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Compressor Sizing Calculator

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Input Parameters

Unit System

Results

Compressor Sizing

48,000
Compressor Capacity BTU/hr
7,685
Compressor Power BTU/hr
94
Volumetric Efficiency %
720
Mass Flow Rate lb/hr

Compressor Breakdown

Compressor Capacity48,000 BTU/hr(100%)
Compressor Power7,685 BTU/hr(48%)
Volumetric Efficiency94.2 %(94%)

Compressor Performance

Calculation Steps

1

Calculate Pressure Ratio

Formula:
PR=TcondTevapPR = \frac{T_{cond}}{T_{evap}}
Calculation:
PR=579.7499.7PR = \frac{579.7}{499.7}
Result:
1.16 1.16 \text{ }
2

Calculate COP

Formula:
COP=TevapTcond−TevapCOP = \frac{T_{evap}}{T_{cond} - T_{evap}}
Calculation:
COP=499.7579.7−499.7COP = \frac{499.7}{579.7 - 499.7}
Result:
6.25 6.25 \text{ }
3

Calculate Compressor Capacity

Formula:
Qcomp=QloadηcompQ_{comp} = \frac{Q_{load}}{\eta_{comp}}
Calculation:
Qcomp=360000.75Q_{comp} = \frac{36000}{0.75}
Result:
48000 BTU/hr48000 \text{ BTU/hr}
4

Calculate Compressor Power

Formula:
P=QcompCOPP = \frac{Q_{comp}}{COP}
Calculation:
P=480006.25P = \frac{48000}{6.25}
Result:
7685 BTU/hr7685 \text{ BTU/hr}
5

Calculate Volumetric Efficiency

Formula:
ηv=0.95−0.05(PR−1)\eta_v = 0.95 - 0.05(PR - 1)
Calculation:
ηv=0.95−0.05(1.16−1)\eta_v = 0.95 - 0.05(1.16 - 1)
Result:
94.2 \text{ %}