A vapor-compression cycle is used as a refrigerator to extract 8 kW of heat from a cold space at 0°C and rejects heat into a space at 25°C. R-134a enters the compressor at 140 kPa superheated by 4°C above the saturation temperature and leaves at 900 kPa. It exits the condensor as a saturated liquid. Assume that pressure losses are negligible and that the compressor is isentropic. Report your answers to four significant digits using rounding. 1. Report the maximum possible COP. 2. Report the mass flow rate in kg/s. 3. Report the power required by the compressor. 4. Report the COP for the cycle.
A vapor-compression cycle is used as a refrigerator to extract 8 kW of heat from a cold space at 0°C and rejects heat into a space at 25°C. R-134a enters the compressor at 140 kPa superheated by 4°C above the saturation temperature and leaves at 900 kPa. It exits the condensor as a saturated liquid. Assume that pressure losses are negligible and that the compressor is isentropic. Report your answers to four significant digits using rounding. 1. Report the maximum possible COP. 2. Report the mass flow rate in kg/s. 3. Report the power required by the compressor. 4. Report the COP for the cycle.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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A vapor-compression cycle is used as a refrigerator to extract 8 kW of heat from a cold space at 0°C and rejects heat into a space at 25°C. R-134a enters the compressor at 140 kPa superheated by 4°C above the saturation temperature and leaves at 900 kPa. It exits the condensor as a saturated liquid. Assume that pressure losses are negligible and that the compressor is isentropic. Report your answers to four significant digits using rounding.
1. Report the maximum possible COP.
2. Report the mass flow rate in kg/s.
3. Report the power required by the compressor.
4. Report the COP for the cycle.
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