Electric AC compressor Options

[rgalla9146]

Anyone here have experience with self contained 12V AC compressor ?
Mounts remote from engine, driven by electric motor.
Seems it might be a way to have AC on a 6 conversion.
Jegs sells them in two capacities.
Pretty spendy.

[whitetwinturbo]

(IMG:style_emoticons/default/popcorn[1].gif)

[bandjoey]

Electric AV compressors in cars use up to 230v. (IMG:style_emoticons/default/sad.gif) If you see a 12v one let us know. Several Ac threads where this has been talked about.

http://www.revoltev.com/2013/08/02/the-12v...oling-solution/

[rgalla9146]

Electric AV compressors in cars use up to 230v. (IMG:style_emoticons/default/sad.gif) If you see a 12v one let us know. Several Ac threads where this has been talked about.

http://www.revoltev.com/2013/08/02/the-12v...oling-solution/

As mentioned, sold by Jegs part # 51810
9 -30 volts, 31 amps, 3753 btu
Available in two versions for small or larger cars. (specs listed are for the smaller
unit)
Was $1199 ...... now $749.99

Not doable with a 160 amp 911 alternator ?

Has anyone here seen one installed on anything ?

[Gunn1]

[quote name='rgalla9146' date='May 18 2016, 08:53 PM' post='2346865']
[quote name='bandjoey' post='2346821' date='May 18 2016, 08:40 PM']
Electric AV compressors in cars use up to 230v. (IMG:style_emoticons/default/sad.gif) If you see a 12v one let us know. Several Ac threads where this has been talked about.

http://www.revoltev.com/2013/08/02/the-12v...oling-solution/
[/quote]

As mentioned, sold by Jegs part # 51810
9 -30 volts, 31 amps, 3753 btu
Available in two versions for small or larger cars. (specs listed are for the smaller
unit)
Was $1199 ...... now $749.99

Not doable with a 160 amp 911 alternator ?

Has anyone here seen one installed on anything ?

Prob need a higher output alternator or maybe a dedicated alternator that would run just the AC, would probably still be easier than installing an old school set up

[barrym]

A few of my lotus friends have used this solution with engine swaps where it's hard to mount a compressor in limited space.
Yes, you need a correctly sized alternator, but the platform works just as advertised, but I wouldn't be looking at this for any cabin size larger than an Elise / 914

[Gunn1]

A few of my lotus friends have used this solution with engine swaps where it's hard to mount a compressor in limited space.
Yes, you need a correctly sized alternator, but the platform works just as advertised, but I wouldn't be looking at this for any cabin size larger than an Elise / 914

I got it ....fill the Frunck with ice cubes and redirect the fresh air intake into the Frunck.
Make sure to set up some sort of drain though.

[r_towle]

Boating world has made some great progress in sure small heat/AC units running off 12 Vdc.

Those are sized to service large cabins maybe ten time the size of a 914 cabin.
From what I have read, these are just how it's done now.

Taking that design and scaling it down...I don't see any reason why it would not work fine....just need to see the power requirements.
Heating and cooling with electricity is not magic, it takes power to make heat and cooling...

[boxsterfan]

I think McMark fitted a 130A GM alternator on a type IV motor with or without built-in voltage regulator. There is also a 230A GM alternator that can be used just as the 130A one.

[Gunn1]

Boating world has made some great progress in sure small heat/AC units running off 12 Vdc.

Those are sized to service large cabins maybe ten time the size of a 914 cabin.
From what I have read, these are just how it's done now.

Taking that design and scaling it down...I don't see any reason why it would not work fine....just need to see the power requirements.
Heating and cooling with electricity is not magic, it takes power to make heat and cooling...

That being said, when you increase the output of the alternator don't you increase the power consumed to spin it?

I would be curious to know which set up was more efficient.

In other words the power needed or used to produce the same BTU's

[jd74914]

Electric AV compressors in cars use up to 230v. (IMG:style_emoticons/default/sad.gif) If you see a 12v one let us know. Several Ac threads where this has been talked about.

http://www.revoltev.com/2013/08/02/the-12v...oling-solution/

As mentioned, sold by Jegs part # 51810
9 -30 volts, 31 amps, 3753 btu
Available in two versions for small or larger cars. (specs listed are for the smaller
unit)
Was $1199 ...... now $749.99

Not doable with a 160 amp 911 alternator ?

Has anyone here seen one installed on anything ?

I don't see why you couldn't use one with the 160A alternator; I would assume that your car draws nothing near that load (assuming you're not rocking a xrazy stereo, etc.).

[Dave_Darling]

In other words the power needed or used to produce the same BTU's

Converting energy from one form to another is never 100% efficient. The more conversions you have, the worse the efficiency is.

With one setup, you have mechanical energy -> thermal energy.
With the other, you have mechanical energy -> electrical energy -> mechanical energy -> thermal energy.

The first one needs to be hellaciously inefficient, and the latter three all very efficient, for the second setup to be more efficient than the first.

Given the same type of mechanical compressor at the end, the electric-driven one will never be as efficient as the straight mechanical one.

--DD

[jeffdon]

A few of my lotus friends have used this solution with engine swaps where it's hard to mount a compressor in limited space.
Yes, you need a correctly sized alternator, but the platform works just as advertised, but I wouldn't be looking at this for any cabin size larger than an Elise / 914

I got it ....fill the Frunck with ice cubes and redirect the fresh air intake into the Frunck.
Make sure to set up some sort of drain though.

I believe Eliot did an ice based AC system using an ice chest, coil in the ice, water in the coil, all pumped through a heater core with a fan. I seem to recall him saying it worked pretty well even in the hot summers he gets. Just need to replenish the ice once in a while. Bet with some of the new super ice boxes, like Yeti, and with a brine/ice solution, it would be even better.

[porschetub]

230amp altenator holy...drive that ,turn the cooling fan and turn the back wheels,might need a BIG Raby motor for that system (IMG:style_emoticons/default/av-943.gif) (IMG:style_emoticons/default/av-943.gif) .
Not to mention a suitable battery and associated wiring to power the beast.
I lived in Australia pretty hot there , I wound down the window (IMG:style_emoticons/default/dry.gif)

[Steve]

I am starting to see this one pop up in various threads.
Benling DM18A7
From Chine it lists for $300.00 on eBay they want $899 for it.
It looks pretty promising, but no luck finding one.
http://m.made-in-china.com/product/Dm18A7-...-761066265.html
https://m.alibaba.com/product/60112520554/1...sor-DM18A7.html

[jim_hoyland]

Steve: what's your alternator put out ? How many amps will the electric compressor require ?

[Steve]

Steve: what's your alternator put out ? How many amps will the electric compressor require ?

I have a stock 98 amp Alternator. The electric compressor can run at 40, 60 or 90 amp. Even the 40 amp setting should be able to cool our tiny compartment

[Elliot Cannon]

A few of my lotus friends have used this solution with engine swaps where it's hard to mount a compressor in limited space.
Yes, you need a correctly sized alternator, but the platform works just as advertised, but I wouldn't be looking at this for any cabin size larger than an Elise / 914

I got it ....fill the Frunck with ice cubes and redirect the fresh air intake into the Frunck.
Make sure to set up some sort of drain though.

I believe Eliot did an ice based AC system using an ice chest, coil in the ice, water in the coil, all pumped through a heater core with a fan. I seem to recall him saying it worked pretty well even in the hot summers he gets. Just need to replenish the ice once in a while. Bet with some of the new super ice boxes, like Yeti, and with a brine/ice solution, it would be even better.

I worked at it for awhile. Kinda gave up on it. These work well. I would guess it would last about 2 hours or so before you have to stop for more ice. In an airplane you might only need it for a short while anyway. It can get pretty cool at altitude. http://portable-aircraft-air-conditioners-...nstruction.com/

[Series9]

The answer is: NO.

I don't feel like explaining it right now, but forget about it.

[Rand]

It would work about as well as a 12v electric heater. (IMG:style_emoticons/default/wink.gif)