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- Newsgroups: sci.space
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!darwin.sura.net!udel!rochester!rocksanne!news
- From: kirby@xerox.com (Mike Kirby)
- Subject: Re: Justification for the Space Program
- Message-ID: <1993Jan8.201351.6557@spectrum.xerox.com>
- Sender: news@spectrum.xerox.com
- Reply-To: kirby@xerox.com
- Organization: Xerox Corporation, Webster NY
- References: <1993Jan8.190043.24897@cs.rochester.edu>
- Date: Fri, 8 Jan 1993 20:13:51 GMT
- Lines: 43
-
- In article 24897@cs.rochester.edu, dietz@cs.rochester.edu (Paul Dietz) writes:
- >In article <jfelder-080193105134@latvia.lerc.nasa.gov> jfelder@lerc.nasa.gov (James L. Felder) writes:
- >
- >
- >
- >
- >> No, to unreliable. Terrestrial solar energy has a problem because of
- >> intermittent illumination. Either a large storage capacity must be
- >> included in the system, or another source must come on-line at night and
- >> during periods of cloud cover. The large required land area makes solar
- >> problematic for large portion of the world. Plus places like Cleveland
- >> goes days or weeks with hardly a glimpse of the sun.
- >
- >Surely, means to move energy in both time and space would be needed.
- >There are serious economic limits on this today, but there is no
- >reason to think these limits cannot be extended.
- >
- >As for land area: current world energy use is only 1/10,000 of the
- >sunlight hitting earth's surface. Restricting ourselves to
- >continents, and assuming a 20% efficieny, we end up using a couple of
- >percent of the land area of the planet.
- >
- >
-
- Of course, what is the ecological effect of covering 1% of the earth's
- land mass? Unless it is a distributed grid (i.e. everyong has their
- own solar panel on their roof) I would assume that solar collection would
- be located centrally. This would require large tracks of land and would
- effectively kill anything on the land. Bright sunny areas like deserts would
- be ideal for such facilities, of course these deserst also support ecologies that
- depend very heavily on the sun.
-
- Nuclear is a much better solution as long as the political ramifications are
- handled effectively. I am not encouraged though.
-
- >
- > Paul F. Dietz
- > dietz@cs.rochester.edu
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