12 volt ac??

One thing I noticed about those and the zero breeze is that they work much better if in the camper not outside. Im not understanding their design. Ac works by removing humidity and car and home units use the area to be cooled for their intake air. That way they can get better and better as the room gets conditioned. By putting the unit outside it constantly has to cool the hot humid outside air.
Im wondering why they dont have an intake hose. That way you could put it outdoors for exhausting the hot air and noise while having 2 hoses inside 1 for intake and 1 for conditioned air.
Watching the video reviews they all do better in the car than outside for that very reason.
 
Jack Denver said:
Has anyone thought about peltier thermoelectric cooling devices?

There is a 12v 120 watts of cooling (400 BTU) on Amazon for $75. Add a couple and a small 12v computer fans to circulate the air.

Click to expand...

I looked into this back in 2012 when I was busy trying to design my own benroy deriviatve and saw my first CampInn. I thought the same thing....wouldn't it be great if....

I'm too lazy and tired to do math in my head...400 watts is not very much cooling. Rememer the little desktop refrigerators that would chilll a 6 pack over night? Those were about 400 watts....that is ironcially enough, about how many BTU's the average size adult creates...so you'd need two just to offset the human factor.

Peltier is REALLY inefficient. Becuase I hate math I asked AI....
  • A 5,000 BTU/h cooling load equals 1,465 watts of heat removal.
  • Peltier modules operate at 10–15% efficiency of refrigeration, compared to 40–60% for compressor-based systems.
  • Therefore, a Peltier system would need ~7,300 to 14,600 watts of electrical input to achieve the same cooling as a 5000 BTU AC.
  • At 12 volts, this equates to:

    7300 Watts / 12 Volts = 608 amps to 14600 Watts / 12 Volts = 1217 amp.
In contrast, a typical 5,000 BTU window unit draws only ~4.35 amps at 115V (~500W).

To put that in perspective, the 100Ah battery would be depleated in about 10 minutes :(
 
I calculated the cooling load at 1250 BTU with one person. If you are only using it at night when the sun is down, you may be able to get in the comfort zone with 400 BTU. Add in they are quiet so your not up all night listening to a compressor rattle and....
 
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