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Old 18-07-2014, 14:28   #1
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Join Date: Aug 2010
Location: Boat home port Indiantown Fl Crew central Ohio
Boat: Island Trader 41 c/c ketch
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Bypass Refrigeration Thermostat

I want to bypass the thermostat on my Adler Barbour cold machine
while charging batteries to lower temperature in ice box , saving ah
while running off the batteries. Will this cause any problems?
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Old 18-07-2014, 18:55   #2
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Re: Bypass Refrigeration Thermostat

Quote:
Originally Posted by S/V Tai Ann View Post
I want to bypass the thermostat on my Adler Barbour cold machine
while charging batteries to lower temperature in ice box , saving ah
while running off the batteries. Will this cause any problems?

The simplest way to run compressor when surplus power is available is to set thermostat to full cold. An expensive way is to use a battery combiner to bypass thermostat when ever charging current of 13.8 volts is available. Either way you may freeze items you do not want to freeze.

Remember there is only one Btu saved per degree per pound stored unless liquid product is phase changed into ice. Frozen liquid contains 144 Btu per pound. A water glass with ice in it stores energy for 100 times longer than a 33 degree F glass of plain water.

In other words it is not worth bypassing thermostat unless a sufficient amount of liquid is phase changed into ice. Once frozen into ice only 1/2 of a Btu per pound, per degree, can be stored below frozen liquid 32 degree temperatures.

You are better off adding a battery than bypassing thermostat with the capacity of a Danfoss BD compressor system.
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