Phase changin' it...

[m0tion]

Is a dehumidifier with a 1/4HP compressor strong enough to run a chilled loop over a 226W peltier with? What kind of results can I expect?

[NorthernYankee]

One word, Nope. I just tried something similar, with a compressor from a full-sized fridge. The pelt just puts off too much heat for the compressor to deal with. The compressor may be strong enough for just the CPU. What is the compressors wattage rating? That will give more of an indication of its power.

--NY

[m0tion]

Well damn. I just found an on-line conversion utility (http://www.onlineconversion.com) and 1/4HP is 186.5W or 636BTUs. That sucks, now I know why it won't handle it, not near powerful enough... In order for this to work I'd need about a 1HP compressor (at least this is my calculation, I may be of here).

[m0tion]

Ok, i'm confused now. Take a look at this page. http://www.aqualogicinc.com/index.htm . They have a 1/4HP water chiller there (works on the same principle as a dehumidifier, a refridgerator, or an air-conditioner) and it is able to remove 3080BTUs or about 900W. So that really make me wonder... Please someone throw me some knowledge =).

[dicki]

the horse power thing i believe is the power of the motor turning the compressor

the actual ability of the system to cool depends on the refrigerant inside the cooling loop and the pressure drop between the 2 halves so i don't know how the first site came up with it's numbers without knowing those things...

to figure out if your system would work you need to check out the ratings of your cooling loop, printed somewhere on it (hopefully)

oh and welcome to the boards :)

dicki

[Player0]

I posted here before but it got poofed somehow...

Anyway...the compressors HP/Wattage rating isn't the same as the systems cooling capacity. Its related, a larger compressor usually means colder temps, but not the same thing.

With that said, 900w would be more than adequate in cooling a 226w pelt. Why it didnt work for NY, i dont know. Might have been an inefficiency somewhere, or the peltier was maxing out.

I wouldnt use a peltier with a compressor anyway.

[tripodal]

i was curious to know what types of phase changing cases are out there... the only one i know of is vapochill....

[fredperry]

And Prometeia and MX-EVA3

My Prometeia (http://users.pandora.be/bernadette.peeters1/Prometeia/100-0062_IMG.JPG)

MX-EVA3 (http://www.maxxxpert.com/english/product/eva/eva3.htm)

[m0tion]

Phase change cooling refers to any process that involves a liquid evaporating in order to transfer heat. May also be refered to as state change cooling or evaporative cooling.

[NorthernYankee]

Originally posted by Player0
With that said, 900w would be more than adequate in cooling a 226w pelt. Why it didnt work for NY, i dont know. Might have been an inefficiency somewhere, or the peltier was maxing out.

I believe I talked about this in my other thread, The compressor that I have is a 190w, and efficiancy with Phase change is around 1.5 so that is 285w. With a 226w pelt and a 2 gig palyy I was seriously overpowering it, thats why i ditched the pelt.

The compressor that is mentioned as 900w is probably an R404A unit which are generally very expensive, R-12 which is what I have is a lot cheaper and does the job I need it to do.

--NY

[m0tion]

Actually the 1/4HP system I mentioned and gave a link for above uses R134A.

[tripodal]

thanks for the info