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Questions on obtaining electrical energy from the light of the Sun through either direct photovoltaic conversion or thermal conversion.

1
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0answers
The CBS News article Expedition Antarctica: A father and son's journey to save the planet says (in part): The success of the expedition necessitated the pioneering of new equipment that would use …
asked Aug 25 '18 by uhoh
3
votes
2answers
A spacecraft in low inclination LEO will undergo regular eclipsing of the Sun and this is a big issue for power management. How fast is the light-to-dark transition, say 90% to 10% sunlight intensity …
asked Mar 24 '18 by uhoh
1
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1answer
@Hobbes' answer mentions that Deep Space 1 used special refractive solar concentrators attached to photovoltaic cells. According to SCARLET: The innovative array uses 720 lenses to focus sunligh …
asked Feb 10 by uhoh
3
votes
1answer
Since the shape (as well as the integral) of the solar irradiance spectrum above the atmosphere is different than that below it, is the efficiency of photovoltaic solar panels defined and measured dif …
asked Aug 15 '16 by uhoh
7
votes
1answer
I've noticed that in various photos and videos the orientation of the ISS' eight independent solar arrays are often moving, and usually some are different than others. 0th-order naive thinking would …
asked Nov 25 '17 by uhoh
7
votes
2answers
The upcoming SpaceX launch with the apparently first re-use of a dragon capsule will bring with it the Roll Out Solar Array (ROSA). (See also: More science, reused Dragon capsule featured on CRS-11) …
asked Jun 1 '17 by uhoh
4
votes
1answer
Clicking through NASA.spinoff.gov I came to the page for spinnoff 2001 Glenn Research Center and found this: Glenn Research Center's sapphire refractive secondary concentrator will be used with pr …
asked Aug 22 '18 by uhoh
0
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0answers
I thought I had asked this question before, but I can't find it now so I will ask here. I have asked a related question in Physics SE: Do III-V based photovoltaics “glow” (photo-luminesce) when illum …
asked Jan 20 by uhoh
3
votes
2answers
The efficiency of photovoltaic cells is surprisingly strong function of junction temperature. Hotter usually means lower efficiency. If one searches for example for images and sites tagged with "float …
asked Jul 21 '16 by uhoh
2
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0answers
This comment says Lower orbit also mean shorter ones; for observations (one of the ISS missions) it is an advantage. It also have shorter night times (ie smaller batteries).. and the likely thi …
asked Aug 27 '18 by uhoh
3
votes
1answer
Now that the protests at Kourou Space Center in French Guiana are over, Arianne has launched both EutelSat 172B and ViaSat-2 as 2017-029A. While EutelSat 172B has a photovoltaic power of about 13 kW, …
asked Jun 2 '17 by uhoh
1
vote
1answer
The NYTimes article Review: ‘Bill Nye: Science Guy,’ a Portrait of a Fighter for Facts includes a link to the film's trailer on YouTube and a photo of Bill Nye with a model of a 3U cubesat attached to …
asked Oct 28 '17 by uhoh
5
votes
2answers
This solar panel is closer to square than most solar panels I've seen, which tend to be very long - length/width ratio perhaps 4 to 6. This looks like only 1.5, and it seems to be located at the end o …
asked Apr 17 '17 by uhoh
1
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2answers
On earth, the photovoltaic cell junction for mass production tends to be just silicon, although there is a variety of material types - single crystal vs multicrystal or polycrystal, or even amorphous. …
asked Jul 21 '16 by uhoh
1
vote
1answer
The question How long will a 500 km altitude satellite spend in Earth - shade per orbit has several answers, and there is some discussion of constraints related to maximum eclipse, due to some issues …
asked Mar 25 '18 by uhoh

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