(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. (b) A heat exchanger as shown in Figure 1 is used to cool water flowing in at 1 kg/s water, 10 kPa and quality 0.95 to saturated liquid at 10 kPa. The cooling fluid is water taken from a lake at 20°C and it exit the heat exchanger at 30°C. Calculate the flow rate of cooling water. Assume that the heat exchange is well insulated and there is no heat loss. 우 Lake water Figure 1: Heat exchanger

(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. (b) A heat exchanger as shown in Figure 1 is used to cool water flowing in at 1 kg/s water, 10 kPa and quality 0.95 to saturated liquid at 10 kPa. The cooling fluid is water taken from a lake at 20°C and it exit the heat exchanger at 30°C. Calculate the flow rate of cooling water. Assume that the heat exchange is well insulated and there is no heat loss. 우 Lake water Figure 1: Heat exchanger

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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