Saturated liquid R 134a with a flow rate of 0.05 kg / s at a temperature of 50 ° C is reduced to 200 kPa in a throttling valve, and then in a heat exchanger, R 134a firstly evaporates with the heat it receives from the other fluid and then heats up to 30 ° C at constant pressure. a) Find the quality value and temperature of the R 134a refrigerant after throttling. b) Find the heat given to the R 134a refrigerant in the heat exchanger. c) Calculate the water flow rate if the hot water coming from the boiler enters the heat exchanger at 40 ° C and leaves at 30 ° C.

Saturated liquid R 134a with a flow rate of 0.05 kg / s at a temperature of 50 ° C is reduced to 200 kPa in a throttling valve, and then in a heat exchanger, R 134a firstly evaporates with the heat it receives from the other fluid and then heats up to 30 ° C at constant pressure. a) Find the quality value and temperature of the R 134a refrigerant after throttling. b) Find the heat given to the R 134a refrigerant in the heat exchanger. c) Calculate the water flow rate if the hot water coming from the boiler enters the heat exchanger at 40 ° C and leaves at 30 ° C.

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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Question

Saturated liquid R 134a with a flow rate of 0.05 kg / s at a temperature of 50 ° C is reduced to 200 kPa
in a throttling valve, and then in a heat exchanger, R 134a firstly evaporates with the heat it receives
from the other fluid and then heats up to 30 ° C at constant pressure.
a) Find the quality value and temperature of the R 134a refrigerant after throttling.
b) Find the heat given to the R 134a refrigerant in the heat exchanger.
c) Calculate the water flow rate if the hot water coming from the boiler enters the heat exchanger at
40 ° C and leaves at 30 ° C.

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