Optimal pressure drop in condensers and evaporators
Optimal pressure drop in condensers and evaporators
(OP)
Hallo to everybody.
Please, can anybody tell me if there are optimal pressure drops in a condenser and an evaporator as a function of different refrigerants ?
Is there a preferable circuit disposition depending on refrigerant type (ex: R407-C, R410A)...
thanks in advance for your help
Please, can anybody tell me if there are optimal pressure drops in a condenser and an evaporator as a function of different refrigerants ?
Is there a preferable circuit disposition depending on refrigerant type (ex: R407-C, R410A)...
thanks in advance for your help





RE: Optimal pressure drop in condensers and evaporators
I2I
RE: Optimal pressure drop in condensers and evaporators
I am a rusty now, especially with the newer refrigerants, but 407C must be similar to 22. No clue on the 410A
With R22 through the serpentine coils probably want a minimum of 10000 btu/circuit. I would guess about 3 psi max on the evap plus then you allow for the distributor tubes,distributer orifice, probably 30 to 60 psi drop with evap coil, distributor tubes and orifice.
Sporlan used to have a bulletin 20-10 on the distributers etc.
Maybe 5 psi on the condenser.
You allow for the pressure leaving the condenser, the drops through filter dryers, site glasses, solenoids,the piping to the evap.
You also subtact the suction piping loss, suction pressure in coil(what you hope it evaporates at}, then the coil/distributer pressure drop, and what you have left is the pressure to push the liquid through the expansion valve.
Pick out your valve based on the capacity at that much pressure and you are done like dinner.
RE: Optimal pressure drop in condensers and evaporators
1 - Mr. Insulttoinjury,
please, what do you mean for dependent on the heat exchanger geometry ? that for a pattern there is an optimum pressure drop while for a second one there is a second optimum pressure ?
2 - Mr. AbbyNormal
Thanks a lot.
For everybody: do you think that exist an optimal circuitation for every kind of refrigerant ?
Thanks in advance
RE: Optimal pressure drop in condensers and evaporators
I2I
RE: Optimal pressure drop in condensers and evaporators
RE: Optimal pressure drop in condensers and evaporators
TAB
RE: Optimal pressure drop in condensers and evaporators
So its a duty cycle and application driven answer. For AC duties, in a climate with 7000-plus HDD, first cost is going to drive the equation....If its case and storage cooling for a supermarket, the criteria will be different even in that climate.