Originally Posted by Martin S
What's your experience of using water cooled condensers. I am considering the ISOTHERM
range. Currently I have an aircooled condenser it seems very inefficient and has the additional problem warms up the already warm cabin.
Replacing looks reasonably straight forward. I'd love to hear from otehrs who have tackled this. Thanks...
The previous owner of our boat spent 15 years in the Bahamas
and S America.
They replaced the main refrigerator
compressor set-up to one with both fan and optional water cooling.
They installed the water recirculation pump with an on/off switch and separate hour meter, and plumbed it to one of the 2 potable water tanks
to eliminate raw water
cooling concerns. [The boat has 2- 110 gallon water tanks
and a water maker.]
Since that compressor can be air or water cooled, and each have a separate hour meter, it was easy to quantify the efficiency gains comparing run times of water vs. air cooled [30+% based upon 2 years of data in the same region where Cooling Degree Days
in the warm seasons average mid 3 figures. i.e., the higher the number, the more cooling needed to reach your desired cabin temperature. Likewise re: heating
Note that the boat is also air conditioned, but that was only as needed unlike the 24/7 refrigeration
Since we are in cooler climates with that boat now, I have experimented with turning on the water cooling that same system. It does reduce the run-time somewhat [4-10% on average depending; more on sunny summer days, and also in winter when we are heating the boat full time...] but perhaps not significantly enough to justify it if I was starting from scratch and planning to stay in cooler climates. That would of course change if/when we take the boat to warmer regions.
Otherwise, given how happy we are with the efficiency of our Engel freezer
, I also wouldn't hesitate to install an retrofit Engel compressor in our ice box...
One last thought, depending upon the compressor you currently have, it might also be worth evaluating adding one of these newer [and intriguing] compressor optimizing devices
Best wishes with your project