ECO Compact Condensers
Air Cooled Condenser Selection
Condenser capacity required
The capacity that is required can be obtained with the following formula:
Qcond = Qevap x Fc
where:
Qcond = Condenser capacity required
Qevap = Evaporating capacity at running conditions
Fc = Coefficient resulting from the type of compressor used and based on the operating conditions (Tab 1 or 2)
Example
- Qevap = 82kw
- Evap. temperature = -20ºC
- Condensing temperature = 45ºC
- Semi hermetic compressor
- Qcond = 82 x 1.48 = 121.36kW
Capacity Calculation
The capacity of the condenser, with conditions that differ from the reference conditions can be obtained with the following formula:
Qcond = QcondSTD x K1 x K2 x K3 x K4 x K5
where:
Qcond = Condenser capacity
QcondSTD = Condenser capacity in reference conditions (technical features tables)
K1 (tab3) = Coefficient referred to TD
K2 (tab4) = Coefficient referred to the refrigerant used
K3 (tab5) = Coefficient referred to air temperature
K4 (tab6) = Coefficient referred to installation altitude
K5 (tab7) = Coefficient refered to fin material
The condenser can be selected starting from the required capacity with the following formula which states the performance at
reference conditions
Qcond Qevap x fc
QcondSTD = =
K1xK2xK3xK4xK5 K1xK2xK3xK4xK5
Selection examples
Selection of an ACE model
- Type of compressor = semi hermetic
- Refrigerant = R22
- Cooling capacity of the evaporator = 8700W
- Evaporating temperature = -30ºC
- Condensing temperature = +40ºC
- Air temperature = +30ºC
- Installation altitude = 600m
- Maximum sound pressure level at 5m = 39dB(A)
- TD = 40 - 30 = 10K
- Fc = 1.58
- K1 = 0.67
- K2 = 0.96
- K3 = 0.99
- K4 = 0.96
- K5 = 1.00
8700 x 1.58
QcondSTD = = 22487 W
0.67 x 0.96 x 0.99 x 0.96 x 1.00
37
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