404 is more efficient in low temp applications. 404 is a blend meant to replace 502. 134 is used in more medium temp applications, but it could be used. You may wish to check out one of the refrigerant websites. Dupont has some good info.
Mike
It depends on the manufacturer...you will need to contact the manufacturer to see if they would supply copper in the same thicknesses (.0045", .0055", etc). Also, you might want to make sure the same pattern for the tubes will exist for the copper fin patterns.
From there, you...
Well, let me explain my last response a little more. I am uncertain by what you are discussing when you say "foamed".
Also, are you not using any fan to move the air? If you are using a fan, what's the CFM/FPM?
When you say wrapped around the inside and outside wall...are you...
What type of exchangers are you using...aluminum fin with copper tube or something else? Please let me know more, and we'll see if I have anything to offer.
Mike
I recall locating soil thermal conductivity properties through the Oak Ridge National Lab. Try the database search at www.ornl.gov. Also, I would suggest locating or speaking to someone knowledgable in geothermal heat pump system. It would be worth a try. Good luck
You say that you can only use convection...have you considered using heat pipe technology? A good website for heat pipe info is www.thermacore.com
Again just an idea...good luck.
Considering a basic, relatively small (1/5 ton) condenser/txv/evaporator/compressor refrigeration system, does any standard for the minimum refrigerant fluid velocity for compressor oil return exist? The tubing would be copper with diameters less than 3/8" OD. I can locate the rule of...
Considering a basic, relatively small (1/5 ton) condenser/txv/evaporator/compressor refrigeration system, does any standard for the minimum refrigerant fluid velocity for compressor oil return exist? The tubing would be copper with diameters less than 3/8" OD. I can locate the rule of...
