Choosing the right condenser is essential for ensuring efficient operation of your refrigeration or cooling system. Follow the four-step process below to accurately calculate the required condenser capacity.

1. Determine the Required Heat Transfer Capacity

Refer to the table below based on condensing and evaporating temperatures to get the unit heat transfer capacity (kW/HP):

Unit Capacity Table (kW/HP)

2. Calculate Nominal Heat Transfer Capacity (Qn)

Apply the following correction factors:

K1: Temperature Difference Correction

ΔT = Condensing Temp - Inlet Air Temp

K2: Refrigerant Type Correction

K3: Inlet Air Temperature Correction

K4: Aluminum Fin Material Correction

Example Calculation

Design Conditions:

• Required cooling capacity (Qc): 50kW

• Ambient temperature: 35°C

• Condensing temperature: 45°C

• Refrigerant: R404A

• Aluminum fin: Coated

Step-by-step:

• ΔT=45-32=13K→from K1 table→K1=0.87

• Refrigerant R404A →from K2 table →K2 = 1.00

• Inlet air temperature 35°C→from K3 table →K3 =0.99

• Coated aluminum foil - from K4 table →K4 = 0.97

Final Calculation:

Qn = Qc/(K1 x K2 x K3 x K4)

Qn=50/(0.87 x1.00 x 0.99 x 0.97)= 77.7 kW

This means the nominal capacity required from the condenser is 77.7 kW under these specificconditions.