EML4304C Test 2A Spring 2011

EML4304C Test 2A Spring 2011 - EML 4304C Test 2 Open book...

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EML 4304C Test 2 Open book closed notes Name ____________________ Page 1 of 6 1) What is the enthalpy h 1 of the refrigerant just prior to the compressor? a) 392.28 kJ/kg b) 21.73 kJ/kg c) 386.08 kJ/kg d) 220.33 kJ/kg e) 173.74 kJ/kg f) 212.34 kJ/kg 1b) What is the enthalpy h 2 of the refrigerant just after the compressor? a) 445.72 kJ/kg b) 289.55 kJ/kg c) 441.89 kJ/kg d) 260.21 kJ/kg e) 445.22 kJ/kg f) 421.20 kJ/kg 1c ) If the flow enters the expansion valve as a saturated liquid, what is the enthalpy h 3 of the refrigerant as it enters the expansion valve? a) 255.56 kJ/kg b) 393.22 kJ/kg c) 372.81 kJ/kg d) 253.87 kJ/kg e) 101.32 kg/kg f) 275.6 kJ/kg 1d) The flow leaves the expansion valve and enters the evaporator as a mixed flow of unknown quality. What is the enthalpy h 4 of the refrigerant as it enters the evaporator? a) 255.56 kJ/kg b) 393.22 kJ/kg c) 372.81 kJ/kg d) 253.87 kJ/kg e) 101.32 kg/kg f) 275.6 kJ/kg 1e) What is the actual work w c of the compressor? a)
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EML4304C Test 2A Spring 2011 - EML 4304C Test 2 Open book...

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