A K-134a home refrigerator operates on a simple cycle at pressures L.8 bar-abs and 7.5 bar-abs. refrigerant mass flow-rate is 0.005 kg/s. Fill up Tables 3a and 36. Part 3. Calculation: Performance of a Simple Refrige Table Ja. Selected Thermodynamic properties of R-134a refrigerant according to the given eycle. kJ/ kg a Specific Enthalpy at suction A Specific volume at suction m n³/kg kJ /g-K 31 e Specific entropy at suction kJ/ kg h2 d Specific enthalpy at discharge kJ/kg e. Specific enthalpy after expansion h4 Table 3b. Performance of the home refrigerator according to its cycle of operation. kWatt a. Evaporator cooling capacity b Condenser heat rejection rate kWatt C. Power required by compressor W Comp kWatt d Volume displacement of compressor VCamp e Coefficient of Performance-Ref f Coefficient of Performance-Camot Li/s COP Ref COP RC & Flash-gas formed after expansion x4 kg / kg

Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN:9781305578296
Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Chapter45: Domestic Refrigerators And Freezers
Section: Chapter Questions
Problem 2RQ: The operating condition for the single compressor in a household refrigerator is the lowest box...
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A R-134a home refrigerator operates on a simple cycle at pressures 1.8 bar-abs and 7.5 bar-abs. The
refrigerant mass flow-rate is 0.005 kg/s. Fill up Tables 3a and 36.
Part 3. Calculation: Performance of a Simple Refrigeration Cycle.
Table Ja. Selected Thermodynamic properties of R-134a refrigerant according to the given cycle.
kJ/ kg
a Specific Enthalpy at suction
A Specific volume at suction
m/ kg
kJ /g-K
e Specific entropy at suction
d Specific enthalpy at discharge
Specific enthalpy after expansion hs4
31
kJ/ kg
kJ / kg
Table 3b. Performance of the home refrigerator according to its cycle of operation.
kWatt
a. Evaporator cooling capacity
b Condenser heat rejection rate
Q Cond
kWatt
Power required by compressor
W Comp
C.
kWatt
d Volume displacement of compressor
e. Coefficient of Performance-Ref
VCamp
Li/s
COP Ref
f Coefficient of Performance-Canot
COP RC
& Flash-gas formed after expansion
X4
kg / kg
%3D
Transcribed Image Text:A R-134a home refrigerator operates on a simple cycle at pressures 1.8 bar-abs and 7.5 bar-abs. The refrigerant mass flow-rate is 0.005 kg/s. Fill up Tables 3a and 36. Part 3. Calculation: Performance of a Simple Refrigeration Cycle. Table Ja. Selected Thermodynamic properties of R-134a refrigerant according to the given cycle. kJ/ kg a Specific Enthalpy at suction A Specific volume at suction m/ kg kJ /g-K e Specific entropy at suction d Specific enthalpy at discharge Specific enthalpy after expansion hs4 31 kJ/ kg kJ / kg Table 3b. Performance of the home refrigerator according to its cycle of operation. kWatt a. Evaporator cooling capacity b Condenser heat rejection rate Q Cond kWatt Power required by compressor W Comp C. kWatt d Volume displacement of compressor e. Coefficient of Performance-Ref VCamp Li/s COP Ref f Coefficient of Performance-Canot COP RC & Flash-gas formed after expansion X4 kg / kg %3D
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