Date: Tue, 24 Aug 2004 18:08:55 -0700
Reply-To: Rocket J Squirrel <j.michael.elliott@ADELPHIA.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Rocket J Squirrel <j.michael.elliott@ADELPHIA.NET>
Subject: Re: DC Refrigerator Alternatives
In-Reply-To: <000701c48a3e$c85b7960$ef02fea9@none8d9z0zb52k>
Content-Type: text/plain; charset=us-ascii; format=flowed
Stan Wilder wrote:
>That all sounds real good.
>What I see as the weak link is that the door opens and the cold dropps out.
>If the Westy fridge was just flipped over on its little backside it would
>become a good bucket to hold the cold.
>The refrigeration unit would work just as hard but the fridge would stay
>colder.
>
I wonder how much "cold" is "stored" in the air inside the reefer, and
how much is "stored" in the food, etc. It might not raise the temp of
the food to cool the new air that has come into the reefer during a door
open/close cycle.
Mike "Rocket J Squirrel" Elliott
71 VW Type 2 / 84 Westy: A poor but proud race.
KG6RCR
>----- Original Message -----
>From: "Michael Elliott" <j.michael.elliott@ADELPHIA.NET>
>To: <vanagon@GERRY.VANAGON.COM>
>Sent: Tuesday, August 24, 2004 7:33 PM
>Subject: Re: DC Refrigerator Alternatives
>
>
>
>
>>Vince S wrote:
>>
>>
>>
>>>A new subject to better reflect the content.
>>>
>>>Here is a self-contain complete system built with Danfoss BD35F if you
>>>provide your own fridge box such as modifying the existing Dometic
>>>cavity and put this unit in the small cupboard adjacent to it.
>>>
>>>http://www.sailnet.com/store/item.cfm?pid=30527
>>>
>>>
>>>
>>>
>>Hmmm. I'm trying to wrap my head around this one. My Westy is on some
>>truck miles from here right now, so I can't take a measuring tape to it
>>-- how thick is the insulation on the stock reefer?
>>
>>Power consumption for this unit is expressed as average run time X power
>>input. Power input is said to be 45 to 60 watts (why the range?).
>>Average run time for 2'' polyurethane insulation is 40% . This affords
>>an internal temp of 41F with outside temp of 80F. Worst case with these
>>numbers would be 60W X 40% =24W =2 ampere/hr @ 12 volts.
>>
>>Did I do that right?
>>
>>Given the largest battery that can fit under the driver's seat -- how
>>quickly would it become discharged at 2Ahr?
>>
>>And this Danfoss BD35F-based Waeco Coolmatic Cooling Kit . . . the
>>"larger picture" is the same low-rez picture on the linked page (above),
>>just scaled larger so there isn't really more information. It is larger,
>>though, so they ain't lying. What I can't quite figure out is where the
>>hot air is meant to be dumped. If you mount the compressor in the small
>>cupboard adjacent to the fridge box, I reckon the heat would have to be
>>vented outside somehow?
>>--
>>
>>Mike "Rocket J Squirrel" Elliott
>>71 VW Type 2 / 84 Westy: A poor but proud race.
>>KG6RCR
>>
>>
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