Wild hair idea trunk A/C system - Alfa Romeo Bulletin Board & Forums
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post #1 of 20 (permalink) Old 06-25-2012, 11:38 AM Thread Starter
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Wild hair idea trunk A/C system

While I've yet to upgrade my 'front' A/C, I've been thinking that if a small A/C self contained unit installed in the trunk could be made to work, that would go a long way towards having a really (actually) cool Alfetta GT.

My thought is electrically powered.

In gigem75's tunk mounted A/C unit thread there is a URL for a possible A/C unit for home made electrical cars. The suggestion is to use the innards of a (home) wall mounted A/C, then use one of 'their' A/C power inverters.

For an electric car, there is tons of 'juice' available - though most likely the A/C would lower the mileage.

I even checked out a self contained A/C system for a smallish helicopter. Very little detail, but it was using a very large electric motor to run (I gather) an automotive type compressor, etc.

The latest thought is to find a really large car fridge. See below. Okay, I'm not going to pay over $1.6K just to see if it would work...but. It is an 84 quart fridge/freezer (the latter from 40 to 0F). I'm guessing the rear of the fridge is the A/C, making it roughly 21"h x 31" w x 3-4" w. I'll add that it is either 110V AC or 12V DC @ 4.2 amps.

The 21" h would be a problem in the trunk of an Alfetta GT, but perhaps something along these lines could be found with a lower profile. If so, a basic metal shell with cooling openings, an electric motor with a squirrel cage, and vent to the interior 'might' at least blow cool (if not 'somewhat' cold) air to the rear. If in slow, heavy traffic, you could turn off the 'front' A/C and still have at least some cooling. And yes, some sort of fresh air duct would be needed.

I'm not remotely expecting this thought process will go any farther, but it still intrigues me...to some extent.
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post #2 of 20 (permalink) Old 06-25-2012, 12:58 PM
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Bell 206 runs an auto type AC compressor off the tailrotor shaft. The Alfetta has something similar to a tailrotor shaft. But I can pull enough power out of the engine running silly stuff that the helicopter can't fly. You might encounter a similar ground based problem with the Alfetta if a lot of high power demand devices are added.

But I do understand where you're going given the 103F high today in Waco.

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post #3 of 20 (permalink) Old 07-09-2012, 10:29 PM
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I have no idea about the price or what sort of ampage it would need, but a Denso electric air conditioning compressor might do the trick... see below link.

DENSO Automotive OEM Products

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post #4 of 20 (permalink) Old 07-11-2012, 06:32 AM
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Well! Off to the wrecking yard to look for a totaled Pious.

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post #5 of 20 (permalink) Old 07-11-2012, 04:59 PM
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Firstly, what is the plural of Prius... perhaps Priae?

Anyway, do Priae actually travel fast enough to ever get totalled?

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post #6 of 20 (permalink) Old 07-11-2012, 05:07 PM
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I didn't think of that. We have someone at work that has one. Maybe I should borrow it and test that theory.

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post #7 of 20 (permalink) Old 07-11-2012, 05:57 PM Thread Starter
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Unfortunately you'll have to take along the Prius's electrical system, as well as the electric compressor. I believe that the Prius uses a pretty high voltage. Also, while there is a lot of 'juice' in a Prius, it would take a very large alternator to power one of these compressors.

At least one of the Ford models also uses the Denso compressor.

There's definitely no free lunch here, but I still can't help but think that a 'reasonably' compact auxiliary A/C system/unit should/might be available.

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post #8 of 20 (permalink) Old 07-12-2012, 12:02 AM
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Quote:
Originally Posted by Biba69 View Post

There's definitely no free lunch here, but I still can't help but think that a 'reasonably' compact auxiliary A/C system/unit should/might be available.
An old Land Rover Discovery has two air conditioners - one in the back for all those roof windows and heat build up. I've never seen it apart to see how it works.

1967 1600 Spider
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post #9 of 20 (permalink) Old 02-11-2013, 11:42 PM
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Hi Biba

When I read the title I was thinking of something completely different - however, it may still interest you.

As far as I can remember some Rolls-Royce/Bentleys used to have an A/C condenser under the trunk. I suppose it was an auxiliary unit, not the main one. That would help lower the temperature of the gas, right? Sort of having an auxiliary radiator in your cooling system. I do not know whether those had cooling fans, but I suppose not (at least, not in the early years, there were no slimline electric fans back then).

Along the same lines... maybe you should check out Kuehl Air ideas. Kuehl Air specialise in improving the A/C system of air-cooled Porsche 911s. What I know about them has been gleaned from their ads but the idea is mostly the same - installing a supplementary condenser somewhere else.

I ignore whether the use of another condenser mounted in-line with the front one would make it necessary to use a more powerful/bigger compressor.

Old-style Minis do not have much space under the bonnet. I seem to remember that years ago one possibility was fitting the condenser under the trunk.

Where did you put your compressor in the end? where the old York used to live ľup high on the driver's side or down below to the right, where the Twin Spark engine normally has it? Not much space in there in an Alfetta though, that's why I am asking.

Have you changed/improved the evaporator side of things?
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post #10 of 20 (permalink) Old 07-29-2013, 06:31 AM
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Along the "wild hair" idea theme, why not a cryogenic nitrogen cylinder?

LN2 is pretty cheap. Just run the LN2 through the evaporator and then overboard.

Mike
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post #11 of 20 (permalink) Old 07-29-2013, 10:31 AM
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Remote A/C

Actually, rear A/C in an Alfa has already been done. Our friend in Florida, Delmas Greene added a rear shelf evaporator to his 1600 Vignale years ago. he told me the system works good and I think its almost a daily driver. I'm sure Delmas is here on the BB somewhere and I'm sure he would be more than glad to share intelligence on his system as well. Why reinvent the wheel (unless you have a better wheel) ? All Alfetta and GTV6 owners need more A/C. Good luck Biba and I'll keep watching this thread.

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post #12 of 20 (permalink) Old 07-29-2013, 12:15 PM
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Evaporative units do not work well in humid climates.

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post #13 of 20 (permalink) Old 07-29-2013, 01:00 PM
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post #14 of 20 (permalink) Old 07-30-2013, 11:17 AM Thread Starter
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Vintage Air's rear trunk A/C system simply moves everything back 'there' in your jalopy. Hardly a compact auxiliary solution.

I believe it was for a '65 to '74 GTV that an ABBer installed one of VA's rear trunk systems and it worked well for him. In his case, as I recall, he didn't want to junk up the dash area.
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post #15 of 20 (permalink) Old 07-30-2013, 01:58 PM
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Just another wild prob out there is the rear unit off a Dodge Caravan.

George
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