THERMODYNAMICS-SI ED. EBOOK >I<
9th Edition
ISBN: 9781307573022
Author: CENGEL
Publisher: MCG/CREATE
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Chapter 4.5, Problem 31P
A 0.5-m3 rigid tank contains refrigerant-134a initially at 160 kPa and 40 percent quality. Heat is now transferred to the refrigerant until the pressure reaches 700 kPa. Determine (a) the mass of the refrigerant in the tank and (b) the amount of heat transferred. Also, show the process on a P-V diagram with respect to saturation lines.
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A 0.5 m3 rigid tank contains refrigerant-134a initially at 200 kPa and 40
percent quality. Heat is now transferred to the refrigerant until the
pressure reaches 800 kPa. Determine (a) the mass of the refrigerant in
the tank and (b) the amount of heat transferred. Also, show the process
on a P-v diagram with respect to saturation lines.
4.
When a system that use refrigerant-134a at temperature of 95 C at pressure of 1.4 kPa is cooled at constant volume until the pressure is being reduced to 1.15 kPa.
(a) Show the process on a T-v diagram with respect to saturation lines.
(b) Determine the change in volume.
(c) Find the change in total internal energy.
Question 1
(a)
In the thermodynamic laboratory, student Ali prepared a piston-cylinder device which contains
refrigerant-134a at 1000 kPa and 50°C. The mass of the refrigerant is 6 kg. The next step of the
experiment involves cooling the refrigerant at constant pressure until its state become liquid at
24°C. Show the process on T-v diagram and determine the heat loss from the system.
Chapter 4 Solutions
THERMODYNAMICS-SI ED. EBOOK >I<
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