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Old 03-31-2015, 07:15 AM   #21
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[QUOTE=Wxx3;320641]Since we are on this subject, does anyone have any experience with the seawater cooled Danfoss compressor?

Does it save significantly or not versus air cooled?[/

Any compressor ( Danfoss or not ) is more efficient when the head pressure is lower, water cooled condensers are more efficient than air cooled ( particularly if the air cooled is in a hot engine room) providing lower head pressure and better coefficient of performance, that is more watts of cooling per watt of electrical input.
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Old 03-31-2015, 10:22 AM   #22
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I had one that wasn't water cooled with a pump, it used something more like a keel cooler. The boat hull had a molded in spot to mount the cooler/heat sink portion. It was very quiet (no fan) and worked well. It didn't work out of the water, if you left it on by mistake out of the water, it would overheat.
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Old 03-31-2015, 03:24 PM   #23
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Hello Richard,
If you Google Penguin Refrigeration co .uk they make seawater cooled units and sell holding plates for built in units.
I hope your helping Irish industry with a steady consumption of Guinness and Irish whiskey.
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Old 03-31-2015, 06:56 PM   #24
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The kerosene powered "Silent Knight" brand fridge was popular in rural areas. As a kid I never understood how burning fuel made things cold.
Unless you have masses of battery, or run a genset 24/7, getting the fridges off the batteries is very desirable, even to the point of using propane, but as I have good eutectic cold plate units, it is currently not an issue.
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Old 03-31-2015, 09:50 PM   #25
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I have a full size dometic propane fridge and use 3 20-pound tanks a month (only about 15-18 pounds per fill). Still cheaper than 12 v w/genset. Current temp 39 and 3 degrees fridge and freezer in the bahamas. Also used for cooking.
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Old 04-03-2015, 07:19 AM   #26
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I have a full size dometic propane fridge and use 3 20-pound tanks a month (only about 15-18 pounds per fill). Still cheaper than 12 v w/genset. Current temp 39 and 3 degrees fridge and freezer in the bahamas. Also used for cooking.
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Get out Da Book and clean the chimney , and the rest of the unit, you are using 300% over normal
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Old 04-03-2015, 11:01 AM   #27
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Just a follow on from a previous post.
Penguin Refrigeration are rated very highly in the UK for marine fridge and aircon systems, log on their site to source information.
Your contact there is zeb@penguinfrigo.co.uk if you need more info or technical help.
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Old 04-03-2015, 11:17 AM   #28
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Quote:
Originally Posted by FF View Post
Get out Da Book and clean the chimney , and the rest of the unit, you are using 300% over normal
This is the correct way to quote someone. Try it...you'll love it!
(Sometimes I can't tell if you are posting or if you are quoting someone.) I use to do it the same way you are until Flywright squared me away.
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Old 04-03-2015, 02:37 PM   #29
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FF, This is a full sied, new fridge, 80-90 degrees 24/7 95% humidity, not in an air conditioned RV. Are you speaking from experience (Q). (my question mark key and some others are broke)
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Old 04-04-2015, 07:05 AM   #30
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Our Motorola unit (before the division was sold to Dometic) is at least 40 years old.

It sits outside in a white box on the after deck , in whatever sun hits it.

We regularly get 3 weeks (more in Canada) out of an old 20# BBQ bottle.

Now that the fed imbecile mandates have shrunk the contents to 15# I assume fewer days between fueling will be required.

These propane units work well , but have to be maintained.

You might look at the size and color of the flame.

You might also want to look over a modern install manual, to see the on board venting is as required.
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Old 04-04-2015, 07:19 PM   #31
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Dometic confirmed about 1.5 lb/day of propane for my location and use.
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