 Thinking about A/C, Its getting hot... |
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| Dr Evil |
 Jul 21 2006, 06:12 PM
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#21
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Send me your transmission!  Group: Members Posts: 22,993 Joined: 21-November 03 From: Loveland, OH 45140 Member No.: 1,372 Region Association: MidAtlantic Region 
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Ah, removable. I was kinda thinking about a system for my car (IMG:style_emoticons/default/biggrin.gif)
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| SpecialK |
Jul 21 2006, 06:31 PM
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#22
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aircraft surgeon Group: Benefactors Posts: 3,211 Joined: 15-March 04 From: Pacific, MO Member No.: 1,797  |
Here's my plan...
Instead of just letting the evap water run out onto the ground, use the chilled water for something constructive first. Run the condenser (compressor output) line (uninsulated copper) through a section of 1.25" PVC running the length of the longitudinal, prior to the condenser (for maximum heat transfer) that is supplied with cold water (condensation) from the evap coil. Have the condensation supply line at the top of the PVC pipe, and the drain at the 12 o'clock position at the other end also (when looking end-on) to allow the tube to fill with a constant supply of chilled water. It's actually a trick refridgerator manufactures use when they run the condenser line through the drain pan. It accomplishes two things: It cools the high pressure gas coming from the compressor, and assists in the evaporation of the condensation created during the defrost cycle. Prior to that, they soldered the capillary tube (the high pressure line just prior to the evap coil) directly to the outgoing side of the suction line (the line leaving the evaporator, but still able to "gain" heat before it got to the inlet of the compressor), effectively lowering the head pressure of the compressor, and saving electricity ( or HP in this case). Just a thought... (IMG:style_emoticons/default/idea.gif) |
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| SpecialK |
Jul 21 2006, 07:00 PM
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#23
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aircraft surgeon Group: Benefactors Posts: 3,211 Joined: 15-March 04 From: Pacific, MO Member No.: 1,797 |
P.S. - Since my home A/C requires a condensate pump to get the condensation to the drain, I think it will be my first guinea pig. I'll have to do a "before and after" on the head pressure, and amp draw, as proof of concept (it actually runs, unlike my 914). (IMG:style_emoticons/default/headbang.gif)
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| Andyrew |
Jul 21 2006, 10:23 PM
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#24
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Spooling.... Please wait Group: Members Posts: 13,376 Joined: 20-January 03 From: Riverbank, Ca Member No.: 172 Region Association: Northern California
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Im done at under 50.
Blows cold air. This is with JUST ice packs. Pics come tomorrow. |
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| WildBill |
Jul 22 2006, 09:23 AM
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#25
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Newbie Group: Members Posts: 44 Joined: 6-July 06 From: Palouse, WA Member No.: 6,391 |
We use these at work to cool pretty big equipment cabinets, I have been trying to figure out how to use one or two in my 914. They are capable of putting out below freezing air. The units we use cost around $175. http://www.exair.com/vortextube/vt_page.htm
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| Scott Carlberg |
Jul 22 2006, 05:02 PM
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#26
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Porsche MOTORSPORTS Group: Members Posts: 1,595 Joined: 17-April 03 From: Modesto, Ca Member No.: 580 |
QUOTE(Andyrew @ Jul 21 2006, 07:23 PM)  Im done at under 50. Blows cold air. This is with JUST ice packs. Pics come tomorrow. ..it's TRUE guys, Andrew did it! (IMG:style_emoticons/default/clap56.gif) I rode my bike to his house last nite, he showed the A/C unit in his kitchen. WOW, it's only 113 degrees here in Modesto today. (IMG:style_emoticons/default/blink.gif) (IMG:style_emoticons/default/barf.gif) back on topic: Andrew's a/c unit blew COLD COLD air. I *think* he said it was like $50-75. My Jetta could use one! (IMG:style_emoticons/default/biggrin.gif) |
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| Dr Evil |
Jul 22 2006, 05:53 PM
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#27
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Send me your transmission! Group: Members Posts: 22,993 Joined: 21-November 03 From: Loveland, OH 45140 Member No.: 1,372 Region Association: MidAtlantic Region
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| turboman808 |
Jul 22 2006, 06:02 PM
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#28
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Advanced Member Group: Members Posts: 2,718 Joined: 31-January 06 From: North Jersey Member No.: 5,505 Region Association: North East States |
QUOTE(WildBill @ Jul 22 2006, 07:23 AM) We use these at work to cool pretty big equipment cabinets, I have been trying to figure out how to use one or two in my 914. They are capable of putting out below freezing air. The units we use cost around $175. http://www.exair.com/vortextube/vt_page.htm Thats kinda interesting. What kind of power does it need to work? Looks like you can flip it around to have either hot or cold air. |
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| Chogokin |
Jul 22 2006, 06:08 PM
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#29
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Member Group: Members Posts: 173 Joined: 17-April 06 From: Pensacola, FL Member No.: 5,878 |
looks like it just takes an air compressor that can maintain 80-100 PSI, easier said than done in a teener... (IMG:style_emoticons/default/unsure.gif)
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| bondo |
Jul 22 2006, 06:14 PM
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#30
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Practicing my perpendicular parking Group: Members Posts: 4,277 Joined: 19-April 03 From: Los Osos, CA Member No.: 587 Region Association: Central California |
QUOTE(Chogokin @ Jul 22 2006, 05:08 PM) looks like it just takes an air compressor that can maintain 80-100 PSI, easier said than done in a teener... (IMG:style_emoticons/default/unsure.gif) They're loud too. They sound like your average compressed air blow gun. |
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| iamchappy |
Jul 22 2006, 06:39 PM
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#31
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It all happens so fast! Group: Members Posts: 4,893 Joined: 5-November 03 From: minnetonka, mn Member No.: 1,315 Region Association: Upper MidWest  |
I've been considering an ac unit in the car, I installed one in my brothers 914 about ten years ago I hated cutting a hole in the front trunk but after getting new lines made up and installing all the componets and charging the system, the thing blew ice.
With my 400hp turbo 6 engine a power robbing compressor wouldnt be a factor, if I could come across a very nice underdash unit I would install it. The only thing out there that I see that may work well for portable is the Swampy brand ice water pumper unit at 400 bucks. Still waiting for Andyrew to post his. |
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| WildBill |
Jul 23 2006, 01:34 PM
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#32
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Newbie Group: Members Posts: 44 Joined: 6-July 06 From: Palouse, WA Member No.: 6,391 |
QUOTE(bondo @ Jul 22 2006, 05:14 PM) QUOTE(Chogokin @ Jul 22 2006, 05:08 PM) looks like it just takes an air compressor that can maintain 80-100 PSI, easier said than done in a teener... (IMG:style_emoticons/default/unsure.gif) They're loud too. They sound like your average compressed air blow gun. Actually they will run on as little as 20psi and if you use their little mufflers they are almost silent. I have measured around 50db right on the device. I think you would need 35-45psi to make it worth it. I have a spare to play with at work so I will test sound/psi/cooling next week. I would like to figure out how to mount one or two in a box with a small compresser and use them for removable heating and cooling. |
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| Chogokin |
Jul 23 2006, 01:42 PM
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#33
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Member Group: Members Posts: 173 Joined: 17-April 06 From: Pensacola, FL Member No.: 5,878 |
if you figure it out, in a small enough unit, let me know, I need some COOL air!
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| Andyrew |
Jul 23 2006, 02:19 PM
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#34
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Spooling.... Please wait Group: Members Posts: 13,376 Joined: 20-January 03 From: Riverbank, Ca Member No.: 172 Region Association: Northern California
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The air was certanly cool... But, My fan was not strong enough and the tube was too big, so the air didnt push out at any decent speed. I need to get some RC airplane motor/fans. Those push a LOT of air.
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| Hammy |
Jul 23 2006, 02:30 PM
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#35
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mr. Wonderful Group: Members Posts: 1,826 Joined: 20-October 04 From: Columbia, California Member No.: 2,978 Region Association: Northern California |
QUOTE(Andyrew @ Jul 23 2006, 01:19 PM) The air was certanly cool... But, My fan was not strong enough and the tube was too big, so the air didnt push out at any decent speed. I need to get some RC airplane motor/fans. Those push a LOT of air. Pics anyway (IMG:style_emoticons/default/smile.gif) |
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| Andyrew |
Jul 23 2006, 02:34 PM
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#36
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Spooling.... Please wait Group: Members Posts: 13,376 Joined: 20-January 03 From: Riverbank, Ca Member No.: 172 Region Association: Northern California
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there comin
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| Demick |
Jul 23 2006, 03:02 PM
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#37
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Ernie made me do it! Group: Benefactors Posts: 2,312 Joined: 6-February 03 From: Pleasanton, CA Member No.: 257 |
Don't bother with the R/C ducted fans. They will be very, very noisy. Probably make sitting in the car with the noise more unbearable than the heat.
I don't know what size fans you currently have, but go with a larger fan (maybe 7" or 8" diameter), and it will push a lot more air with much lower noise. Or even better, if you can arrange to use an impeller, you'll do even better (air vs noise). Demick |
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| anthony |
Jul 23 2006, 03:46 PM
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#38
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2270 club Group: Benefactors Posts: 3,107 Joined: 1-February 03 From: SF Bay Area, CA Member No.: 218 |
QUOTE I will not rob any hp by putting on a compressor. (more belts to possibly fail) How much hp do you have with that V8? How much hp does a modern A/C compressor use? 5hp? |
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| Andyrew |
Jul 23 2006, 05:54 PM
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#39
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Spooling.... Please wait Group: Members Posts: 13,376 Joined: 20-January 03 From: Riverbank, Ca Member No.: 172 Region Association: Northern California
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Demick, I was running a 914 heater fan. Dual outlet type (the one in the engine bay) I can not FIND a fan that will work... I need it small enough as to not be able to take a passanger... Also, Its possible to slow those RC fans with resistors right? Send me a link to a fan you think might work.. I have looked everywhere.
Anthony, A/C compressors take percentages. like 5-10 percent. On a 350hp engine.. 15-35hp? My race engine will be 500hp. I dont want the extra belt on the engine, then the lines to run the a/c, the condenser, evaporator, bla bla bla bla.. Your talking another 100lbs of weight added to the car. NO. I will not run a standard a/c system. This system will be designed to be completely removable. |
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| Chogokin |
Jul 23 2006, 06:20 PM
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#40
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Member Group: Members Posts: 173 Joined: 17-April 06 From: Pensacola, FL Member No.: 5,878 |
have you thought about using a blower fan from the engine compartment? If you don't have your's anymore I'm sure someone in this club has an extra. I mean if it can blow hot air through the HE's then it should be able to do what you want... just a thought
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