simple water chiller... need help

[Fitseries3]

i know im a noob at this so thats why im asking for help.

can someone draw up a simple water chiller for me?

i have the following:

compressor
10 plate HX
condenser
various sized copper tubing

i have the tools/equipment to braze everything and i have a friend that can charge it with whatever refrigerant i need.

can someone please just draw up a simple schematic for me?

thanks in advance.

[teyber]

not great but this should work

[Fitseries3]

so if i go with a TXV i dont have to use a long cap tube? which is better? i assume you can tune a TXV?

also, is it possible to have some sort of control modual that keeps the water from getting too cold?

[teyber]

http://www.amazon.com/Modern-Refrige...318968&sr=8-10

you need to do some more research, study other builds, et cetera. thats a question that could be answered in 10's of pages lol

if you use a thermal expansion valve you don't use a cap tube. A txv tunes itself, you adjust it to the superheat you want. The control module would be a hot gas bypass system.(arhem- google)

cheers

[Fitseries3]

http://www.amazon.com/Modern-Refrige...318968&sr=8-10

you need to do some more research, study other builds, et cetera. thats a question that could be answered in 10's of pages lol

if you use a thermal expansion valve you don't use a cap tube. A txv tunes itself, you adjust it to the superheat you want. The control module would be a hot gas bypass system.(arhem- google)

cheers

thanks man. im half way through modern refrigeration. i've looked at all the builds here on xs but pics do no justice to show details. i assume that its pretty simple and im just thinking there is something im overlooking.

yes... i worded that question wrong... i meant to say "if i used a TXV instead of a cap tube...". you told me what i wanted to know though.

i'll google hot gas bypass system and see what i can find. sounds more complicated than what i want to get into on this simple chiller.

btw... do you(or anyone) have any of this stuff you could sell me? im starting to hate paying shipping from 9 different places on 1 part from each place.

[DetroitAC]

Hi fitseries3,
Do you know what performance you require from the chiller? i.e. what are you cooling, and how cold do you want it to be?

[Fitseries3]

im cooling i7 920 and x58 NB. i want water temps to stay below room temp even after hours or running benches. i benched 4.2ghz 8 hours yesturday and my 2 pa120.3s, 6 scythe 3k ultra kazes, and iwaki rd30 kept it running but the water temp was ~90F.

[DetroitAC]

Water temps below ambient will cause condensation problems unless you are controlling the water temperature to be above the dewpoint temperature, or insulating the tubing and waterblocks.

As for compressor size, that would be a very small unit. Check out my chiller, it's 1/6 hp and would handle your load. If your compressor is 1/6hp or bigger you'll need a strategy to control the capacity so you don't get too cold and have condensation. You could build a large water reservoir and cycle the compressor on/off or you could implement a controller and solenoid valve/HGBV like Teyber and I have done.

[Fitseries3]

the compressor i have for this build is a little bit smaller than the one you used. insulation is not a problem. i have my board insulated from when i ran my TEC.

would a D5 be enough power to push the water or should i use my iwaki rd30?

[DetroitAC]

I'm only guessing about the pumping power you need, as I obviously don't know what you're water loop is, and how restrictive the plate HX is...The D5 should be enough, especially with a Detroit top

You could of course use the Iwaki and have a huge flowrate, either will work, the Iwaki will work better.

[Utnorris]

I am using this to control my temps to keep them above dew point for my chiller:

http://www.coleparmer.com/Catalog/pr...sp?sku=9352010

Easy to set up. I used an AC to build mine and wanted to keep the temps below ambient but above the dew point which this will do, although I do have to calculate the dew point using this, http://www.radioshack.com/product/in...ductId=2049773 for humidity and this to calculate it http://www.lamtec.com/dew-point-calculator.htm.

Good luck with this.