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Auto Air Conditioners battery powered by your A.E.


By John II, Section Remote Living
Posted on Sun Jul 17, 2005 at 09:13:29 PM MST
Has anyone converted one for house use driven with a DC motor ?

With all that home brew wind power and or solar power available, has anyone used an air conditioner out of a auto for use in their house driven by a DC motor ?

Would be curious to know if anyone has yet tried this. This would circumvent the necessity for an absolutely huge inverter.

Has anyone out there tried this ?

Any Ideas on whether this might work or not would be interesting.

John II
Auto Air Conditioners battery powered by your A.E. | 7 comments (7 topical)

Re: (3.00 / 0) (#1)
by ghurd on Sun Jul 17, 2005 at 04:35:47 PM MST

From what I read, compressors are very inefficient.
That said, a dump load is a dump load.
And a heat pump is pretty good in efficiency.
And a heat pump is just an air conditioner in reverse.
Anyway.

A 'York' compressor is good for varing RPMs and others are not.
A York compressor has the oil outside the 'loop' so it evades many problems.
Low RPMs with a splash oil system can burn it up.

Therefore, I can't see why a 1/4 or 1/2 HP DC motor will not run the air conditioner (or an air compressor).
http://www.fieldlines.com/story/2005/4/18/55524/5414

Ther may be issues with R- this and R-that.
I don't know.

There is a couple places on google about using a York as an air compressor, but I can't find the links right now.
G-
Ghurd.info



Re: Auto Air Conditioners battery powered (3.00 / 0) (#2)
by drdongle on Sun Jul 17, 2005 at 04:48:27 PM MST

I don't see why it couldn't be done, in fact the commonly available "tread mill" motors might be a good choice. These are usually rated for 1-2 H.P. at 100 -180 VDC depending on the make. Of course it will depend on what sort of battery system you have, they will work on lower voltages but not as well and probably not at all on 12 V.
Carpe Vigor, Dr.D


Re: Auto Air Conditioners (3.00 / 0) (#3)
by BrianK on Sun Jul 17, 2005 at 05:56:24 PM MST

What about hooking an old belt driven fridge compresser to a dc motor those pumps seem to turn easy

 .



Re: Auto Air Conditioners battery powered by your (3.00 / 0) (#4)
by pyrocasto on Sun Jul 17, 2005 at 09:27:53 PM MST

If only peltiers ran a little more efficient those would be good since they work at a great varying voltage.



Re: Auto Ai (3.00 / 0) (#5)
by John II on Mon Jul 18, 2005 at 07:57:17 AM MST

I was thinking about supplementing our 110v air conditioning and running it, only when Solar power can't hack it.

I'm sure there's a performance curve, but I don't see why you can't just belt a car air conditioner so you run it slower to match the HP of your electric motor.

If I understand correctly most car air conditioners draw about 5 hp. But petro hp is always more than electric hp.

There are old cars setting around everywhere with fully plumed air conditioners systems. So cost isn't a factor just time. Here lately time has been a short commodity. But I hope to give it a shot.

I don't see why a reasonably large wind generator couldn't directly power a air conditioner compressor as well. Just build a 2n'd wind alternator head, and mount it as a drive motor on your compressor. You could have a multi-phase wind generator directly driving your compressor that way. I don't see why it can't be done. They use that method with wind machines to drive 3 phase commercial submersible pumps all the time.

Keep up the great ideas : )

John II



Re: Auto Ai (3.00 / 0) (#7)
by elvin1949 on Mon Jul 18, 2005 at 08:38:19 PM MST

John II
 I see no reason why it won't work.
late model R12 system's are common,and can be converted to almost any working refridgerant fluid.
Run it with dc motor off of a battery bank.
[constant rpm] Change the venture to get the proper cooling temp. ie 38 to 45 deg. at the vent.
 You will need 3 motor's 2 to 2.5 hp for compressor
and two smaller motor's for condensor and evaporator coil's.[fan's]
later
elvin

[ Parent ]


Re: Auto Air Conditioners battery powered by your (3.00 / 0) (#6)
by DanG on Mon Jul 18, 2005 at 08:37:39 AM MST

If unable to supply traditional A/C system maybe wind w/ belt driven car compressor might be a way to get chilled water; should be straightforward closed refrigerant loop. Thermal siphoning might have enough circulation to chill a tank of water for your tiki-hut swamp cooler or somesuch application...


Auto Air Conditioners battery powered by your A.E. | 7 comments (7 topical)
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