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/Kg. °C and 4.13 KJ/Kg.°C respectively. Determine the length of the heat exchanger required to achieve the desired heating. 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. 17.627 m O b. 17627 m O c. 1.7627 m O d. 176.27 m

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/Kg. °C and 4.13 KJ/Kg.°C respectively. Determine the length of the heat exchanger required to achieve the desired heating. 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. 17.627 m O b. 17627 m O c. 1.7627 m O d. 176.27 m

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 10.14P

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