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Vol. 2.6 © 2020 Hanbell Precise Machinery Co., Ltd. All rights reserved
Compressor medium pressure formula
1. Water-cooled compressor intermediate pressure (absolute pressure) relationship
2. Heat pump compressor intermediate pressure (absolute pressure) relationship
1. RT-120~280
When IGV>0,
Pm=
1.025*(IGV%/IGV100%)^0.08*(Pe*Pc)^0.5
When IGV=0,
Pm=
1.025*0.82*(Pe*Pc)^0.5
E.g.,
Pe=
3.62 bar
where,
Pc=
9.63 bar
Pe=evaporator pressure
IGV=
100 %
Pc=condenser pressure
Pm=
6.05 bar
Pm=intermediate pressure
1. RT-111
When IGV>0,
Pm=
1.025*(IGV%/IGV100%)^0.5*(Pe*Pc)^0.5+Pe/Pc*1.9
When IGV=0,
Pm=
1.025*0.82*(Pe*Pc)^0.5
E.g.,
Pe=
3.62 bar
where,
Pc=
11.9 bar
Pe=evaporator pressure
IGV=
50 %
Pc=condenser pressure
Pm=
7.08 bar
Pm=intermediate pressure
2. RT-161,221
When IGV>0,
Pm=
1.025*(IGV%/IGV100%)^0.035*(Pe*Pc)^0.5+Pe/Pc*0.55
When IGV=0,
Pm=
1.025*0.9*(Pe*Pc)^0.5+Pe/Pc*0.55
E.g.,
Pe=
3.62 bar
where,
Pc=
11.9 bar
Pe=evaporator pressure
IGV=
50 %
Pc=condenser pressure
Pm=
6.74 bar
Pm=intermediate pressure
