Quote:
Originally Posted by buffalobillpatrick
This was posted on a Pro HVAC site:
"Even with that as I stated if you just recharge your old R22 system properly with R290 you will gain an over all efficiency increase of about 20% to 30%. "
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Hello, I have made my first attempt in DIY heatpumps with R-290 (topic #1767) :
http://ecorenovator.org/forum/geothe...festo-177.html
I had a small discussion about it (topics #1771 > #1774) with jeff5may and I'd also like to hear your comments and "capitalize" on your experience on R-290.
Here are a few questions:
- Do I need a bigger evaporator or a bigger TXV orifice, since the system had a bigger cooling capacity with R-22 than with R-290?
- What would be the optimum SubCool (for charging) and SuperHeat (for TXV regulation) for a R-290 retrofit with a suction line HX.
Thanks in advance!