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Solar Power - Science topic

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The goal is to publish the results in reputable scientific journals.
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@Sumit Verma can we collaborate on a similar project?
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a. Considering shadowing
b. PVsyst answer is 425000-panel (without considering shadowing)
c. coordinate system : X=53.2054 Y=30.6173
I'm looking for a practical solution that has been applied on a real scale.
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Dear Meysam Asadi:
At the first, and as you know we can say the following:
-- Solar panel output per m2 (square meter):
The most popular domestic solar panel system is 4 kW. This has 16 panels, with each one:
around 1.6 square meters (m2) in size
rated to produce roughly 265 watts (W) of power (in ideal conditions)
To work out the output per square meter, use this formula:
Number of panels x Capacity of the solar panel system
Capacity ÷ Total size of the system (number of panels x size of one panel)
For Example:
16 panels of 265 W each:
# 16 x 265 = a capacity of 4,240 kW.
# The total size of the system (16 panels of 1.6 m2 each).
# 4,240 ÷ 25.6 = 165 W per m2
-- Factors affecting the solar panel output:
The amount of electricity produced by a solar panel can vary based on these factors:
1- Solar panel efficiency
2- Solar panel size
3- Type of solar panel
4- Capacity
5- Location
6- Solar panel direction
You can benefit from these online calculators:
I hope it will be helpful ...
Best wishes ...
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I want to make a surface map combining rain and solar power data and dew data. Both are open access, but I don't know how to combine them into one single map showing the peaks of rain, dew and solar power.
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Igor Luketina Overlay analysis may be performed in two ways: feature overlay (overlaying points, lines, or polygons) and raster overlay. Some overlay analyses lend themselves to one of these procedures or the other.
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I have put together this simple combined solar/natural gas turbine power plant model as an Excel spreadsheet. The demand (electric power consumed) is actual data from DoE (you can download more from their site). The incident solar irradiation is calculated from solar position (you can input the latitude and longitude). The cloudiness is random, based on the mean and standard deviation. The CCPP heat rate is approximate, though realistic (you can elaborate to make it more accurate). Natural gas is consumed as needed to meet demand not derived from the solar panels. The maintenance and initial unit costs are user inputs, as is the lifetime and interest rate, and fuel price. Push the button and it adjusts the rate ($/kWh) so that the plant breaks even for the year. You can add more buttons and calculations to investigate other scenarios. All of the inputs and outputs are reasonable and based on values readily available on the Web. Enjoy!
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Dudley J Benton Great, Thanks for sharing, The Value of Solar Methodology takes into account the unique characteristics of solar PV production, in which systems create energy on the peak, provide power at the point of use, do not require continual fuel purchases, and offer considerable security and environmental advantages over fossil fuels.
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which best algorithm can be used for solar panel defect findings, image processing and forecasting using AI in solar power plants ?
please suggest Top algorithm and models in solar PV plant used presently
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Neura network is suitable
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I am trying to find out how to find how much thermal energy is generated at the receiver of an SPT system. I believe it is dependent on the DNI of the location and the number of reflective surfaces (total area of reflective surfaces), among other variables. Still, I have no idea how they relate with each other, and I am finding it difficult to find helpful information.
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Hello dear researcher, you can use the following paper :
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When using Wasserstein balls to describe the uncertainty set in distributionally robust optimization, can multiple sources of uncertainty be considered at the same time, such as wind power and solar power forecast error?
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15 power plants are geographically spaced and what is required is the combination of any of the 15 that would give the least variability in total power output. The hourly power output for each power plant is available for a period of one year.
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Interesting information
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The unavailability of this software makes me difficult to design this system.
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You can try the PVsyst software:
Regards,
K
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Impact of EV and Solar
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In the near future, electric vehicles are likely to gain a significant market share. Apart from the numerous benefits of massive usage of electric vehicles, this can lead to some problems in the electrical system, such as the power quality and reliability of the electric distribution system. For example, when the battery is charged, the transformer may get overloaded and a faster-aging may occur. The use of solar photovoltaic (PV) in electric vehicle charging stations or in car parking spaces could be a solution. While intelligently coupling photovoltaic system and electric vehicles on the electric grid have the advantages like a significant reduction in energy and carbon emissions of the transportation sector, increased reliability of the system
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Smartbox or energy is an important item of a solar power system. I would be grateful if someone can help me/suggest a literature source to find life cycle inventory of the smart box. Thanks.
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What is the system you have worked with / suggesting to system analyze all photovoltaic and photoconductive characteristics of all types of solar cells?
Thank you.
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If we keep increasing the tower height, the optical efficiency increases. It reaches a maximum at tower height of 120m. Then, on increasing the tower height the efficiency reduces.
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Dear Kinshuk:
first of all, and as you know the “heliostats” are basically large mirrors equipped with computer controlled sun tracking mechanisms that keep the mirrors aligned so the reflected rays of the sun are always aimed at the blackened heat absorbing receiver creating a focal point. For multiple mirror heliostats, the position and orientation of the individual mirrors on top of the supporting structure is different for every heliostat within the same heliostat field to take account of its relative position and angle towards the tower.
However, heliostats placed far away from the solar tower are less efficient as the strength of the reflected solar energy reduces the longer the distance traveled. The outer heliostats have to be installed further away from their neighbouring heliostats to eliminate shading and require highly precise tracking mechanisms to keep the reflected sunlight at the correct position on the tower.
and here we can say the following:
The height of the solar tower on which the central receiver is mounted also plays a role in the layout of the heliostat field. Higher towers of between 80 to 110 metres (250-to-350 feet) are preferred as larger denser heliostat fields can be used reducing the effects of shading and also of land usage. However, this is offset by increased tower and installation costs, as well as the expense of extremely precise tracking requirements for a large majority of the heliostat field, and not just the ones furthest away.
high temperature heat transfer fluid or working medium in the central receiver absorbs the highly concentrated radiation reflected by the heliostat field and converts this thermal energy into super-heated high pressure steam to be used on the ground to spin a series of turbines, much like a traditional power plant to generate electricity.
###########
Also you can benefit from these valuable articles:
1- "Optimum Height and Tilt Angle of the Solar Receiver for a 30 kWe Solar Tower Power Plant for the Electricity Production in the Sahelian Zone".
2_https://www.sciencedirect.com/topics/engineering/solar-power-tower.
I hope it will be helpful..
With my best regards...
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I am trying to simulate a problem, where I need R1, R2, H1, H2 and concentrated flux on the absorber. The nomenclatures are shown in the attached figure.
I will be thankful if someone helps me in getting the aforementioned data for a power plant.
Thank you
------
Manoj Kumar Sharma
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I need a clear information on countries with the highest Installed Solar Capacity....
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You will find that China is the country with most installed PV stations then comes the USA.
best wishes
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We are working on an automatic self-tracking solar panel (it's patentable work). If anyone is interested in collaborating, please let me know.
NB: Image added for reachability, it's not the real work.
#patent #patents #research #solarenergy #solarpv #self #tracking #trackingsystems #trackingsolutions #trackingsolutions
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Can you explain how the collaboration will be organized and carried out.
For example, if one has a design then one can send you the design where you review it, implement it and test it and give feed back to the designer such that one finally get a professional two axis tracking system.
Then the design will be patented in common with you at your university.
What is the period of this project?
Are you working also on new encapsulation technologies for solar panels?
Please inform me as I have interest in such collaboration.
Best wishes
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Does anyone have any idea how to evaluate a supper capacitor with a 10Watt solar PV system?
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Structure Erection and Civil Works
1)Brief on civil foundation and, erection of supporting structures.
2) Fixing the foundation of the structure and, the grounding considerations.
3) Installation of mechanical structure
4) Foundation: Reinforcement and Shutting other balance of systems
5) Mechanical safety aspects.
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This is a good question.
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Here is my little effort for answering this question during 2021 SITOPARA Research Conference (New Zealand, 15 Oct):
Please share your comments!
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If you can get 6 times the yield from a vertical farm that means that the photosynthetic process in vertical farms is 6 times as efficient as in horizontal ones. I would like to see some evidence of this. The efficiency of photosynthesis is fixed by physics, not the orientation of leaves.
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I am looking to assess the roof top solar energy potential for an approximate area of 250000 sq.m with an annual average solar irradiation of 1266.52 W/sq.m and related size of Solar power plant.
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Hello Everyone. I would like an expert to explain to me the difference in terms of variable solar power injection into the grid and high penetration of solar power into the grid. Which one affects grid dynamic stability which one affects transient stability of the grid.
In my own understanding I am of the view that varying power injection into the grid affects the dynamic stability while the high power penetration specifically affects transient stability.
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I think it depends on: impact area: microgrid, region, country
and the share of solar energy production in relation to total energy needs.
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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."
#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
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Really it is a good research idea is to maximize the recieved solar radiation under with the minimum horizontal area. There are places where the land are not easily available. But in Egypt we do not have such constraints. We have extended Sahara around the Nile delta and valley.
But this can be argument against your study , since the reducing the field will also reduce the cost of cabling and installations.
Best wishes
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You can increase the #solar power generation in your backyard by installing the #PV panels at varying tilt angles and row-spacings. 14% better performance was calculated for a site in #Auckland. This makes our research at the Southern Institute of Technology so significant. Let's find out more about our research: "An optical-energy model for optimizing the geometrical layout of solar photovoltaic arrays in a constrained field (Elsevier Renewable Energy)"
#solarpv #solarenergy #solarenergysystem #solarpanels #solarinstallation #appropriatetechnology #cleantech #renewableenergy #sustainability #solarnews #newzealand
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Hi Sivabalan Kaniapan, thank you for the comment. There might be more or fewer losses at certain times compared to the conventional installation. Therefore, the results are based on energy accumulation over time. In general, the designers are more interested in year-round performances rather than instantaneous ones.
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I'm working on predicting solar power and I have some small negative values of irradiance. Is it normal ? should I replace it by zero or the absolute value ?
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You need to be more specific about the kind of instrument that generates such values. If it is a thermopile pyranometer or pyrheliometer, as I surmise, and absolute values are only a few Watts, that is normal. During nighttime, you would also see negative values, down to -20 W/m2 depending on instrument model. All that is caused by their thermal offset.
Larger negative values would be caused by experimental problems with the instrument, datalogger, cabling, etc.
Ideally, you would evaluate the thermal offset first, using nighttime data, and then scaling up your daytime data by the same amount. For more details, see
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I'm working on predicting solar power output using machine learning, but I can't find a public dabases of solar power output with 1 minute step.
I only find databases with 1 hour step, and an other databases of irradiance with 1 minute step. So I decided to use this databases to calculate the power solar output for each 1 minute, and then use the results to train my machine learning model...
I've seen that there's a linear model that we can use to calculate the power solar output using irradiance.
Does anyone know how to find it ? or another solution ?
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welcome!
In order to get the output power given the input irradiance you need to multiply the input by the conversion efficiency. You can find data for the conversion efficiency
for different commertial solar cells as a function of T and the irradiance G.
It is assumed that Eta is more less independent on G and its dependence on temperature is known.
This could be a possible solution.
Best wishes
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During power outage, when solar operates at full load, how can DG operate at it's best efficiency at low speed?
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Here DG means Diesel Generator set? If yes, then, it can not operate at full efficiency due to reactive power requirement of Solar PV system.
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I am doing my research work in this field,so i think any one can help by saying solution to this problem,i have refered so many articles but i could not found solution. If any related papers are their on this please upload
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Hi. By using the solar pumps.
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I am simulating a solar powered absorption chiller. But I want to manipulate ots working time. For example, the system will run from 6 am to 10 am, then a break of 4 hours and then again run for four hours and then stop. How do I achieve this ?
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Dear Auritro,
Go to TRNSYS library>Utility>Time values> Type 21.
It gives you the time of simulation and you can define manipulate it.
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I have an unpublished journal paper title "Describing and analyzing spatial patterns of household PV installation in Queensland, Australia". I want to submit it in a journal (Q2 or Q3). Can anyone suggest to me any good quality Q2 or Q3 journal that can fit this article?
The abstract of the journal is:
About 30% or more of Queensland's homes offer rooftop solar power systems i.e., photovoltaic (PV). Though, the reasons affecting the decisions regarding PV installations in regional and metropolitan cities in Queensland are still unknown. This paper studies the trends of solar power installations between the metropolitan city of Brisbane and some regional cities of Queensland and finds the important factors that influence the fluctuations of solar power installations between metropolitan and regional cities. Trends and patterns in PV installations were identified using ancillary data and a quantitative methodology supported by an Autoregressive Integrated Moving Average (ARIMA) model. This paper found that in the Brisbane metropolitan area PV installations would have an upward trend after 2020 while regional Queensland would decline after 2020 from its peak position at present. The study also found that owner-occupied separate houses with three or more bedrooms had more PV systems installed compared to those with less than three bedrooms. Therefore, these findings can help to target potential customers as well as future planning for PV expansion.
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I agree with Mavd Ribeiro Teles and Md. Hasanuzzaman that many good publishers have created useful tools that help us to find an appropriate journal. After adding the title and the abstract you will get useful proposals. I have used Journal Suggester from two publishers, and also Journal Finder.
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For an domestic load to optimize the usage of wind and solar power ,i would have control circuit along with GRID supply without storing in batteries .kindly provide the possible ideas on this view.
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Using electricity directly; without electric storage devices; from wind turbines is a negative practice. Current will always calibrate causing instability issues, in addition to safety.
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Hello everyone,
I would like to simulate a thermal power profile (in W or kW) of the PV and solar thermal system. Does anyone know a program to simulate this kind of thermal profile or a rule of thumb to estimate it? I'm wondering whether it is possible to deduce from an electrical pv profile, for example, 10%P_pv_el could be converted into thermal power, it is just a random deduction since I still don't know. Because I only have a measured pv profile and have to work with solar thermal system as well. I'm really new in this field so I would appreciate any suggestion.
Thank you in advance.
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I think you can carry out the thermal modeling of the PV/T solar system (even airbase of water base) by achieving the energy balance. Then you can easily build a computer program to do the necessary calculations to estimate the thermal profile in terms of the most critical parameters such as the solar radiation and the mass rate of flow.
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Hello everyone, I need your help.
I intend to do a case study of solar power plants for the production of green hydrogen in Chile.
I heard from SAM, HOMER, which one would be better?
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Dear Karla Beyzaga Karla Beyzaga
You can use de HOMER
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Hello,
I am currently working on Steam generation using solar power and I needed a light source to provide me with an irradiance of at least 1000W/m2, 1 sun.
I currently have a Phillips PAR38, 120W Halogen lamp, but I don't understand how I could use it or calibrate it as a 1000W/m2 light source.
Any help would be appreciated.
Thank you.
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Hi everyone,
I'm doing a project looking at the efficacy of a solar powered fridge in Zanzibar and am trying to find weather data to get an idea of the conditions. DOes anyone know where this kind of informagtion can be found?
Ideally it would have irradiance, temperature, windspeed etc. in an hourly breakdown.
If anyone has any idea where this could be found it would be greatly appreciated
Cheers
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in my opinion, you won't find all of this information in one tool.
I can give you a general key figure for Tanzania so that you can estimate the PV energy.
Quote: Tanzania has high levels of solar energy, ranging between 2,800-3,500 hours of sunshine per year, and a global horizontal radiation of 4–7 kWh per m2 per day.
Link / Citation:
You may find more detailed information on the weather maps below.
I once included a global wind speed map (English) and a global weather map (unfortunately in German) where the wind data and sun data can be displayed.
Link:
Otherwise, I would only have the idea that you would send an email to the two organizations that deal with renewable energy in Zanzibar.
I hope it helps you a little. Nice greetings.
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Hi,
Could you help me to get the latest (2019, 2020) solar resource data for a particular site in JAPAN?
PV GIS and NSRDB data are not in reach to JAPAN, I'm looking for some other database for JAPAN.
Thanks,
Saran
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check the Global Solar Atlas with this link you find your needed data :
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I am trying to scientifically explain the differences between the following two cases:
Case 1: Building a machine learning model to predict the solar power generation for a single solar plant (using power data only)
Case 2: Building a machine learning model to predict the (total) solar power generation for a region (consists of multiple solar plants) (using power data only)
I think these are different problems because they are representing two different scales, for the regional model the scale of the data is much more different.
However, I couldn't think about other reasons!
Any univariate model should works for any of the 2 cases similarly. Is this claim True?
Any thoughts?
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Dear Sarah,
welcome!
According to your private comment on my answer asking me to elaborate on my answer I would like to precise it:
If we have a region containing different stations, then the behavior of the whole region will be the average of the behavior of the local stations with a specific standard deviation because of the effect of the local random variables. This answer may be more rigorous than my previous answer. Best wishes
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How can I have a constant temperature in solar-thermal system output?
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وكانت دراسة سابقة أجراها فريق من معهد قطر لبحوث البيئة والطاقة وكلية ترينتي الإيرلندية على مادة البيروفسكايت في محاولة لفهم أكبر لخواصها، أظهرت أن مكوني المادة –العضوي وغير العضوي- يسهمان في جمع الطاقة الشمسية وتحويلها إلى كهرباء؛ «فالجزء غير العضوي من البيروفسكايت -الرصاص ثلاثي اليوديد- هو المسؤول عن الاحتفاظ بالضوء. وفي نفس الوقت، يطيل الجزء العضوي من المركب من عمر الإلكترونات المفعّلة ضوئيًّا، مساندًا جمعها ككهرباء، ورافعًا من الكفاءة الفوتوفولتية للبيروفسكايت الهجين» حسبما ورد في الدراسة. وهو ما يعني إمكانية تصميم مركبات جديدة لعمل خلايا تجمع الطاقة الشمسية بتكلفة أقل من تصنيع الخلايا السيليكونية وبقدرات أكبر
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It requires higher electrical energy to produce primary Aluminium . Most of the energy source is fossil fuel responsible for GHG emissions. Hyro power is also another source for many.
Solar is emerging as a viable and reliable source of green energy. Can electricity produced through Solar route be made useful and practical source of energy for primary Aluminium making.
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Mila Ilieva
-Thanks .
Piotr Olczak -Thanks for your response. I did not mean efficiency ...it was efficacy ...I wanted to mean effectiveness... If one can share if he/she comes across any info whether Solar power has been effectively used in Electrolysis (Hall & Herault process ) for making primary Aluminium. Thanks again for mentioning PV etc.
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please explain what kind of difficult ,if using commercial solar cell with external source (solar concentrators )to improve the efficiency .
And what are the materials used to make solar concentrators.
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welcome!
I will not repeat which has been said by the colleague Hussein A Kazem .
When you use commertial solar cells designed for terrestrial use, the concentration ratio is limited to few suns.
You have also to cool the solar cell to limit the temperature rise with concentrated sun light. The experiment which you want to run is already carried out previously may be many times.
For more information please refer to the paper in the link:
Best wishes
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In recent years a new development happened in solar refrigerator design by eliminating expensive and problematic energy storage batteries. The technology so-called, direct-drive refrigeration technology uses solar power to freeze water or other phase change material. During the night and cloudy days, the refrigerator uses the ice bank for cooling and maintaining the setpoint temperature. The direct-drive refrigerator is directly connected to the photovoltaic generators and which can run in low voltages
Can anyone explain how to calculate the cooling load of (W) refrigerator including energy storage in ice bank for the night and cloudy days? How to calculate the required level of PV panel? Some examples would be very useful . Thank you
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I have a tecno-economic study for solar PV project on hand. The national policy has a binding of 50% local and 50% foreign funding (both having different debt terms and interest rates). Apparently, RETScreen facilitates inputting either of the two financing schemes. Anybody having idea how to conduct such financial analysis (Level II) with such conditions.
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Thank you Waqas and Mohamed. Of course we can follow that approach. But it would extremely complex to 'average out' the results.
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Dear Researchers and Academics;
A question came into my mind about the environmental considerations of the solar power technologies.
I looked at more than 300 questions, but I could not find any question about this subject.
I tried to find some publications, but I could not find any direct study related to this question.
Can you please help me to find any answer to this question?
Which solar power technology (CSP, PV, CPV) is more environmentally sound friendly considering its whole materials and their manufacturing processes?
Raw materials, their mining processes, their manufacturing processes and finally to end product for CSP, PV or CPV usage.
I would like to thank all of you who contribute to this question in advance.
Best Regards
Burak Omer Saracoglu
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While one can use relatively low processing temperatures to produce conventional pv solar cells, the sun concentrated solar cells must be produced with the highest efficiency and material durability. So, the pv solar cells always tend to consume less energy for their production with time. Which means that they become always environmental friendly with time.
I think this will be hard to apply for sun concentrated solar ells.
There are tremendous efforts to make the pv cells having smaller energy budget for their production. This is a major research target.
Best wishes
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Currently working on a lunar rover for a university masters project, my colleagues have successfully developed a code that considers not only where the solar panels are situated in relation to each other due to the rover shape (1 on each side ) but also the long and lat for the position on the moon.
I reach out to people in the relevant field for a helping hand in developing this code as it fails to include the sun elevation, although it remains low when at the poles which is the likely landing site it will change the power output of the panels especially when terrain is also considered.
Advice/Tips/Suggestions fully welcome!!
Thank you.
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Any suggestions on research topics on solar power and batter management system in an off grid system
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Read the papers on my Researchgate page
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Hi,
I am trying to find out what adjustments does the grid-tied/on-grid solar inverter make to send excess solar power back on to the grid. Basically how the inverter change the direction of power flow. Does it adjust the phase shift between the incoming supply/inverter output or adjust the magnitude of the voltage of the inverter output? Will appreciate any information and possible waveform if available.
Thank you.
Regards.
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It has to do with the how the inverter operates in the consatnt current or the constant voltage mode. In order to control the power flow from the inverter to the grid it is operated in the output current constant mode. The controller of the inverter forces it to source out consatnt current in the grid which has a constant voltage. When connecting a load across the output of the inverter its voltage will be constant. So it flows also a consatnt current towards the combination of the load and the grid. So, you can assume that the loads takes its power from the grid and the inverter injects its power to the grid. If its current is greater than the load current the spurious will effectively flow in the grid. When it current is smaller than the load current it means that the load will take this deficiency current from the grid.
Best wishes
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Dear colleagues,
Please, could you fill this questionnaire which will take a few minutes of your time. It is completely ‎anonymous and will only be used to define the market target. ‎
This self-questionnaire is part of a Startup project in the field of solar and renewable technologies, which will ‎initially aim to satisfy the monitoring, operation and maintenance (O&M) sector in solar power ‎plants (photovoltaic and thermal technology). ‎
Thank you in advance for your help and collaboration. ‎
Questionnaire link :
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Yes Dear sure.
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Dear PV & CSP suppliers, scientists, engineers, operators,
We are two PhD students at Green Energy Park (GEP) research platform on solar energy created by IRESEN working on the field of solar power plant degradation, monitoring, and inspection. As a part of Venture Explorer Innovation Fund program launched by the Mohammed VI Polytechnic University (UM6P) and Massachusetts Institute of Technology (MIT), we represent the IOM Solutions project which aims to satisfy the monitoring, operation, and maintenance (O&M) sector in solar power ‎plants by providing innovative and efficient systems (photovoltaic, thermal technologies, pipelines, etc.).
We kindly ask you to fill this survey which will take a few minutes of your time. It is completely ‎anonymous and will only be used in this work.
Thank you in advance for your help and collaboration. ‎
Questionnaire link (English version) :
Questionnaire link (French version) :
Massaab EL YDRISSI, elydrissi@iresen.org
Alae Azouzoute, azouzoute@iresen.org
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Good job
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Currently designing power system for Lunar rover. Solar power and RTG are the planned power sources during sunlit periods however secondary Li-ion batteries will be used to operate in PSR's, these will of course rely on solar power to recharge as the RTG produces only 30We. By calculation the batteries should take around 3-5hrs to recharge however I'm concerned about the power required to do this? Simply, P=IV and so if the 60Ah 28V battery has a 7 amp charge current it would require 196W (7*28). This seems high but I can't seem to justify another method of calculating this??
I also ask for advice on how to distribute the batteries throughout the rover? Fewer large packs with high Ah ratings or smaller packs but more of them?
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Dear Shannon,
I agree with colleagues above to calculate the energy demand for charging a battery with 28 volt, and 60 Ah. It is required to set the depth of charge such that to preserve its lifetime. May be 80 percent for lithium ion batteries are acceptable but you have to review it returning to the data sheets of the battery.
So need to charge the battery for .8x 60= 48 Ah.
The charging time depends on the charging current.
One must be aware there is specific nominal charging current for any battery.
Physically the such battery size is composed fro an assembly of battery cells.
For space it is always advisable to divide them into units which can better handled
and also that may allow a total more nominal charging current.
Such that you charge it in smaller time than the sun shine period.
So the period of charging is dictated by time of sunshine, then it remains to select the battery of the group of batteries that will satisfy the nominal charging current.
The Ah=48= Nominal charging current x sun shine hours. For charging form the PV generator you need to put a controller between the Generator and the battery
to grantee the safe operation of the battery.
For the best charging method of the battery please see the paper:
The needed energy will be more than the stored energy because the charging process efficiency is less than one. So one has to divide the stored energy by the efficiency to get the total required energy from the charging electric generator.
As for the thermal variations, as the battery will be in a container with the electronics the whole container will be thermally regulated to reduce the temperature fluctuations to that can be accommodated by the components.
Best wishes
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Dear PV & CSP suppliers, scientists, engineers, operators,
We are two PhD students at Green Energy Park (GEP) research platform on solar energy created by IRESEN working on the field of solar power plant degradation, monitoring, and inspection. As a part of Venture Explorer Innovation Fund program launched by the Mohammed VI Polytechnic University (UM6P) and Massachusetts Institute of Technology (MIT), we represent the IOM Solutions project which aims to satisfy the monitoring, operation, and maintenance (O&M) sector in solar power ‎plants by providing innovative and efficient systems (photovoltaic, thermal technologies, pipelines, etc.).
We kindly ask you to fill this survey which will take a few minutes of your time. It is completely ‎anonymous and will only be used in this work.
Thank you in advance for your help and collaboration. ‎
Questionnaire link (English version) :
Questionnaire link (French version) :
Massaab EL YDRISSI, elydrissi@iresen.org
Alae Azouzoute, azouzoute@iresen.org
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The questionnaire is filled.
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How solar energy can be used to operate pumps? How much solar energy can be generated?
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Dear Saurabh,
The photovoltaic generators can be built with the size you want and then you can condition the generated power to derive DC motors and or AC induction motors.
These types of motors can be used to work the water pumps.
Now the cost of the PV generators are went down such that they become economical in many applications including the large power electricity generation.
You can find that Gwp power stations are built in China and in USA.
For water pumping for irrigation example see the paper:
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I am looking for a method or component that helps maintaining MPP while charging battery from solar power without using buck-boost converter (may be a cheaper device can be used)
Can anyone give me links below if there are articles for the topic?
Thanks
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I like this discussion...👍
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Does the change in load affects maximum power point in PV systems? (I think the answer is Yes). Then, why do all MPPT techniques only concern themselves with the changes in environmental conditions (irradiation)?
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Dear Ahmad ,My answer may be late but as this question needs a conceptual answer.
It is so that the MPPT controller works such that the the PV array works at its maximum point what ever the load is. The DC/DC converter operates as a matching transformer. It is capable to match the solar array with a a variable load
naturally in a specific range of variations.
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Solar Power, Interconnection with grid, Residential project
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With new research for efficiency of solar cells, solar power generation cost will gradually reduce. Grid connections of solar panels will be more viable as more and more houses and establishments join. Viability compared to other power services is important consideration. Fossil fuels, global warming, climate change issues are vital.
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Free-piston stirling engines (FPSE) have been used by NASA for space power conversion for more than 30 years. Is there a new simpler machine that could replace FPSE?
Thanks.
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I agree and I like the proposition of Bo Miao
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I am trying to figure out how to implement transfer matrix method to calculate how much of solar power gets absorbed in each layer. I am readying "Modeling photocurrent action spectra of photovoltaic devices based on organic thin films" by L. A. A. Pettersson, L. S. Roman, O. Inganas.
According to the equation I attached, I can calculate the internal electric field propagating in the positive x direction in layer j. I can calculate the term in front of E0+, but I am not sure what to plug in for E0+. What would be the electric field intensity of sunlight using AM1.5G?
The reflection coefficient and transmission coefficient are specific to a certain wavelength, then how does that apply to sunlight? Do I need the irradiance of sunlight at specific wavelength? How do I calculate that?
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Dear Mr. Kim,
It is so the power density p is related to the electric field E where
p= E^2/Z0 where E is the effective value of the electric field and Z0 is the characteristic impedance. Z0 in the air is known where it is equal to 377 Ohm.
You can get the reflection coefficient and the absorption efficient from the material properties. They apply to sun light by considering them at the wavelength of the light and frequency.
Inside the material p= E^2/ Z0 in the material.
Best wishes
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The protection of solar power system from lightning we use lightning rod. how much area cover an lightning rod, and what is the minimum wire size we use for it.
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Solar power plants are best installed in steppe zones. Will large areas of solar panels affect the ecosystem of the steppes?
Thanks for the comments.
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The proposed Samarkand Solar Power Project (the Project) aims to increase renewable energy generation and reduce greenhouse gas emissions (GHG) in Uzbekistan. The Project has two main components: (i) construction of a 100 megawatt (MW) grid-connected crystalline photovoltaic (PV) power plant with single axis tracking system; (ii) institutional capacity building on solar energy and grid integration, and (iii) project management and supervision.
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Hi, I am working on a PV system model with battery and I need your expertise on an issue. When I check the power value of my pv panel with constant irradiance and battery, the power values for both of them are fluctuating. I check the output from the charging and discharging terminal, it seems that it is charging and discharging at the same time, would this be the cause for power flucuation? Would the PWM generator cause the PV panel's power output to fluctuate?
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I interested
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is there any opportunity for entrepreneur in Renewable energy sector.
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Dear Parwinder Kaur
In my view, of course, there are many valuable opportunities for businessmen in the renewable energy sector.
Because it depends on businessmen and governments investing their money in this profitable energy 100%.
Best regards
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During the last decade, many research has been introduced to forecast power energy such as solar, wind and wave. However, I would like to know the best methodologies used in this study.
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One important question in this research is how to compare alternative forecasting methods.
Let me recommend this paper:
On page 8 you can find a step-by-step algorithm of how to compare alternative forecasting procedures.
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Two 12 V, 250 Ah batteries are connected in series and then connected in parallel
with two more series-connected batteries of the same type. What is the total output
voltage and Ah rating of the battery array?
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Deep-cycle batteries are used in solar systems because they can be completely discharged without being damaged as quickly as normal batteries, for example an acid lead-acid battery can only be discharged at a maximum of 50% to extend its useful life or else these will be damaged very quickly, this characteristic is not only reflected in the useful life but also in the amount of current stored, if you have a 100 Ah acid lead acid battery, you can only have about 50Ah taking into account the characteristics mentioned above , while if you have a 100Ah deep cycle battery, you can take advantage of the 100Ah battery. It is for this reason that these types of batteries are used in solar systems.
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Consider wind speed for wind power and solar radiance for solar power. Is it possible to consider intermittency of mentioned sources using normally ( Gaussian ) distributed random numbers in which the sigma is the average of previous days data (for instance 1 month)?
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Please check the real data from a reputable website. I don't think wind speed at most sites is Gaussian - this has been verified experimentally. But do the check, eg from NOAA or somewhere.
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Hello, we have a charger that needs a specific input voltage and an input current and its output power is known. Input voltage is 480 V and Input current is 192 A. Output power is 72 kW. Using SIMULINK, we can determine the number of parallel and series PV strings to get the IV and P-V curves of the array.
The max power occurs at a volt exceeds 500 V. Is this good or how can we correctly design the required array?
Thank you !
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Thank you dear Seyed Majid Hashemzadeh I have already reached the target.
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Today, the solar electrical industry is going with traditional photovoltaic solar panel systems, as they are a well-proven technology that saves homeowners a lot of money. However, the hassle and expenses associated with rooftop panel installations sometimes drive people away from adopting solar energy. This has led to new innovations in the world of solar power.
That’s where solar paint comes in. Imagine a technology that can produce electricity on its own, with the ability to turn an entire building’s surface into a solar-generating mechanism. If that doesn’t scream innovation, what does?
Please share your experiences, ideas, and knowledge about solar pains and how successful it will be...
Thank you
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Solar paint is currently just an ideal product from solution-processed organic solar cells or dye-sentisized solar cells. Fristly, both these two types of solar cell suffers from poor stability and relative low power conversion effeciency now. Secondly, even if the solar paint is available, it is hard to optimized it from the PV system point of view.
I think solar paint can be a good product for the small-scale user-end product, but it can't beat the silicon-based solar cell in the main PV market.
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I would be very thankful if anyone could recommend some good review papers about the scheduling or economic dispatch of RESs in the microgrids. The assessment of the greenhouse gasses in the microgrids would be a plus point.
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The increase in the trend of distributed generation has led to the formation of community microgrids. What is the best possible solution to connect single-phase loads to a microgrid with 2 level voltage source converter?
I feel one possible solution to connect single-phase loads is to use a 3-phase 4 -wire transformer.
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You can use the split DC link which includes two series capacitor in parallel with a large balancing resistor for each of them . This a simple way to provide a neutral point which its voltage clamped at half of the DC link voltage .
Special PWM generating schemes can be used for balancing of the capacitors voltages. But where the neutral current is large, it flows through the capacitors and, hence, bulky capacitors are needed to make the voltage ripple on the capacitors. Also the neutral point usually drifts and becomes unbalanced when it includes DC component. So different strategies for neutral point balancing are reported, usually using the Space Vector Pulse Width Modulation or MPC control.
A better way to provide a neutral line is to add an additional fourth leg, called a neutral leg, to the conventional three-leg converter. The neutral current can be controlled to flow through the inductor so that the neutral point is maintained at the mid-point of the DC link. This allows the phase legs and the neutral leg to be controlled independently, which means the three phases can be controlled independently as well.
Ref :
Control of Power Inverters in Renewable Energy and Smart Grid Integration https://ieeexplore.ieee.org/book/6381785
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I have data on power generation and other variables (e.g Irradiance, temp & wind speed) of last two years(on daily basis). I want to forecast the power generation using SVR so I need its MATLAB code which is easy to understand.
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Dear Mohammed,
Check the following link for the SVM Matlab toolbox.
It is easy to use.
Kind regards
Qin
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Can anyone help me to design a 3 MW grid-connected solar power microgrid system with PVSYST with economic evaluation?
Kindly, suggest the des,ign should include the number and types of panels, batteries, inverters, and controllers, etc.
Thank you
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Thanx dear Herbazi
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Hello everyone,
Can anyone guide me where can i download Geostationary meteorological satellite data/images which covers India for intra-day Solar power forecasting. What are the best industrial methods for cloud fraction to extract the same from the satellite images.
Thanks & Regards,
Malleswararao M
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i am looking for formula to calculate solar power output on hourly basis for PV plant with given rating using irradiance and diffuse irradiance. I have hourly data for irradiance and diffuse irradiance. Is there any effect of wind? if there is which equation can be used for it?
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There is a clear effect of temperature on solar cell performance. Increasing temperature decreases the efficiency of the panel. So there is a clear effect of wind as it controls panel temperature. You can refer to the formula's developed here :
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Hello I have an analytical model contains the solar angles equations that estimate the annual electric energy output from a specific PV array area at a specific location.
I need to measure the accuracy of the code by making a comparison between the analytical results and a real solar power plant. How to do this? I want to get realistic data from a power plant in Pune, India for example.
Thank you !
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Dear Ahmed,
You can try https://pvoutput.org , I think this will help you to get realistic data to check the accuracy of your code.
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I am new to simulink and am simulating a PV module with a buck converter. As you see from the equation of the output current eq(1), there will be algebraic loop. I tried a unit delay and memory to break it, it works when I test the PV module alone with a variable resistance at the output and it yeled correct results. But a unit delay or memory blocks can change the dynamic behavior of the system, so is there a way to get around the algebraic loop problem ?
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When you load the solar module by an inverter, then for a given load you have to adjust the PULSE WIDTH of the inverter to operate the module at the maximum power point under the the specified temperature and simulation condition.Then you have to get the maximum power point Vom and Iom, then you apply Vom on the inverter and vary its PULSE WIDTH till the input current to the inverter reaches Iom.
Best wishes