Affordable 12v electric a/c compressor options?
- Thread starter beeman
- Start date
Joel K
Supporter
Dave,
A couple of the Ultima guys use this one, but is not inexpensive…
www.electricaircon.com
A couple of the Ultima guys use this one, but is not inexpensive…
MD18 DC Electric 12 Aircon Compressor
Rencool have released their new series DC Voltage Compressor to suit the Automotive market. Rencool manufactures DC Voltage Compressors up to 8Kw @ 24 Volt for Mining, Military and Heavy Construction Industries.
www.electricaircon.com
Neil
Supporter
Something isn't right. The 18cc version shows "1-3kW" but if one does the calculations: 12V x 30A = 360W and 12V x 55A = 660W ?????????Dave,
A couple of the Ultima guys use this one, but is not inexpensive…
MD18 DC Electric 12 Aircon Compressor
Rencool have released their new series DC Voltage Compressor to suit the Automotive market. Rencool manufactures DC Voltage Compressors up to 8Kw @ 24 Volt for Mining, Military and Heavy Construction Industries.
Howard Jones
Supporter
Paul Hendrickx
Supporter
I was looking also this way out to cool down my (future) car, through electric compressor...... seems none of them actually working really on 12 volts, but the motor is or 110vac or 220/240vac.... and converted from12 volt battery... some times the converter is stand alone, or found a few with build in , on top of the compressor motor,..... and that's why you need at least 55 amps over 12 volts to feed the thing..., so big alternator & battery needed........
Paul
Paul
Neil
Supporter
Thanks Howard. I slept through "Heat & Thermodynamics" class.
Howard Jones
Supporter
I had a partial plan in motion to use a separate belt system driven from an axle to drive an AC compressor. I was thinking I could take advantage of the motion of the car under braking as well as cruising speeds where the loss of a few hp to drive the alternator would not be noticed. Some consideration of pulley ratios would be in order but I think the compressor would begin working well enough at relatively low vehicle speeds. I was going to use a reverse switch to deactivate the clutch in reverse.
STOP and go traffic would be a problem but highway speeds or even low continuous speeds would still turn the compressor at an adequate rpm to function. Compressor speeds would need to be something like 1000-3000 RPMs I would think. A 27-inch tire turns about 350 RPMs @30 mph and a little over 1000 RPMs at 90 or so. This seems to indicate a pully drive ratio of about 3 to 1, again readily available pulley diameters around 2 1/2 to 7 inches would work.
I never followed through on this but all of the parts are readily available and this is completely doable.
STOP and go traffic would be a problem but highway speeds or even low continuous speeds would still turn the compressor at an adequate rpm to function. Compressor speeds would need to be something like 1000-3000 RPMs I would think. A 27-inch tire turns about 350 RPMs @30 mph and a little over 1000 RPMs at 90 or so. This seems to indicate a pully drive ratio of about 3 to 1, again readily available pulley diameters around 2 1/2 to 7 inches would work.
I never followed through on this but all of the parts are readily available and this is completely doable.
Howard Jones
Supporter
"loss of a few hp to drive the alternator" I should have said compressor.
Stop-and-go traffic is probably when you'd need AC the most.
Howard Jones
Supporter
Stop-and-go traffic is no place for an SLC. A Prius is for commuting to work and back.
The thing that ended my plan above was rolling backward. I couldn't think of an easy way to address that one. I don't think an AC compressor would like to be turned backward.
The thing that ended my plan above was rolling backward. I couldn't think of an easy way to address that one. I don't think an AC compressor would like to be turned backward.
