Those ammonia cycle refrigerators are pretty common in RVs and campers. ----- Original Message ----- From: "Kurt Jacobson" <kurtcjacob...@gmail.com> To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> Sent: Monday, April 10, 2017 12:23:20 PM Subject: Re: [Emc-users] Way OT, Unexpected Result from Refrigerator
> > I am impressed that someone managed to come up with this cycle: > http://www.cs.cmu.edu/~mnr/fridge.html We used to see quite a few ammonia cycle based refrigerators and central air conditioning units down here in the south (Georgia), but they are becoming scarce now. They were generally reliable and very economical to run, although some of the cheaper units had problems with corrosion in the coils causing them to fail. I was interested in the cycle and as a project for an advanced thermodynamics class I did a detailed analysts of if it with operation cost comparisons etc. As I recall it came out making compressor based systems look very undesirable from an operating cost standpoint. The funny thing is that the power company was offering rebates to people to encourage them to replace there "inefficient" natural gas powered refrigeration systems. Now they are offering rebates to replace "inefficient" gas furnaces with heat-pumps. I think I see a pattern... Cheers, Kurt On Mon, Apr 10, 2017 at 12:00 PM, andy pugh <bodge...@gmail.com> wrote: > On 10 April 2017 at 16:37, Jon Elson <el...@pico-systems.com> wrote: > > If the condenser pressure is too > > low, you won't get any liquid at all, and the Carnot process > > turns into a really ineffective Brayton (all gas) process. > > I am impressed that someone managed to come up with this cycle: > http://www.cs.cmu.edu/~mnr/fridge.html > > > -- > atp > "A motorcycle is a bicycle with a pandemonium attachment and is > designed for the especial use of mechanical geniuses, daredevils and > lunatics." > — George Fitch, Atlanta Constitution Newspaper, 1916 > > ------------------------------------------------------------ > ------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
