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- From: ems@michael.apple.com (E. Michael Smith)
- Subject: Re: More External-Combustion Info
- Message-ID: <1992Nov20.184121.19163@michael.apple.com>
- Organization: Apple Computer Inc, Cupertino, CA
- References: <1992Nov17.071642.22601@leland.Stanford.EDU> <1992Nov17.180135.25760@kakwa.ucs.ualberta.ca> <1992Nov19.231853.15777@grebyn.com>
- Date: Fri, 20 Nov 1992 18:41:21 GMT
- Lines: 35
-
- In article <1992Nov19.231853.15777@grebyn.com> sgs@grebyn.com (Stephen G. Smith) writes:
- >In article <1992Nov17.180135.25760@kakwa.ucs.ualberta.ca> sherwood@space.ualberta.ca (Sherwood Botsford) writes:
- >>3. Given a closed system is there a better choice of working fluid than
- >>water (Something that wouldn't freeze, and could act as a lubricant.)
-
- >The reason for using water is its very high heat of vaporization --
- ...
- >Water is also cheap, nontoxic, nonflammable,
- >has halfway reasonable boiling and freezing points, and doesn't
- >decompose at high temperatures.
-
- Hmmm. Sounds like a refrigerant. So why not also look at the
- other stuff used as refrigerants? Yes, some of them are toxic
- or flamable, but at the small quantity levels needed that should
- be acceptable. (Look, if I've got 15 gallons of gasoline in my
- car today, I think I could accept 1 pint of flamable working fluid
- of similar toxicity. {don't try inhaling 1 pint of gasoline fumes...})
-
- >I seem to remember that there are a couple of CFCs that are almost as
- >good as water (Hey! Put that down! OUCH! :-) but not much else.
-
- What about: NH3, SO2, Propane, Pentane, Hexane {& etc.}, HCFCs,
- HCFs, and most anything else with a fair number of hydrogen bonds
- and a reasonably inert to metal chemistry?
-
- Why can't you make an ammonia turbine? Or a Hexane turbine?
-
- --
-
- E. Michael Smith ems@apple.COM
-
- 'Whatever you can do, or dream you can, begin it. Boldness has
- genius, power and magic in it.' - Goethe
-
- I am not responsible nor is anyone else. Everything is disclaimed.
-