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Originally Posted by redleader
Lot of problems with this idea:
1) CO2 is R744 not R707 
2) You can't condense CO2 in a single phase system, so you'll need to use some sort of cascade. Take a look at the condesing pressure of CO2 to get an idea what I mean.
3) CO2 is a pain to work with since it becomes dry ice rather easily.
4) You can't possibly expect a standard case (let alone one using hot glue!) to withstand that kind of pressure. Yes your evaporating pressure would only be about 1 ATM. But were you ever planning on turning it off and letting the low side be pulled to high side? Would the entire system detonating as soon as theres a power failure and the compressor switches off be a problem for you? If so . . .
5) You're going to be a LOT colder then 0C. More like -70 to -100 C depending on what your evaporating pressure is. You'll probably kill the board with those temps. |
I think you can condense CO2 in a single phase system. I am aware the pressure is 700psi, but you're seeing this refrigerant (R744 apparently) being implemented in cars for the express purpose of getting rid of other refrigierants due to the relative greenhouse gas/toxic issues of other refrigerants such as R134a. European regulations are set to ban these other refrigerants from being legal in autos there, so there is some considerable work being done on compact, portable implementations of this technology from the compressor side. I am not sure how intense of a power draw will be going on with such a system, but at least 1 HP I would guestimate, probably more.
Secondly, it should seem pretty obvious any implementation of this would not use a standard case of any kind, with hot glue to seal it no less. I have no idea of what left you with that impression from this discussion of that being a valid concept to begin with.