Think of building a Phase changer

[Ru4Wheelin]

What type of R134A there are two types auto and home use? Will R134A auto work? Got Two Frezzers not work they need R134a? Any help with is is great. Thanks

[Charles Wirth]

I use a 134A compressor from a freezer and automotive 134A for my drop in evaporator. Works fine and was a cheap way to start out. also easy to obtain gas and basic tools.

[Ru4Wheelin]

Will Start working on one. What are some of the Temp U are getting with the R134A? Car temps are only 40deg if u are lucky useing R134A. Would like to use R12 but to $$$$$$$$ to buy. again Thanks for the info.:banana:

[bowman1964]

well i dont use 134a but fugger is very right when he says a good way to start out.
so many guys want to jump right in to the phase change cooling .but if you want a killer system give yourself some time to learn and have fun.the best way to have fun learning, is not to spend a arm and a leg in parts and refridgerant.and i know a few people who use propaner290 and it is cheaper than r134a,but....if you are going to have fun you need to feal safe doing so.so just starting out get a can of r134s from anystore cheap and find you some old parts and go to town and have some fun.

good luck and be safe.spend a few months playing and the next system will be a killer unit,because you will know what you want and will have learned some good lessons.:toast: :toast:

[Charles Wirth]

It maxes out around -27c

I may try to add propane at some point.

[Ru4Wheelin]

Thanks What kind of compresser do u use for propane? When using propane is like using R134A.

[aenigma]

Yes don't use R134a for a starting refrigerant or well..ever. :)
It has bad properties, high boiling point, less heat capacity.Same goes for R12.Propane has a lower boiling point(-42f) and better heat capacity than both R12 and R134a.About 10 bucks for a 20lb tank of it too.

If your worried about using it, then make the system outside.Just keep flames away after it is charged.Use common sense and you won't have any problems.You will save alot of money too.

Propane will work in just about any compressor.

[Ru4Wheelin]

Reading Some of the forums. Ok Propane is the way to go with R134a! Need info on Block making, and condensor size? Thanks for the help!! :slobber: Would like Temps around -40f or better.

[Charles Wirth]

Its a cheap embarco, someone said it has a plastic piston.

Its quiet and works well.

[Ru4Wheelin]

Will Multilayered blocks Work vertically mounted? Thanks

[Icebreaker]

so are the Evap blocks like a Vapo different to normal water blocks?

[bowman1964]

Originally posted by Icebreaker
so are the Evap blocks like a Vapo different to normal water blocks?

well sorta....the blocks on the vapo are small chamber type blocks that spray refridgerant in a small area.so they dont need the large flow of a water block.water blocks need lots of flow and turberlance to pull heat from the block.
i have seen water blocks turned into evaperators for phase change cooling but they dont cool as well unless you really know what you are doing.you have to really fine turn there refridgerant.but they well get you to some very cold temps even then.
all copper water blocks works best with copper tops so you can brase the fittings on properly.:)