Refrigerants, Wide range EGO and other thoughts.

[Raymond C Drouillard]

Would you need a gallon?  Anyhow, they have been using ammonia cycle
coolers in houses and motor homes for a long time.  Most of the house
units are gone (replaced by freon), but there are still a few travelling
the roads or stuck in cabins.


On Tue, 5 May 1998 13:58:40 +0800 Dan Zorde <dzorde at soanar.com.au>
writes:
>Just place a Hazchem sticker on your car, and hope you don't have an
accident. 
> I'm sure the EPA would have a few things to say after a gallon or so of

>ammonium have spilt all over the road and knocked out any nearby
witnesses. 
> Would look spectacular but.
>
>Dan	dzorde at soanar.com.au
>
>-----Original Message-----
>From:	steve ravet [SMTP:steve at sun4c409.imes.com]
>Sent:	Monday, 04 May, 1998 9:24 PM
>To:	diy_efi at efi332.eng.ohio-state.edu
>Subject:	Re: Refrigerants, Wide range EGO and other thoughts.
>
>Thor Johnson wrote:
>>
>> > Refrigerants
>> >
>> > Sounds like someone is trying to adapt the ammonia  absorption
>> cycle
>> > refrigeration system to use as an intercooler.  What is
>> interesting is that
>> > although this cycle is less "efficient" at cooling  than a
>> compressed gas
>> > cycle, it gets it's pumping energy from heat - in the  case of
>> a propane RV
>> > refrigerator from a small propane flame, or in this  case from
>> the waste heat
>> > of the exhaust.  The problem is probably the exhaust
>> temperatures raise the
>> > ammonia/water solution past the efficient working  range and
>> the gentleman is
>> > looking for another absorption cycle fluid that will work in
>> this range.
>>
>> You have any good sources of info on the ammonia cycle?  I'm a
>> nuts&bolts guy who would like to build one for the heck of it....
>> (An EE that likes to play with the ME's toys ;).
>
>Get on Deja News, and do a search on ammonia refrigerators.  You'll 
>come
>up with a lot of posts in rec.boating of all places, including one 
>that
>explains ammonia fridges in detail.  The author's name is Rod McInnis.
>A mixture of water and ammonia is heated in a column.  Because of
>different boiling points, one end of the column is mostly ammonia, the
>other end is mostly water.  The two are separated, and pumped into the
>fridge.  When water and ammonia mix, the temperature of the mix goes 
>way
>down.  It's a physical process, not a chemical one, that I cannot
>remember the name of right now.  The mixture never changes pressure, 
>so
>there is no compresor.  The only energy input is a flame or electric
>heat to boil the mixture.  In an RV, there isn't even a pump, the 
>system
>is cleverly designed so that the gravity causes the mixture to
>circulate.  That won't work in a car with lateral G forces, but 
>there's
>no reason why you couldn't add a small pump to circulate the mixture.
>It's been mentioned before here, it seems like it would be a good way 
>to
>use exhaust heat to cool the incoming mixture.  The only thing is that
>the ammonia mixture is very stong (poisonous), much stronger than
>cleaning products.
>
>--steve
>
>>
>> TIA,
>> -Thor Johnson
>> thormj at iname.com
>
>--
>Steve Ravet
>International Meta Systems
>http://www.imes.com
>steve at imes.com
>
>

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