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- Path: sparky!uunet!zaphod.mps.ohio-state.edu!magnus.acs.ohio-state.edu!usenet.ins.cwru.edu!ukma!seismo!skadi!stead
- From: stead@skadi.CSS.GOV (Richard Stead)
- Newsgroups: sci.energy
- Subject: Re: Energy Ideas -- Solar Power
- Message-ID: <51734@seismo.CSS.GOV>
- Date: 1 Jan 93 21:16:47 GMT
- References: <1466300121@igc.apc.org> <1466300125@igc.apc.org>
- Sender: usenet@seismo.CSS.GOV
- Lines: 47
- Nntp-Posting-Host: skadi.css.gov
-
- In article <1466300125@igc.apc.org>, ei@igc.apc.org (Essential Information) writes:
- > Other factors make the benefits of solar power more attractive.
- > Boilers in many buildings must run throughout the year just to heat
- > water for washing. The operation of the boiler during summer
- > months adds heat inside the building where it is not needed. This
- > heat must be cooled by the air conditioning system. Solar heating,
- > which uses heat from the outside of the building, does not add to
- > the interior cooling load. Thus, avoided Heating, Ventilation, and
- > Air Conditioning (HVAC) costs should be incorporated into the
- > life-cycle cost analysis when considering a solar heating system.
-
- I don't agree with this. It seems like well-designed solar systems
- are being compared to poorly-designed boiler systems. A good boiler
- system would be well-insulated and properly vented so that it does
- not heat the building (unless that is desired). I think solar
- heating for hot water would still probably beat the boiler, so
- there is no need to consider the HVAC costs. One problem with
- solar hot water systems that isn't mentioned here, is the need to
- store the heat. This has been done by melting certain substances
- (I think sodium sulfate decahydrate has been used, for example).
- By storing the heat, people can have hot water in the morning (when there
- is large demand).
-
- > WATER DISTILLATION AND PURIFICATION ACHIEVED WITH SOLAR POWER
- >
- > Solar stills create a continuous gentle steaming of water which is
- > then trapped and allowed to condense. The conventional method,
- > boiling water and condensing it, requires eight gallons of water to
- > provide one gallon of purified water, while solar stills provide
- > one gallon of purified water from just over one gallon of water.
-
- Again, I see no need to compare well-designed solar equipment to
- poorly-designed non-solar equipment. The solar still would operate
- just fine with another thermal source than solar. The main point
- here is not having to provide another thermal source. The solar
- option would win out over any other distillation option without
- the need to mix in a comparison of bad and good designs. Solar
- should be compared to the other energy sources - basically, it
- will win as long as sufficient sun is available to keep the total
- equipment cost low enough.
-
-
- --
- Richard Stead
- Center for Seismic Studies
- Arlington, VA
- stead@seismo.css.gov
-