Questions tagged [solar-power]

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

12 questions with no upvoted or accepted answers
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7
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Were solar concentrators on HS-702 just a stop-gap measure until triple-junction PV cells were available?

According to Gunter's Space Page discussion of early versions of the Hughes HS-702 Bus: The first version of the 702 used solar arrays with concentrators. These concentrators tended to early ...
5
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0answers
179 views

Low energy cements for Mars and Callisto. Waterless cement for the Moon. Any good candidates?

In the non-polar regions of the Moon and Mercury there is a shortage of volatiles, including hydrogen and nitrogen, so they might be regaded as too valuable to be "wasted" to prepare concrete. ...
5
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1answer
1k views

What limits thrust-to-weight ratio of ion thusters?

If we consider nuclear-rocket technology not feasible (whether due to technological or political limitations), the second best options for future transportation in solar system are perhaps solar-...
4
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78 views

Have inflatable solar arrays ever been used in practice?

Was trying to find some "experimental" solar panel designs, and came across a rather fascinating design idea, inflatable solar panels. I feel like something this compact would work stupendously for a ...
3
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0answers
52 views

What are the tradeoffs of circularly unfurling solar panel over linearly deploying solar panels?

Martian landers like Phoenix and Insight uses circularly unfurling solar panels. The regular satellites make use of linearly unfurling panels. What are the primary reasons why linear unfurling ...
3
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1answer
138 views

Is solar panel efficiency defined and measured differently for space vs terrestrial applications?

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 ...
2
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0answers
67 views

Why do the two Apollo 11 PSEP solar panels appear to have different backing materials?

The PSEP (Passive Seismic Experiment Package) was powered by a pair of solar panels mounted on extended arms. The one on the left (when looking towards the LEM) appears to have a matt grey backing: ...
2
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0answers
68 views

Would a lower LEO ISS orbit really have a shorter eclipse duration than a higher one?

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 ...
1
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0answers
88 views

What technology assistance did NASA give to hikers to the South Pole using renewables-only?

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 ...
1
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164 views

How to size Solar Array for Mars Surface

Good morning everyone, I am working on a project for my university where we need to perform a PrePhase A study for a Mars Infrastructure for Propellant production as a means of support for future ...
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25 views

Has direct bandgap photoemission from III-V solar panels on spacecraft ever been detected or reported?

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 ...
-2
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1answer
67 views

'Space Transit Habitat' source(s) of energy

What are the sources of energy for a Space Transit Habitat(manned) in terms of both propulsion( after passing over the Low Earth Orbit) and required electric facilities)through a 6-8 month voyage to ...