Refrigerator shade - Fiberglass RV


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Old 10-22-2018, 09:47 AM   #1
Raz
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Refrigerator shade

When camping in a site with little or no shade my propane fridge struggles to maintain a safe temperature. Camped in the outer banks last spring I made a shade from tin foil and cardboard with good results. This fall I returned with an improved version. To an aluminum shade I added a muffin fan (12v., 70mA, 24 cfm) powered by solar (two 6v., 1 watt). I'm happy with the results and thought others might be interested.
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Old 10-22-2018, 10:26 AM   #2
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Very neat idea, have you done any of the other popular refrigerator mods in addition to this or just the shade?
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Old 10-22-2018, 01:14 PM   #3
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Originally Posted by Gompka View Post
Very neat idea, have you done any of the other popular refrigerator mods in addition to this or just the shade?
No just the shade and fan.
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Old 10-22-2018, 02:18 PM   #4
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What a great idea- which way does the air move ?
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Old 10-22-2018, 05:00 PM   #5
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What a great idea- which way does the air move ?
Simple answer: out.


Technical answer: Heat inside the fridge is transferred to the refrigerant. The refrigerant transfers it to the condenser fins on the back of the fridge. The fan blows out sucking that heat from the condenser making the fridge work better. The fan is positioned so as not to suck the heat from the propane chimney as that heat is needed to move the refrigerant.
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Old 10-22-2018, 05:23 PM   #6
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Exactly what I wanted to know Raz, thanks.
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Old 10-22-2018, 05:53 PM   #7
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I'd be curious as to how well a shade works without the fan. I have thought about making a small "awning" that would shade the fridge vents but so far have not done anything with a fan, or made plans to do so.
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Old 10-23-2018, 02:00 AM   #8
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Nice looking product and I am sure it helps.

It is also good for everyone to remember in windy conditions to park the trailer so the wind is situated in a direction to the vent that helps exhaust the hot air out of the vent instead of blowing air into it.

If the wind is working against you by blowing onto the side of the trailer that has the fridge vent then the wind will force the hot air and the exhaust fumes back inside. So do pay attention to the wind. Having shade is good but it could be shaded on that side and also have the wind not allowing cooling. A little bit of shade won't overcome a lot of direct wind force blowing against that side of the trailer. Too much negative pressure might not be good either. There is always going to be more than one factor at play at any one time in nature. Sometimes one is the dominate player over the other, the next time it might be the reverse. On really hot days you will have to pay attention to using every advantage you can get.
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Old 10-23-2018, 02:30 AM   #9
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Quote:
Originally Posted by Raz View Post
Simple answer: out.


Technical answer: Heat inside the fridge is transferred to the refrigerant. The refrigerant transfers it to the condenser fins on the back of the fridge. The fan blows out sucking that heat from the condenser making the fridge work better. The fan is positioned so as not to suck the heat from the propane chimney as that heat is needed to move the refrigerant.

The vent shown ( post #1 ) appears to be the lower vent. I don't think you want air being drawn out of the lower vent. It needs to go in and then out the upper vent.
I don't think the direction of the wind has anything to do with this. On my trailer, the bottom vent ( air in ) and the top vent ( hot air out ) are both on the same side. Some trailers have a bottom vent and a roof vent. In any event, the answer, my friend, is not blowin' in the wind
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Old 10-23-2018, 04:37 AM   #10
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l'd be curious as to how well a shade works without the fan. I have thought about making a small "awning" that would shade the fridge vents but so far have not done anything with a fan, or made plans to do so.
My first version was made from cardboard, tin foil, and duct tape. No fan. Try it. You can't beat the price. Understand, both trips were in 80 degree weather. In the summer we'd melt.
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Old 10-23-2018, 04:53 AM   #11
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KC, we were in the Cape Hatteras seashore which is a sting of barrier islands miles off the North Carolina coast. The wind direction is always changing. It didn't seem to matter. Perhaps the louvers on the vents help?

Glen, look at the first picture again.
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Old 10-23-2018, 11:04 AM   #12
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There is a major problem with one of the fans & spacing in the image in Glenn's post. It is critical that the air movement be through, not past the cooling fins on absorption refrigerators. If you check Dometic's installation guide, they do not allow the spacing that the "pink" central fan requires. The other two fans will probably help, but proper fins to wall spacing is critical.

In most cases, a maximum of 1" between the back wall & the fins is allowed unless a baffle is added to direct the air flow over the fins. The center fan will move air around the fins rather than through them, lowering the performance of the refrigerator.

Making changes to direct the internal air flow over the cooling fins will most likely do more to increase performance than adding external fans, although shading the entire refrigerator outside wall does help if you must park the trailer with the refrigerator wall facing the sun in high temperatures.
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Old 10-23-2018, 11:09 AM   #13
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It seems to me Raz's fan works on the same principle as the interior fridge fan shown in Glenn's post. It's a single "flue", for want of a better word; I think the air current created would draw fresh air in to the lower vent when pulling the warm air out of the upper. Win win!
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Old 10-31-2018, 11:28 AM   #14
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My Mistake

On a summer day in Montana, the direct sunlight killed my fridge. I made that mistake, ONCE!
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