A refrigerating plant operating with a reciprocating compressor using R134a is to be built. The required cooling capacit
Posted: Mon May 02, 2022 3:48 pm
A refrigerating plant operating with a reciprocating compressor using R134a is to be
built. The required cooling capacity is 25 kW at evaporating temperature of -20C.
Suction superheat at exit of evaporator shall be 10 °C. Condensing temperature shall be
40 °C and the condensate is sub-cooled in the condenser by 10 ° C. Using the p-h chart.
calculate the necessary swept volume and the input power of the compressor, condenser
heat load and the plant COP. Assume that the isentropic and volumetric efficiencies of
the compressor are 65 % and 60 % respectively and the heat loss from the compressor
corresponds to I5% of the input shaft power.
built. The required cooling capacity is 25 kW at evaporating temperature of -20C.
Suction superheat at exit of evaporator shall be 10 °C. Condensing temperature shall be
40 °C and the condensate is sub-cooled in the condenser by 10 ° C. Using the p-h chart.
calculate the necessary swept volume and the input power of the compressor, condenser
heat load and the plant COP. Assume that the isentropic and volumetric efficiencies of
the compressor are 65 % and 60 % respectively and the heat loss from the compressor
corresponds to I5% of the input shaft power.