R134a / Water Heat Exchanger Sizing

[The MG Pony]

A 6,000 BTU coaxial condenser is the most commonly used with good success.

[ACEprod]

MG Pony thanks for your reply,

I'm building the HE myself so I need the required surface area of copper pipes in order to deliver to the water 500 Watts of cooling load.

Thanks.

[The MG Pony]

If it is just for fun, research some of my old threads, other wise cheaper to simply buy a Hx.

http://www.refrigeration-engineer.com/forums/showthread.php?t=8150

Here you go.

[ACEprod]

I followed your advice and read some of your older posts and I discovered Dan Cap. :) I need to clear some things in my mind about refrigeration terms since I new at cooling things! My job is to warm things up not cool them so I need some help.

When a manufacturer refers to evaporating temperature does it refer to the refrigerant temp. during evaporation or the cooling fluid temp.?

Thanks once again.

[The MG Pony]

the refrigerant temp boiling inside the exchanger, it will need to be 6 or so degrees cooler then your desired fluid temp.

[ACEprod]

Thanks once again MG Pony

How can we calculate / predict the temperature of R134a at the different stages having an evaporating temp. of 10 C?