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- Newsgroups: sci.environment
- Path: sparky!uunet!stanford.edu!CSD-NewsHost.Stanford.EDU!CSD-NewsHost!jmc
- From: jmc@SAIL.Stanford.EDU (John McCarthy)
- Subject: Re: Enviro-industry on ABC
- In-Reply-To: gary@ke4zv.uucp's message of 21 Dec 92 16:43:25 GMT
- Message-ID: <JMC.92Dec21173231@SAIL.Stanford.EDU>
- Sender: news@CSD-NewsHost.Stanford.EDU
- Reply-To: jmc@cs.Stanford.EDU
- Organization: Computer Science Department, Stanford University
- References: <1992Dec16.183228.13812@vexcel.com> <1992Dec16.192912.473@nsisrv.gsfc.nasa.gov>
- <1gofcoINNik@gap.caltech.edu> <JMC.92Dec16171212@SAIL.Stanford.EDU>
- <1992Dec21.164325.9562@ke4zv.uucp>
- Date: 21 Dec 92 17:32:31
- Lines: 29
-
- In article <1992Dec21.164325.9562@ke4zv.uucp> gary@ke4zv.uucp (Gary Coffman) writes:
-
- In article <JMC.92Dec16171212@SAIL.Stanford.EDU> jmc@cs.Stanford.EDU writes:
- >Isn't the longest electric transmission line the intertie between
- >the Pacific Northwest and Southern California extending 1500 miles?
- >However, only a small amount of Southern California's electricity
- >comes over this line. Does anyone know what fraction of the power
- >is lost to resistance?
-
- This was hashed out over in sci.energy a couple of months ago. If
- you design for a maximum loss of 10%, the cable requirement is really
- quite modest, about the diameter of your arm for a transcontinental
- EHV cable with a 1000 MWe carrying capacity.
-
- Gary
-
- 1000MWe is about one big power plant. A situation in which one part
- of the country is supplying another part of the country with a substantial
- part of its electricity requirements would require at least 10 times that
- capacity.
-
- What voltage was assumed? I assume the transmission was taken to be dc.
- Are there any losses other than resistive, e.g. ionization losses from
- the very high voltage?
- --
- John McCarthy, Computer Science Department, Stanford, CA 94305
- *
- He who refuses to do arithmetic is doomed to talk nonsense.
-
-