"Texas"fan option for refrigerator - Page 9 - Escape Trailer Owners Community

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Old 12-02-2013, 09:27 AM   #81
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Originally Posted by Ruthe View Post
Okay so bottom line here -- can we in general, figuring that we're not in extremely hot places -- count on the freezer to keep meat and fish frozen?
Ruthe, we have had no problems with out fridge to date. We have the larger 6.7 cu-ft fridge in our 19'. During a 3 week vacation last summer with outside temperatures varying from about 15° C to 34° C (59° to 93° F) with the fridge powered the entire time by propane (including driving), items in the freezer including ice-cream remained frozen. In our case, the warmer temperatures prevailed for only about 1 week.
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Old 12-02-2013, 10:27 AM   #82
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Here's another question. With the additional fan is there additional noise? THe thing we loved about our Dometic in the Airstream was that it was absolutely silent.
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Old 12-02-2013, 12:05 PM   #83
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Since there are some of us who seem to know how these things work, I have often wondered, if operating off 120v, does the refer need an exhaust and fresh air intake. The reason I ask is, as some have already mentioned, in cold weather the refer is not as efficient as in more temperate climates. Would it not be good to cover the fresh air intake to (1) make the trailer warmer in colder climate and (2) help the refer? I realize this only applies to 120v operation.
I am ignoring Josephson junction and other solid state coolers.

Both compressor and absorption refrigerators work better in cooler weather. Both use a fluid which circulates inside the fridge and takes heat from the inside to the exterior. The fluid is either heated (absorption) or compressed, and passes through a "radiator" to give up heat to the outside air.

The differences are in efficiency and the details of the cycle - fluids used, piping, leveling requirements, etc. Compressor coolers are better except: 1) they are usually noisier and 2) they run on electricity, not LP. Off the grid solar houses often (usually?) use high efficiency, well insulated compressor fridges rather than absorption units because they are so much more efficient.

Blocking the exterior vents will cause the fridge interior temperature to rise, since the fluid will have only warm (stagnant) air to try to give heat to. (Wrapping the electric heating element and the fluid pipe though it with insulation would make it work better since more of the heat would get used in the fridge cycle - but could (WOULD) cause problems running on LP.)
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Old 12-02-2013, 12:17 PM   #84
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Forgive me if I'm repeating something already posted, but I just spoke to Reace who said that there is a product called the Camco Solar powered frig vent that could be installed on the top of the trailer above the frig, after the build is complete, and this is reputed to do the same thing as the Texas Fan. It's a bit cheaper than the Texas fan would be at the initial installation and definitely cheaper than installing the Texas fan after the fact.
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Old 12-02-2013, 12:49 PM   #85
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Ruthe,
See post #6 here it refers to this Solar-powered RV Fridge Vent System - Camco 42165 - Refrigerator Accessories - Camping World
this will work only if you have the roof vent, so in making your refer decision, make sure you get the refer with the roof vent, it may only be the big one (6.7?)
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Old 12-02-2013, 12:52 PM   #86
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I am ignoring Josephson junction and other solid state coolers.

Both compressor and absorption refrigerators work better in cooler weather. Both use a fluid which circulates inside the fridge and takes heat from the inside to the exterior. The fluid is either heated (absorption) or compressed, and passes through a "radiator" to give up heat to the outside air.

The differences are in efficiency and the details of the cycle - fluids used, piping, leveling requirements, etc. Compressor coolers are better except: 1) they are usually noisier and 2) they run on electricity, not LP. Off the grid solar houses often (usually?) use high efficiency, well insulated compressor fridges rather than absorption units because they are so much more efficient.

Blocking the exterior vents will cause the fridge interior temperature to rise, since the fluid will have only warm (stagnant) air to try to give heat to. (Wrapping the electric heating element and the fluid pipe though it with insulation would make it work better since more of the heat would get used in the fridge cycle - but could (WOULD) cause problems running on LP.)
I'm only concerned with absorption refers operating off 120v, do they operate the same as compressor units or is the absorption still operating using the 120v as a source of heat?
At home your refer is a heat pump, it cools by pumping the heat out of the box. Thus you will fell heat around the exchange unit and the cooler you keep the area, the more efficient it becomes. Is this theory the same with absorption refers?
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Old 12-02-2013, 01:21 PM   #87
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Quote:
Originally Posted by cpaharley2008 View Post
Ruthe,
See post #6 here it refers to this Solar-powered RV Fridge Vent System - Camco 42165 - Refrigerator Accessories - Camping World
this will work only if you have the roof vent, so in making your refer decision, make sure you get the refer with the roof vent, it may only be the big one (6.7?)

Roof vent comes on all 19 & 21 now. I'm sure 5T will also have it.
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Old 12-02-2013, 01:28 PM   #88
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Originally Posted by cpaharley2008 View Post
I'm only concerned with absorption refers operating off 120v, do they operate the same as compressor units or is the absorption still operating using the 120v as a source of heat?
At home your refer is a heat pump, it cools by pumping the heat out of the box. Thus you will fell heat around the exchange unit and the cooler you keep the area, the more efficient it becomes. Is this theory the same with absorption refers?
Absorption units on 120V use a resistance heater (think toaster) for heat instead of an LP flame, they do not use a compressor. ALL refrigerators are heat pumps - the cooler the outside heat exchanger the more efficient the fridge.
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Old 12-02-2013, 01:30 PM   #89
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Roof vent comes on all 19 & 21 now. I'm sure 5T will also have it.
Last week, Kim told me the fridge in the 19`trailer has 2 side vents: One for intake, one for exhaust. j
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Old 12-02-2013, 01:48 PM   #90
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Roof vent comes on all 19 & 21 now. I'm sure 5T will also have it.
I think it depends on which refer, currently but supposedly I read someplace where Escape in 2014 will only be installing the standard 6.7 with roof vent in the 19 and 21 without any substitutions, for simplifying things. I maybe wrong.
That may eliminate a lot of the disparities the members have between units of the same type.
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