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powersats (was Bush and VSE)
On Jun 23, 11:49 pm, (Henry Spencer) wrote:
In article . com, kert wrote: Does anyone know if any thin-film cells have been ever used or tested in space environment yet ? There have been some tests, although I don't believe I've seen results (not that I've really gone looking). There's been no operational use that I know of, yet. People have long been interested in them for space applications, because although their efficiency is lower than crystalline cells, they (and their supporting substrate) can be made much thinner and lighter, which promises more power per kilogram. Hence the interest in testing them. So my next question is, wtf are they doing flying ants and seeds to the ISS ? Isnt ISS there for exactly these purposes ? -kert |
#142
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powersats (was Bush and VSE)
On Jun 25, 1:24 pm, kert wrote:
On Jun 23, 11:49 pm, (Henry Spencer) wrote: In article . com, kert wrote: Does anyone know if any thin-film cells have been ever used or tested in space environment yet ? There have been some tests, although I don't believe I've seen results (not that I've really gone looking). There's been no operational use that I know of, yet. People have long been interested in them for space applications, because although their efficiency is lower than crystalline cells, they (and their supporting substrate) can be made much thinner and lighter, which promises more power per kilogram. Hence the interest in testing them. So my next question is, wtf are they doing flying ants and seeds to the ISS ? Isnt ISS there for exactly these purposes ? -kert oops, scratch that. there was a Forward Technology Solar Cell Experiment (FTSCE) flown as part of MISSE-5 exposed materials experiment. http://www.nasa.gov/mission_pages/st...E_feature.html http://www.grc.nasa.gov/WWW/RT/2004/...krasowski.html However, the results are not published, as of yet anyway, http://misse5.larc.nasa.gov/ and they dont provide much data on what kind of cells were flown and whether those are commercially available or not. -kert |
#143
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powersats (was Bush and VSE)
On Jun 23, 11:49 pm, (Henry Spencer) wrote:
In article . com, kert wrote: Does anyone know if any thin-film cells have been ever used or tested in space environment yet ? There have been some tests, although I don't believe I've seen results (not that I've really gone looking). There's been no operational use that I know of, yet. People have long been interested in them for space applications, because although their efficiency is lower than crystalline cells, they (and their supporting substrate) can be made much thinner and lighter, which promises more power per kilogram. Hence the interest in testing them. -- spsystems.net is temporarily off the air; | Henry Spencer mail to henry at zoo.utoronto.ca instead. | just to reply to my own question, some googling turned up a bit of data. MISSE-5/FTSCE indeed flew two different types of thin-film cells, these papers outline it http://scholar.google.com/scholar?q=walters+ftsce The samples tested were by Iowa Thin Film, Spectrolab and Emcore. Apparently, the results were quite positive and both SpectroLab and Emcore are touting their products as the future for spacecraft. What remains to be done is testing actual array ( thes FTSCE experiments were just cell level & material degradation tests ), its deployment and powering the entire spacecraft. -kert |
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