You say why not. I say why?
Absorption units are made and used today. The bigger ones I have worked on
were Ammonia for the medium. Most techs and contractors tend to stay way
from absorbers. Keeping the fire at a constant state would not be a
challenge that I would care for.
Servel still makes RV refrigerators that run on Tri-fuel.
My first house in Phoenix had an absorber. It leaked and killed all of the
shrubs on that end of the house. Thank god our bedroom was on the other side
of the house. Out of all of the a/c contractors in the Valley, just 2 would
work on it in the beginning. When the techs retired no one would touch it.
How constant does it have to be? I've burned wood in wood burning stoves,
in smokers, and kept the temperature within 25 degrees each way over a
period of hours. Using a pelletized or ground wood mass and auger, it can
be held even closer. That, of course, needs electricity that may not be
My guess is the market for wood fired AC is very small.
25 degrees is a big difference to a refrigeration cycle.
I am sure I could write a PLC program and automate the cycle for better
control than 25 degrees. The cost of the controls, sensors, and all of the
related wiring is just not worth the effort.
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