The Dometic Refrigerators used in the TM have no moving parts, no compressor, etc. The process uses heat to change a mixture of liquid ammonia and hydrogen gas into ammonia and hydrogen gas. The selection of 12 VDC, AC, or propane denotes the source to heat the boiler.
The components of the Dometic are as follows: boiler, pump, seperator, condensor, evaporator, gas temperature exchanger, absorber, absorber vessel, liquid temperator exchanger.
1. The system is charged with hydrogen gas. The boiler, using ammonia, hydrogen, liquid solution condenses ammonia liquid to a gas.
2. The gas, containing vapor, rises from the boiler to the separator, where the vapor is removed.
3. The gas then passes through the condensor and cools into a liquid.
4. The liquid flows through the hydrogen filled evaporator.
5. The evaporation of the ammonia extracts heat from the refrigerator compartment to provide cooling.
6. The solution of ammonia and hydrogen passes on to the absorber.
7. The solution and vapor are returned to the absorber mix with ammonia gas and back to the boiler to repeat the continuous absorbtion cooling cycle.
For an animated display of the above process, go to the following website.
http://www.dometicusa.com/products/r...absorption.swf