Fridge not cooling

jato, do you still think its much different on propane than 120V? Reason I ask is that its been up and down in temp while on propane as the outside temp has varied. Once you get a feel for how it is on propane over the next couple of days you might want to go back on electric and see if it is really any different. 

The difference between gas and electric temps seems like its kinda in the noise. What were the outdoor temps at 6am and in the hottest part of the day? 

Ok so the ambient temps are varying by about 25 degrees morning to afternoon and the fridge temps are changing by about 15 degrees, And there is really only about a degree or so difference between gas and electric.

Originally posted by jato I have been told that the electric mixer valve may be faulty, that when I turn up the call for colder temps, (eg. - from 3 to 4 bars or 4 to 5 bars) that I should observe a larger flame which will produce more heat to cook the ammonia more vigorously giving me a colder temp.  When I went from 4 to 5 bars I did not observe a larger flame, it appeared to my eyes the same size.   Is that true, have you observed a larger flame when doing this?

When I looked at the free piston stirling coolers before it looked like their COP's were roughly in line with the Danfoss vapoor compression refrigeration units, maybe not quite as good. So, they're going to us a similar amount of energy to do the same work or a bit more. But the FPSC's are capable of reaching much colder temps, so they're really good for the "last mile" for vaccine cold chain distribution to remote clinics, etc. For use in mobile food refrigeration like in RV's the Danfoss units are maybe a bit more efficient and a lot cheaper.  Either one though consumes a lot of our very limited supply of electricity though so propane is generally a better solution for our purposes, even though the COP's of absorption fridges are really bad. Doesn't matter 'cause 5 gallons of propane contains the same energy as 100 golf cart batteries.