A Piston-Cylinder system initially contains R-134a refrigerant at a temperature of 2.8 bar and 40°C and an initial volume of 0.1 m3. First, heat is transferred to the system by keeping the piston constant and this process is continued until the pressure is 3.2 bar. The process is then maintained by allowing the volume to change while the pressure is kept constant. At the end of this process, the temperature reaches 50°C. Assuming the state changes as if they are balanced, calculate; a) The mass of R-134a refrigerant in the system, b) The amount of heat transferred during the fixed volume process, c) The amount of heat transferred during constant pressure operation. d) Show the state changes on the P-v diagram.
A Piston-Cylinder system initially contains R-134a refrigerant at a temperature of 2.8 bar and 40°C and an initial volume of 0.1 m3. First, heat is transferred to the system by keeping the piston constant and this process is continued until the pressure is 3.2 bar. The process is then maintained by allowing the volume to change while the pressure is kept constant. At the end of this process, the temperature reaches 50°C. Assuming the state changes as if they are balanced, calculate; a) The mass of R-134a refrigerant in the system, b) The amount of heat transferred during the fixed volume process, c) The amount of heat transferred during constant pressure operation. d) Show the state changes on the P-v diagram.
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 Piston-Cylinder system initially contains R-134a refrigerant at a temperature of 2.8 bar and 40°C and an initial volume of 0.1 m3. First, heat is transferred to the system by keeping the piston constant and this process is continued until the pressure is 3.2 bar. The process is then maintained by allowing the volume to change while the pressure is kept constant. At the end of this process, the temperature reaches 50°C. Assuming the state changes as if they are balanced,
calculate;
a) The mass of R-134a refrigerant in the system,
b) The amount of heat transferred during the fixed volume process,
c) The amount of heat transferred during constant pressure operation.
d) Show the state changes on the P-v diagram.
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