OT Cold water 12 volt air conditioner for the 914., Anyone tried this? Options

[angerosa]

That is way cool! I actually had I colleague at work try something similar with his computer CPU.

The salt in the water will lower the boiling temperature and the freezing temperature of water which is why they put salt on the roads in the winter and you put salt in the water when you're making pasta. The pasta doesn't taste any different, they just believe it will come out better if the water that's cooking it isn't 100 degrees C. Water will come to a boil faster too.

It also changes the specific heat of the water which means it will absorb heat more redily and quickly but you will melt your ice faster so you should get a lot of cooling but your system will "burn out" quickly.

The best thing for a long trip is to have the cooler in a freezer so it's already cold and fill it to the top with pure ice cubes. If it's already cold you won't waste cooling power bringing the inside of your cooler down to temperature. The ice will melt and the water will be at 0 C instead of putting an ice/water mixture in and having the water rob you of cooling power as the ice brings it down to 0.

Some problems you may have is that when the ice melts your cooling coils may not be fully submerged. You'll have to test it out. If you're going on a short drive I would put the water and ice mixture in there just like you planned.

Your heat exchanger is going to create a lot of water from condensation so you may have a puddle in the trunk or where ever your going to put it.

[jasons]

My guess is, there is some thermal dynamic formula to optimize the exchange, using the surface area and number of loops of the copper, relative to the surface area and loops of the exchanger you are missing. But what do I know? My engineering degree is in computers, and they don't have engines.

I've wondered if you could use a Peltier device to make an air conditioner.

[Elliot Cannon]

I am going to try this with my heat exchanger installed in the fresh air box

Mark

I like this idea a lot. Are you having to cool outside air or can you recirculate the air that has already been cooled once?

(IMG:http://inlinethumb20.webshots.com/4947/2357708820057582025S500x500Q85.jpg)

(IMG:http://inlinethumb21.webshots.com/34196/2059648790057582025S500x500Q85.jpg)

[Elliot Cannon]

That is way cool! I actually had I colleague at work try something similar with his computer CPU.

The salt in the water will lower the boiling temperature and the freezing temperature of water which is why they put salt on the roads in the winter and you put salt in the water when you're making pasta. The pasta doesn't taste any different, they just believe it will come out better if the water that's cooking it isn't 100 degrees C. Water will come to a boil faster too.

It also changes the specific heat of the water which means it will absorb heat more redily and quickly but you will melt your ice faster so you should get a lot of cooling but your system will "burn out" quickly.

The best thing for a long trip is to have the cooler in a freezer so it's already cold and fill it to the top with pure ice cubes. If it's already cold you won't waste cooling power bringing the inside of your cooler down to temperature. The ice will melt and the water will be at 0 C instead of putting an ice/water mixture in and having the water rob you of cooling power as the ice brings it down to 0.

Some problems you may have is that when the ice melts your cooling coils may not be fully submerged. You'll have to test it out. If you're going on a short drive I would put the water and ice mixture in there just like you planned.

Your heat exchanger is going to create a lot of water from condensation so you may have a puddle in the trunk or where ever your going to put it.

My plan was to use water with ice in it. That way the copper coils will always be covered. I will use a drain hole so any condensation from the heat exchanger will drain back into the cooler. It will be interesting to see how long the ice will last. I'm thinking about 4 hours but that's just a guess. Mini-marts don't seem to be that far apart even on the interstate. Seems like every service ahhhh I mean gas station is also a mini-mart as well. Obtaining ice shouldn't be a problem.
Cheers, Elliot

[Aaron Cox]

so thats what retired people do.... Spend money to build things to keep themselves busy (IMG:style_emoticons/default/smile.gif)






Yeah.. it looks like it may work. And it looks like you had fun

[ClayPerrine]

Nice idea.. but it seems like a lot of work for so little gain.

Did you ever consider putting an AC unit on the car??? (IMG:style_emoticons/default/poke.gif)


Betty can just reach over and turn her AC on anytime, and it gets cool. Plus it helps pull the moisture out of the air on a rainy day, making the windshield stay clear.


So much for the statement "You don't need AC in a 914.. just take the top off." that I have been hearing out of the Cali contingent for years. (IMG:style_emoticons/default/poke.gif)

[MoveQik]

Did you ever consider putting an AC unit on the car??? (IMG:style_emoticons/default/poke.gif)

Speaking of which....did that guy in Hurst, TX ever come up with a turn key AC system for /6's? (IMG:style_emoticons/default/poke.gif) Summer is upon us here in AZ.

[ClayPerrine]

Did you ever consider putting an AC unit on the car??? (IMG:style_emoticons/default/poke.gif)

Speaking of which....did that guy in Hurst, TX ever come up with a turn key AC system for /6's? (IMG:style_emoticons/default/poke.gif) Summer is upon us here in AZ.

It's on hold until I get some other things done at home. Gotta keep Betty happy. (IMG:style_emoticons/default/whip[1].gif)