Water enters at 20 ℃ at a rate of 0.2 kg/s in a double-pipe parallel flow heat exchanger is to be heated to 60 ℃ by geothermal water that enters the heat exchanger at 145 ℃ at a rate of 0.3 kg/s. The overall heat transfer coefficient of the heat exchanger is 500 W/m2. ℃. The internal diameter of the tube is 1.2 cm. Determine the length of the heat exchanger. The specific heats of the water and geothermal water are given to be 4.18 and 4.31 kJ/kg.℃, respectively.Select one:a. 27.7 mb. 25.5 mc. 30.5 md. 20.2 m Water enters at 20 °C at a rate of 0.2 kg/sin a double-pipe parallel flow heatexchanger is to be heated to 60 °C bygeothermal water that enters the heatexchanger at 145 °C at a rate of 0.3 kg/s.The overall heat transfer coefficient of theheat exchanger is 500 W/m2. °C. Theinternal diameter of the tube is 1.2 cm.Determine the length of the heatexchanger. The specific heats of the waterand geothermal water are given to be 4.18and 4.31 kJ/kg.°C, respectively.Select one:а. 27.7 mb. 25.5 mс. 30.5 md. 20.2 m

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Answered: Water enters at 20 ℃ at a rate of 0.2…

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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Water enters at 20 ℃ at a rate of 0.2 kg/s in a double-pipe parallel flow heat exchanger is to be heated to 60 ℃ by geothermal water that enters the heat exchanger at 145 ℃ at a rate of 0.3 kg/s. The overall heat transfer coefficient of the heat exchanger is 500 W/m2. ℃. The internal diameter of the tube is 1.2 cm. Determine the length of the heat exchanger. The specific heats of the water and geothermal water are given to be 4.18 and 4.31 kJ/kg.℃, respectively. Select one: a. 27.7 m b. 25.5 m c. 30.5 m d. 20.2 m

Water enters at 20 °C at a rate of 0.2 kg/s
in a double-pipe parallel flow heat
exchanger is to be heated to 60 °C by
geothermal water that enters the heat
exchanger at 145 °C at a rate of 0.3 kg/s.
The overall heat transfer coefficient of the
heat exchanger is 500 W/m2. °C. The
internal diameter of the tube is 1.2 cm.
Determine the length of the heat
exchanger. The specific heats of the water
and geothermal water are given to be 4.18
and 4.31 kJ/kg.°C, respectively.
Select one:
а. 27.7 m
b. 25.5 m
с. 30.5 m
d. 20.2 m

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