Air Cooled Condenser Design

[Samarjit Sen]

When the ambient temperature is 42 Deg. C and the designed condensing temperature of the compressor is 50 Deg. C, what should the air temperature on the condenser be considered. The Air Cooled Condenser shall be located outside in the open. The refrigerant is R 22

[Andy]

When the ambient temperature is 42 Deg. C and the designed condensing temperature of the compressor is 50 Deg. C, what should the air temperature on the condenser be considered. The Air Cooled Condenser shall be located outside in the open. The refrigerant is R 22


Hi Samarjit Sen:)

Ambient temperature in the warmest expected day is your air on. You should not hav eto allow for any air recirculation. If this happens baffles and air straightners on the fans will be required.

Your design has an 8K TD I usually deisn on 10 but then air never gets above 34 deg c in Ireland and seldom above 27 deg c:D

Kind Regards Andy:)

[US Iceman]

The ambient dry bulb temperature is considered the entering air temperature. This can only change if you have some air re-circulation back into the inlet side of the condenser, or if there is a warmer exhaust air stream entering the condenser.

If you want to know the exhaust air temperature, you need to know the exact entering air temperature, the exact heat rejection load going to the condenser, and the total volume of air flowing through the condenser. You have to do a heat balance to find the leaving air temp.

[Samarjit Sen]

Thank you Andy, I have designed my previous coils at 8 K and they are working efficiently.

[Lc_shi]

my previous coils at 8 K and they are working effi ciently.
8K is no problem but you need more heat exchanger surface. I don't know how about the RH of your place. Maybe evaporative consenser is more efficient:)

regards
LC