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Forum: Plumbing Systems and Fixtures

20-11-2020, 00:58

Replies: 146

Another look at Solar Powered refrigeration on sailboats

Views: 19,541

Posted By RaymondR

Re: Another look at Solar Powered refrigeration on sailboats

Hi Richard,

I was re-reading this very interesting thread in preparation for another refrigeration adventure when the bit in red caught my attention. I'd be interested in learning a little more...

Forum: Plumbing Systems and Fixtures

06-02-2019, 21:00

Replies: 146

Another look at Solar Powered refrigeration on sailboats

Views: 19,541

Posted By RaymondR

Re: Another look at Solar Powered refrigeration on sailboats

The Efficiency Myth.

It is being stated and restated that batteries are a more efficient method of storing energy than eutectic fluids.

The energy conversions involved are:

In the case of...

Forum: Plumbing Systems and Fixtures

03-02-2019, 22:43

Replies: 146

Another look at Solar Powered refrigeration on sailboats

Views: 19,541

Posted By RaymondR

Re: Another look at Solar Powered refrigeration on sailboats

Ozepete,

Having wandered through the long trail of this and the previous thread I had forgotten just how stark the differences were between the constant cycling and eutectic systems were as...

Forum: Plumbing Systems and Fixtures

02-02-2019, 20:20

Replies: 146

Another look at Solar Powered refrigeration on sailboats

Views: 19,541

Posted By RaymondR

Re: Another look at Solar Powered refrigeration on sailboats

I couldn't help myself Richard, it was too tempting a gotcha for me to let it go by.

In Europe and north America block of ice were cut from frozen rivers and stored in ice houses for use during...

Forum: Plumbing Systems and Fixtures

01-02-2019, 22:21

Replies: 146

Another look at Solar Powered refrigeration on sailboats

Views: 19,541

Posted By RaymondR

Re: Another look at Solar Powered refrigeration on sailboats

Which is effectively adding a eutectic cold storage component to your refrigeration enclosure??

Forum: Plumbing Systems and Fixtures

30-01-2019, 22:45

Replies: 146

Another look at Solar Powered refrigeration on sailboats

Views: 19,541

Posted By RaymondR

Re: Another look at Solar Powered refrigeration on sailboats

Danfoss have had a motor control which can be run directly from solar panels by varying the compressor speed for the power available for about fifteen or more years now.

I vaguely recall reading...

Forum: Plumbing Systems and Fixtures

29-01-2019, 13:10

Replies: 146

Another look at Solar Powered refrigeration on sailboats

Views: 19,541

Posted By RaymondR

Re: Another look at Solar Powered refrigeration on sailboats

We can theorize and infer until the cows come home but in the real world what was established by Ozepete's companies tests was that the eutectic system cycled approximately once per day whereas the...

Forum: Plumbing Systems and Fixtures

28-01-2019, 12:18

Replies: 146

Another look at Solar Powered refrigeration on sailboats

Views: 19,541

Posted By RaymondR

Re: Another look at Solar Powered refrigeration on sailboats

No matter how big you make the evaporator plates, all other things being equal, the plate evaporators refrigerator is going to cycle more often than the eutectic and consequently have higher power...

Forum: Plumbing Systems and Fixtures

27-01-2019, 13:12

Replies: 146

Another look at Solar Powered refrigeration on sailboats

Views: 19,541

Posted By RaymondR

Re: Another look at Solar Powered refrigeration on sailboats

I tend to the opinion that with the complexity of interacting circumstances present in modeling a boat refrigeration system the only practical comparison regarding the overall efficiency of eutectic...

Forum: Plumbing Systems and Fixtures

23-01-2019, 20:17

Replies: 146

Another look at Solar Powered refrigeration on sailboats

Views: 19,541

Posted By RaymondR

Re: Another look at Solar Powered refrigeration on sailboats

My own conversion to eutectic systems using small DC compressors occurred after I had rebuilt my refrigerator using a kit which included a fin and tube evaporator.

The box was prismatic and fairly...

Forum: Plumbing Systems and Fixtures

20-01-2019, 02:57

Replies: 146

Another look at Solar Powered refrigeration on sailboats

Views: 19,541

Posted By RaymondR

Re: Another look at Solar Powered refrigeration on sailboats

It's far cheaper to store cold in the form of a frozen eutectic fluid with an unlimited lifetime and no ongoing maintenance costs than it is to store electricity which requires expensive batteries...

Forum: Plumbing Systems and Fixtures

18-01-2019, 21:22

Replies: 146

Another look at Solar Powered refrigeration on sailboats

Views: 19,541

Posted By RaymondR

Re: Another look at Solar Powered refrigeration on sailboats

I know from personal experience that BD 35 run constantly between the hours of 0800 and 1530 every day with about 1 1/2 cu ft of eutectic fluid will keep a 6 cu ft refrigerator at the correct...

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