Last year I built a freezer
and would recommend buying
a ready made box if you can get one the right size. Mine was complicated because I wanted to do as little "surgery" on the boat
as possible so did a lot of in situ assembly. It was a LOT of work.
I am happy with the outcome but if you asked me halfway through the job you would have had to censor the reply.
I built the box under the saloon
seat with 100mm Urethane foam as I would have lost
too much space with 150. The research
I did suggested that 100 would be OK in my situation but 150 is ideal.
unit is an Australian brand Eutectic unit (Ozefridge.com.au). So far I am very happy with the unit but I guess time will tell.
The eutectic installation
is supposed to use less power but I have not actually measured power consumption
. It has quite a large reservior of eutectic fluid and works hard cooling
that down to target temp of around -21C. Interestingly they use an anti freeze mix!
The unit has a Danfoss 50 compressor
but has a number of extra features added. It comes with a water
cooled capability as standard, switching between air and water
is a simple switch. They recommend plumbing
into the fresh water supply and recirculating this rather than a seawater system. I am on air cooling
but may look at water. They recommend water for bigger installations.
Comments on the eutectic operation vs an evapourator plate:
1: You definitely get cold/hot spots in the freezer
but installing a circulating fan would fix this.
2: It takes a long time to freeze things so always try to put food
in already frozen. What we did for ice for example was to make the ice in the Isotherm
ice compartment and then put it into the freezer for longer term storage
I can post some pics if anyone is interested.