Good call on the jic adapter welding and plate mfg recommendations, I will do some more searching there. I am also interested in dx cooling my processing recovery tubes as well.
Excerpt from the DX thread previously linked:
So Im not exactly understanding how it wont be stealing much mass if you grossly oversize the evaporator. Is there downsides? The inside jacket surface area is much greater than say a 1/2 ton bphx.
I was reading this document from MIT on a compressor selection program they’ve written. http://web.mit.edu/parmstr/Public/hvac/compressor/Carlyle/CarwinDocumentation.pdf
It has some good info on learning what some of the performance data means and what determines or influences capacity of the compressor and how that relates to the evaporators refrigeration effect.
Im sure what Im not getting is right before me, but it hasnt fully clicked yet, I think I have to re read the mit doc several more times.
“As superheat increases, Hsh increases &
Evaporator Refrigeration Effect increases (as long
as the superheat does not become higher than the
desired cooling temperature for the unit)”
“as long as the superheat does not become higher than the desired cooling temperature for the unit”
if 5°F to 10°F is normal super heat, and the desired cooling temp for the unit is -40. I dont understand.
This also is not clicking yet:
"Lowering the return gas temperature will
increase the density entering the
compressor, thus increasing the evaporator
mass flow. This will increase the evaporator
refrigeration effect. Increasing the
evaporator mass flow will also increase
compressor capacity but the return gas
temperature enthalpy (Hrgt) will decrease
reducing the change in enthalpy. This leads to a lower
compressor capacity. In most instances,
the enthalpy decrease will be greater than the mass flow
increase which will result in lower compressor capacities. "
Bascially trying to understand what determines the enthalpy decrease vs mass flow increase, cause it sounds like an easy way to increase capacity is to lower the return gas temps from the standard 65f, which in my cold ass location should be easy.