A counter-flow double pipe heat exchanger shown in the figure below is to heat water from 20°C to 100°C at the rate of 1.2kg/s. The heating is to be accomplished by geothermal water available at 160°C at a mass flow rate of 2kg/s. the inner tube is thin-walled and has a diameter of 1.5 cm. If the overall heat transfer coefficient of the heat exchanger is 640W/m2. °C. The specific heat capacities of the water and geothermal are 4.18 KJ/Kc °C and 4.13 KJ/Kg.°C respectively. Determine the difference in the hot water temperature going into the exchanger and cold water temperature out from the exchanger. Hot geothermal 160°C water 2 kg/s Cold water 20°C 100 °C 1.2 kg/s D 1.5 cm Select one: O a. 600°C O b. 60°C O c. 30°C O d. 6°C

A counter-flow double pipe heat exchanger shown in the figure below is to heat water from 20°C to 100°C at the rate of 1.2kg/s. The heating is to be accomplished by geothermal water available at 160°C at a mass flow rate of 2kg/s. the inner tube is thin-walled and has a diameter of 1.5 cm. If the overall heat transfer coefficient of the heat exchanger is 640W/m2. °C. The specific heat capacities of the water and geothermal are 4.18 KJ/Kc °C and 4.13 KJ/Kg.°C respectively. Determine the difference in the hot water temperature going into the exchanger and cold water temperature out from the exchanger. Hot geothermal 160°C water 2 kg/s Cold water 20°C 100 °C 1.2 kg/s D 1.5 cm Select one: O a. 600°C O b. 60°C O c. 30°C O d. 6°C

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter10: Heat Exchangers

Section: Chapter Questions

Problem 10.32P

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