All Questions
Tagged with renewable-energy solar-cells
31
questions
1
vote
1
answer
34
views
Total flux is bigger than radiation flux, error?
The topic of this question is the collection of radiation from the sun. (renewable energy course) The total radiation flux is $$I_\text{total} = I_\text{direct}+I_\text{diffracted}+I_\text{reflected} ....
- 101
0
votes
1
answer
125
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Is it possible to boost solar panel output using wavelength shifting materials?
Solar panels only produce energy from a small section of the total wavelength spectrum of light. I believe some panels have a mirrored back to pass light through the solar panel a second time. Much of ...
4
votes
2
answers
242
views
To grow one $\rm m^2$ of crop plants, how many $\rm m^2$ of solar panels do you need?
In vertical farms you need to use LEDs to make plants grow, which in turn have to be powered e.g. by solar panels. If solar panels had the same efficiency as plants, then you would need the same ...
- 143
38
votes
4
answers
11k
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Why are solar panels kept tilted?
I have noticed that, in my country India, most of the solar panels are tilted southward at an angle of ${45}^{\circ} .$ Even on buildings with inverted V-shaped roofs, solar panels are still oriented ...
- 591
0
votes
1
answer
150
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On what planet within the Asteroid Belt would solar panels work the best?
I was researching for a project and came across this question. Maybe this is a bit too broad? How might solar energy work on Mars? Would it be sufficient to sustain a colony?
- 1
2
votes
1
answer
2k
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Can solar panels cool the atmosphere? [duplicate]
I am just curious if solar panels, because they absorb radiation, cool the atmosphere. If there were enough of them, would the temperature be different? I'm not a physicist or student.
- 23
2
votes
0
answers
53
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Why are spin coated polymer solar cells more efficient?
Reading papers on polymer solar cells (PSC from now on), it is seen that many different coating techniques are used in order to coat polymer films on substrates. It is also seen that spin coated ...
- 93
0
votes
1
answer
200
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Losses occurring in solar cells [closed]
If a solar cell is subjected to a light of intensity $1000$ $\text{W/m^2}$, the output at the cell is much less than ideal case scenario. What are all the factors causing energy losses in a solar cell?...
- 29
0
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1
answer
47
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Why is Alternative energy most commonly stored in metal acid batteries? [closed]
Why is alternative energy most commonly stored in relatively expensive metal acid batteries, which have a short life, rather than hydrogen gas accumulated through electrolysis?
Hydrogen is a ...
- 143
0
votes
2
answers
255
views
which is efficient on solar electricity by photo voltaic or thermal
As we know solar energy used to generate electricity in two major ways: photovoltaic and thermal energy. The most small applications or personal use are mostly using solar cells. But when it comes to ...
- 694
2
votes
8
answers
511
views
Why not use our own light production to produce new energy instead of wasting it?
Why don't we use our own light production at night (I mean home, buildings, streets,..., lighting) to charge photovoltaic panels instead of wasting it?
- 191
0
votes
2
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87
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What parameters decide the maximum concentration achieved by a fresnel lens?
Fresnel lens can be used for concentrating sunlight for Photovoltaic. What parameters of the lens decide the maximum concentration that can be achieved using the lens.
9
votes
1
answer
402
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Will the upcoming solar eclipse stress the European electrical grid?
From an article in the Financial Times today, about a solar eclipse on March 20th, 2015:
An eclipse of the sun next month could disrupt Europe’s power supplies because so many countries now use solar ...
- 93
2
votes
2
answers
4k
views
Rare earth minerals in solarcell production
When I was looking at photovoltaic solar cell production I saw that there was some difficulty with rare earth minerals used in the production but i can't find which rare earth minerals. I have tried ...
- 53
2
votes
3
answers
2k
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How absorption coefficient determines which material is used to make solar cells?
Does the knowledge of the material absorption coefficients aids engineers in determining which material to use in their solar cell designs? If yes, how?
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