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- Newsgroups: rec.autos
- Path: sparky!uunet!munnari.oz.au!mtiame!iconix!iconix.oz.au!mwp
- From: mwp@iconix.oz.au (Michael Paddon)
- Subject: Re: Rotary vs. Piston Engines
- Message-ID: <mwp.722333620@iconix.oz.au>
- Sender: news@iconix.oz.au (USENET)
- Nntp-Posting-Host: titanic
- Organization: Iconix Pty Ltd (World Headquarters)
- References: <1992Nov12.014944.26797@walter.bellcore.com> <184132@pyramid.pyramid.com> <1dut97INNjb5@usenet.INS.CWRU.Edu>
- Date: Sat, 21 Nov 1992 08:13:40 GMT
- Lines: 40
-
- In <1dut97INNjb5@usenet.INS.CWRU.Edu> aas7@po.CWRU.Edu (Andrew A. Spencer) writes:
- >In a previous article, ramiro@rrunner.NoSubdomain.NoDomain (Ramiro Reinoso) says:
- >
- >>Rotrary engines might be used more ofter in the future.
- >>Rotary engines may be the answer to future hydrogen engines.
- >>I saw a display at the last New York auto show of a hydrogen tank
- >>for cars. They have demonstrated that rotary engines are more
- >>suitable for hydrogen fuel because the combustion chamber section
- >>was not the same as the intake chamber section. The rotor takes
- >>the mix and move it to another section to be burnt. This results
- >>in a cooler intake chamber that prevents hydrogen from exploding.
- >>
- >>And as far as emissions, when you burn hydrogen you end up with
- >>water vapor (very environmentally friendly).
- >>
- >with some various complications...it sounds great..but..you have to inject
- >water into the combustion chamber in order to keep certain nasties like
- >nitrogen(NOx's) mostly from also deciding to steal some of the H's O's...
- >it sounds realy great..but..not only would we have to come up with tanks
- >practicle for a car to carry H..but also tote around water(though not to
- >the extent of petrol we do now!)..althought a system might be devised so
- >that the vapor from the tailpipe(once perpetuated with reserve h2o) could
- >be recondensed and injected into the motor....well..nothing's ever as simple
- >as it's theory would suggest!.
-
- My understanding is that hydrogen can be safely stored as metallic
- hydrides, with the gas released (electrical reaction? chemical? I
- don't know) only as needed for combustion.
-
- The resulting water would be vapour at exhaust temperatures; ie. no
- we wouldn't have to "tote" it around.
-
- The biggest problem, I imagine, would be that the seals still require
- lubrication. This must inevitably introduce some lubricant (presumably
- oil) into the combustion chamber, in turn causing some kind of
- noxious emissions (no where near the extent of current engines, of course).
- This does mean, however, that an H powered rotary will never quite meet
- a true zero emission requirement.
-
- Michael
-