Originally Posted by swampu
I wonder if you could take off the shelf componets and build a engine (genset) driven cold plate. Compressor, lines, fab a stainless box with copper coils (expansion) and voila.
Yes, it is pretty simple. I have built a couple in the past. My last one kept me in ice all over the South Pacific. I ran the main 30 min. in the am and the pm.. also ran double alternators at the same time. It worked flawlessly for four years until I sold the boat.
I use the Sanden 505 wobble plate compressor (one of the most popular) it has a 12v clutch and is available at junk yards cheap.
build a cold plate from a restaurant serving tray, add copper coil for freon line, gasket and bolt together tray ( I TIG welded mine). weld ss coupling to top for fill port,
buy or build (I built a s.steel tube in tube) condenser.
add a copper line,sight glass, filter, expansion tank, adjustable thermostat to control 12v to clutch, and a super heat expansion valve.
You used to be able to get most the stuff at rparts.. minus the compressor.
Engine drive units work really well and pump out a lot of cold (remove heat actually).
I plan to build another one and possibly add it to the inside of the refer on my boat... but I may just build my own custom refer freezer.. have not figured it out yet.
I think Nigel Calder has a section in his book about engine drive systems.