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From: Pat Flannery on 18 Dec 2009 14:16 Greg D. Moore (Strider) wrote: > > The one I'm hearing more and more about is compressed air. Not a panacea, > but apparently may be quite workable in many cases for peak power loads. Huge air tanks if you want to run anything major off of it for any length of time...God help you if one ruptures, as it will take the whole building out. Pat
From: Pat Flannery on 18 Dec 2009 14:27 Alain Fournier wrote: > Well 24/7 safe for two short periods in the year (twice 20 minutes if > I recall correctly) http://www.nss.org/settlement/ssp/library/2002-SPSRecentDevelopments.pdf "Because the Earth's axis tilts 23� from the plane of the ecliptic, the satellites would pass either above or below the Earth's shadow except during the spring and fall equinox periods. During the 22 days prior to equinox, the satellite would experience a lengthening daily period of eclipse to a maximum of 72 minutes. The period of eclipse would then fall during the 22 days following equinox. The eclipse period occurs near local midnight when energy demand is at a minimum. The equinox eclipses will result in about a 1% decrease in the amount of solar radiation reaching the Solar Power Satellite and hence a 1% scheduled outage rate during the year." Though not necessarily a show-stopper, this is extremely inconvenient. Pat
From: Greg D. Moore (Strider) on 18 Dec 2009 13:42 "Pat Flannery" <flanner(a)daktel.com> wrote in message news:brSdndnfoP9yJbbWnZ2dnUVZ_jNi4p2d(a)posted.northdakotatelephone... > Greg D. Moore (Strider) wrote: >> >> The one I'm hearing more and more about is compressed air. Not a >> panacea, but apparently may be quite workable in many cases for peak >> power loads. > > Huge air tanks if you want to run anything major off of it for any length > of time...God help you if one ruptures, as it will take the whole building > out. > > Pat
From: Alain Fournier on 18 Dec 2009 13:42 Pat Flannery wrote: > Alain Fournier wrote: > >> Well 24/7 safe for two short periods in the year (twice 20 minutes if >> I recall correctly) > > > http://www.nss.org/settlement/ssp/library/2002-SPSRecentDevelopments.pdf > > "Because the Earth's axis tilts 23� from the plane of the ecliptic, the > satellites would pass either above or below the > Earth's shadow except during the spring and fall equinox periods. During > the 22 days prior to equinox, the satellite > would experience a lengthening daily period of eclipse to a maximum of > 72 minutes. The period of eclipse would then > fall during the 22 days following equinox. The eclipse period occurs > near local midnight when energy demand is at a > minimum. The equinox eclipses will result in about a 1% decrease in the > amount of solar radiation reaching the Solar > Power Satellite and hence a 1% scheduled outage rate during the year." Thanks for the info. I thought it was much less than that. > Though not necessarily a show-stopper, this is extremely inconvenient. I agree. Alain Fournier
From: Greg D. Moore (Strider) on 18 Dec 2009 13:44
"Pat Flannery" <flanner(a)daktel.com> wrote in message news:brSdndnfoP9yJbbWnZ2dnUVZ_jNi4p2d(a)posted.northdakotatelephone... > Greg D. Moore (Strider) wrote: >> >> The one I'm hearing more and more about is compressed air. Not a >> panacea, but apparently may be quite workable in many cases for peak >> power loads. > > Huge air tanks if you want to run anything major off of it for any length > of time...God help you if one ruptures, as it will take the whole building > out. Don't think tanks, think sealed, underground caverns (for one option) http://en.wikipedia.org/wiki/Compressed-air_energy_storage > > Pat -- Greg Moore Ask me about lily, an RPI based CMC. |