of layers on bare FTO and etched surfaces?
Thank you for your time. I really appreciate your help!
Please can you tell me about the design "CDA02-1000V". In this design it uses resistor divider network but the actual design consists of 4 resistors in series and parallel and in the image it is different. Resistor R27 and R28, i do not know how the connection is but i think it is connected with Capacitors (C6 and C9 in parallel). I have attached the design and image below. Please can you share some insights or guide me because i am trying to scale down 1000 V to +-2.5V for photovoltaic application, so please can you have a check ?
we are searching for publications on the occurrence of European nightjar (Caprimulgus europaeus) in solar parcs. Does the species breed and/or feed there? How do the photovoltaic modules affect the occurrence of the species?
Thank you for your replies.