Questions tagged [solar-power]

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

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5
votes
1answer
298 views

Is utilizing the high temperature for chemical reactions on Venus a feasible way of generating electricity?

I assume utilizing habitats floating high in the Venus atmosphere as described by Geoffrey Landis. So weight, size etc is a constraint, and we will not be operating at the surface with the crushing ...
8
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1answer
264 views

Does Juno use MPPT?

MPPT aka Maximum Power Point Tracking is an active mechanism to collect maximum power a PV cell may deliver. This is typically achieved by varying the resistive load connected to a cell. Juno will ...
9
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3answers
3k views

How will Dragon v2's solar panels be protected during launch on top of Falcon 9?

When Elon Musk unveiled Dragon v2 last year, we got our first truly good look at what SpaceX's crew vehicle is like. Apart from the ability to propulsively land, one of the big changes was the lack of ...
8
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1answer
587 views

What is the difference in solar panel efficiency between Solar Impulse & ISS?

Solar Impulse is on target to circle the world. Presumably Solar Impulse has the most current and efficient solar cells available, while those on the ISS range between 5 and 10 years old. How do the ...
4
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1answer
180 views

Were the ISS Solar Arrays manufactured as a set?

The solar arrays used on the ISS were launched in 4 different launches. Starting in 2000 for the first array, used on the Z-0 truss, to 2007, 2008, and 2009 for the final three. Are all 4 of them ...
3
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1answer
363 views

Is the waste heat (sink) system dependent on whether the energy source is nuclear or solar?

A power plant in space causes waste heat which has to be removed from the plant. The need for large heat sinks, and their mass, kind of bogs down some of the advantages of big nuclear power in space. ...
3
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2answers
324 views

What are low-mass ways of supplying power for a 4.5kW ion thruster?

I'm in the process of designing a spacecraft for a project, and I'm at the stage of choosing the propulsion system. I'm going to use a Boeing 702 ion thruster (requiring 4.5kW) for propulsion, to ...
8
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2answers
2k views

Solar flux on (not at) Earth

I'm trying to find out if there are reliable values for the solar flux received on Earth. I realise this will change with location, time of day, season, weather etc. but I'm surprised that I can find ...
10
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1answer
338 views

Why does DSCOVR appear to be missing solar cells?

In recent photos of DSCOVR I've noticed it appears to be missing eight solar cells in its array. In photos from the original "unboxing" from storage it appears to have all its cells. Why is this?
18
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2answers
3k views

How far from the Sun can solar power be used as a reliable energy source?

Space probes headed for the far reaches of our Solar System rely on radioisotope thermoelectric generators for power (Cassini–Huygens, Voyager 1, Voyager 2). Presumably this is because solar power ...
7
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2answers
841 views

Why aren't landers designed to point their solar panels and radio antennas to Sun and Earth?

Opportunity, the rover on Mars, is on its tenth year. Wow! But its solar panels are fixed flat on top of it. As are those of all interplanetary landers which I know of. Why aren't they designed to ...
5
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1answer
220 views

Would it be practical to use a rover with a cable to a power and communication station?

Geology Dr. Paul Spudis (who was on the Clementine Lunar orbiter mission) has an interesting step-by-step proposal for exploration of potentially extractable water ice at the Lunar poles. It includes ...
6
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1answer
624 views

Could a solar thermopile be enough to power a small satellite?

It seems that a nuclear thermoelectric generator was used to power spacecrafts for some exploration missions. Can a thermopile that harvest the light/shade temperature difference on Earth's orbit be ...
15
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1answer
331 views

How long could Solar Impulse fly in the Venerean atmosphere?

Extremes of temperature, and pressure serve to effectively constrict the life-span of a PV cell on the Venerean surface. Despite the cloud cover, the Venus' proximity to Sol makes for upto 1km ...
10
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1answer
1k views

What is the average intensity of sunlight on the Venerean surface?

A follow-up to How much more power does a PV cell generate in Venerean orbit? NASA writes to say about Venera 8 ... measured the light level as being suitable for surface photography, finding it ...
8
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1answer
847 views

How much more power does a PV cell generate in Venerean orbit?

Spacecraft in terrestrial Solar System typically use PV cells to power their instruments. As the referenced Wikipedia article writes, Photovoltaics (PV) is a method of generating electrical power ...

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