icebox out frig in? - Page 2 - Fiberglass RV


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Old 04-24-2015, 11:05 AM   #15
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Name: Sabrina
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all y'all, this is such great feed back
i'm feeling the trend toward beefing up the insulation
for the icebox and trying that for a while... we do only
go dry camping and for a few days at a time so far. the
frozen gal bottles only last a day and a half.
If we are not satisfied with that than maybe the solar
option will be next.

thanks again for all you good info..
i learned a lot!!!!
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Old 04-24-2015, 11:15 AM   #16
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Originally Posted by Sabrinascamper View Post
.... the
frozen gal bottles only last a day and a half.
If we are not satisfied with that than maybe the solar
option will be next.

.......
Cat litter jugs. Bigger chunk slower to melt. In a pinch wide mouth allows filling with ice cubes from a store bought bag of ice to avoid water drainage. Are a little taller than 1 gal. milk jugs. Do fit in cooler so not a huge amount taller.

The cold water absorbs heat so having it drain from ice box reduces the amount of time the ice will cool the box.
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Old 04-24-2015, 11:21 AM   #17
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A couple 1 gallon jugs should last for several days. Make sure that what ever you put into the ice box is already cold. Try to not open the ice box very many times, and don't leave it open.
An ice chest with a top lid works better because the cold air will stay inside, with a front opening box the cold air spills out.
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Old 04-24-2015, 12:13 PM   #18
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Go with a 12V fridge with a Danfoss compressor. simple swap and a better fridge which is very efficient .
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Old 04-24-2015, 12:24 PM   #19
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I have an old Norcold DE704 12/120 refrigerator with the swing motor and I improved the efficiency and noise level of the thing by using some heavy soft aluminum tape to get more surface area for the coils.
I started with this:


I got to thinking about if and decided to try making some fins to get even more surface area and added this:



This is what it looks like from the top:



I have since added more fins and lightly spray painted the shiny aluminum flat black for better heat radiation.
I am installing the fridge in a "closet" by the door with a vent from under the floor of the shelf holding it and the shelf above will have an opening for the hot air to rise with the chimney effect. The microwave/convection oven will be on top and this will help ventilate that as well.
The OLD Norcold uses about 40 watts or less and with the better radiator on the back seems to run quite a bit less than when the steel wires visible in parts of the first picture was all there was to get rid of heat. Since it uses the swing motor compressor like the Engel there is no starting surge like there is on a dorm fridge on starting.
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Old 04-24-2015, 12:55 PM   #20
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Watta a Day?

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Originally Posted by David B. View Post
Sabrina, we turn our 12 volt only refrigerator (Danfoss style compressor) on prior to leaving, and use it continuously for 5 months, while rarely ever being plugged into shore power. Our solar panel keeps our battery charged up each day, as our consumption of power is around 40 wattts/day (the refrigerator makes up 30 watts of that 40 watts). Dave & Paula

I don't think that your "Watts a Day" is accurate.
That would be nice as you could run your refrigerator all day long with a 10 watt solar panel and have power to spare.

But, most Danfoss compressors seem to have a steady 4 amp draw when on and, using only a 25% on/off cycle, that would work out to about 12 watts an hour of power consumption or about 288 watts a day.
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Old 04-24-2015, 01:27 PM   #21
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Is it possible that David B. meant amp hours a day? Most of the time that is how I have heard power consumption against battery amp hours expressed.

30 to 40 amp hours a day is within reasonable range for power consumption using a energy efficient set up. And the 288 or 12 watts an hour Bob mentions at 12 volts would be 24 amps. Assuming a little more draw than that would give you the 30 amps suggested earlier.
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Old 04-24-2015, 02:07 PM   #22
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Amp hours, Watt hours, either way works, but to say you use 40 watts a day is confusing.
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Old 04-24-2015, 02:23 PM   #23
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I agree with you David, next fridge will be a compressor type. I was just reading the Kimberly Kamper, under General Chay, first book and they make a great case for the compressor.
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Old 04-24-2015, 02:51 PM   #24
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Originally Posted by David Tilston View Post
Amp hours, Watt hours, either way works, but to say you use 40 watts a day is confusing.
Are you trying to say that Amp hours and Watts are the same?
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Old 04-24-2015, 03:34 PM   #25
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I think if you read my post, I said nothing of the sort.
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Old 04-24-2015, 11:49 PM   #26
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Made a run to Lowe's this afternoon. Procured a sheet of 1.5" rigid insulation.
Grabbed a bag of fiberglass roll insulation from a friends house, and proceeded to drill out the rivits holding in my icebox..it is now surrounded by a lovely 1.5" insulating "box". Need to stick a piece of the rigid stuff up under the framework to insulate the underside of the cabinet now and replace the rivits. We are nearly ready for our mid week camping trip...

Still want to replace it with a compressor type frig... This fix up will give us a day or so more on the ice. I look forward to having the room to put food in instead of all the ice!
How much are 100 watt solar setups running?
I do not have a clue what to look fore.




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Old 04-25-2015, 12:18 AM   #27
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Sabrina, here is a link for a semi-flexible solar panel by Renogy. http://www.amazon.com/Renogy®-Monocr...enogy+100+watt It would be very easy to mount it on the front window gravel cover by using 3M VHB outdoor tape. It would be a very short wire run to your tongue mounted battery via a controller. The panels are very durable and I never had any problems with mine (had used a rigid one on our scamp prior to knowing anything about the semi-flexible panels, and now with the Renogy semi- flexible panels on our Lil Snoozy).
Dave & Paula
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Old 04-25-2015, 12:48 AM   #28
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Quote:
Originally Posted by RogerDat View Post
Is it possible that David B. meant amp hours a day? Most of the time that is how I have heard power consumption against battery amp hours expressed.

30 to 40 amp hours a day is within reasonable range for power consumption using a energy efficient set up. And the 288 or 12 watts an hour Bob mentions at 12 volts would be 24 amps. Assuming a little more draw than that would give you the 30 amps suggested earlier.
Thank you Roger for clarifying what I was trying to say.
Dave & Paula
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