A mechanical refrigerating system employing R-134a is operated under such conditions that the evaporator temperature is 4 oC and the temperature of the liquid at the refrigerant control is 42 oC, determine the following: a) The properties of p, T, v, h and s for the state points A,B,C,D and E. b) The compressor displacement in L/s required per kilowatt of refrigerant capacity. c) The theoretical power in watts required per kilowatt of refrigerant capacity. d) The total heat rejected at the condenser in kilowatts per kilowatt of the refrigerant capacity. e) The c.o.p of the cycle.

A mechanical refrigerating system employing R-134a is operated under such conditions that the evaporator temperature is 4 oC and the temperature of the liquid at the refrigerant control is 42 oC, determine the following: a) The properties of p, T, v, h and s for the state points A,B,C,D and E. b) The compressor displacement in L/s required per kilowatt of refrigerant capacity. c) The theoretical power in watts required per kilowatt of refrigerant capacity. d) The total heat rejected at the condenser in kilowatts per kilowatt of the refrigerant capacity. e) The c.o.p of the cycle.

Welding: Principles and Applications (MindTap Course List)

8th Edition

ISBN:9781305494695

Author:Larry Jeffus

Publisher:Larry Jeffus

Chapter30: Other Welding Processes

Section: Chapter Questions

Problem 48R: Why is THSP known as a cold buildup process?

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