Refrigerant-134a enters the compressor of a cooling system as superheated vapor at 0.18 MPa and 0°C with a flow rate of 0.15 kg/s. It exits the compressor at 0.8 MPa and 60°C. Post compression, the refrigerant is cooled in the condenser to 28°C and 0.7 MPa. Subsequently, it's throttled to 0.16 MPa. Neglecting any heat transfer and pressure drops in the pipelines between the components, represent the cycle on a T-s diagram concerning saturation lines. Calculate: (a) The rate of heat extraction from the cooling area and the energy input to the compressor. (b) The isentropic efficiency of the compressor. (c) The Coefficient of Performance (COP) of the cooling system.
Refrigerant-134a enters the compressor of a cooling system as superheated vapor at 0.18 MPa and 0°C with a flow rate of 0.15 kg/s. It exits the compressor at 0.8 MPa and 60°C. Post compression, the refrigerant is cooled in the condenser to 28°C and 0.7 MPa. Subsequently, it's throttled to 0.16 MPa. Neglecting any heat transfer and pressure drops in the pipelines between the components, represent the cycle on a T-s diagram concerning saturation lines. Calculate: (a) The rate of heat extraction from the cooling area and the energy input to the compressor. (b) The isentropic efficiency of the compressor. (c) The Coefficient of Performance (COP) of the cooling system.
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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Transcribed Image Text:Refrigerant-134a enters the compressor of a cooling system as superheated
vapor at 0.18 MPa and 0°C with a flow rate of 0.15 kg/s. It exits the compressor
at 0.8 MPa and 60°C. Post compression, the refrigerant is cooled in the
condenser to 28°C and 0.7 MPa. Subsequently, it's throttled to 0.16 MPa.
Neglecting any heat transfer and pressure drops in the pipelines between the
components, represent the cycle on a T-s diagram concerning saturation
lines.
Calculate:
(a) The rate of heat extraction from the cooling area and the energy input to the
compressor.
(b) The isentropic efficiency of the compressor.
(c) The Coefficient of Performance (COP) of the cooling system.
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