A long counter-flow heat exchanger cools water from 40°C to 10°C by passing the water via the inner cube through an enclosure of cold fluid. The water is flowing through a 3-cm diameter tube at a rate of 0.27 kg/s. The cold fluid enters the enclosure at -10°C and has a convection coefficient of 1200 W/m².K. The mass flow rate of the cold fluid and its specific heat are 1.2 kg/s and 1340 J/kg-K, respectively. (a) Assuming the flow is fully developed, find out the convection coefficient of the water flow. (b) What is the length of the heat exchanger? 1554 W/m²K 21.9m Water Cold Fluid
A long counter-flow heat exchanger cools water from 40°C to 10°C by passing the water via the inner cube through an enclosure of cold fluid. The water is flowing through a 3-cm diameter tube at a rate of 0.27 kg/s. The cold fluid enters the enclosure at -10°C and has a convection coefficient of 1200 W/m².K. The mass flow rate of the cold fluid and its specific heat are 1.2 kg/s and 1340 J/kg-K, respectively. (a) Assuming the flow is fully developed, find out the convection coefficient of the water flow. (b) What is the length of the heat exchanger? 1554 W/m²K 21.9m Water Cold Fluid
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.
Chapter7: Forced Convection Inside Tubes And Ducts
Section: Chapter Questions
Problem 7.4P
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![A long counter-flow heat exchanger cools water from 40°C to 10°C by passing the water via the inner
tube through an enclosure of cold fluid. The water is flowing through a 3-cm diameter tube at a rate of
0.27 kg/s. The cold fluid enters the enclosure at −10°C and has a convection coefficient of 1200 W/m².K.
The mass flow rate of the cold fluid and its specific heat are 1.2 kg/s and 1340 J/kg-K, respectively.
(a) Assuming the flow is fully developed, find out the convection coefficient of the water flow.
(b) What is the length of the heat exchanger?
1554 W/m²K
2
21.9m
Water
Cold Fluid](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F20000a63-5a8a-4b5e-adbd-85ecbf6c298b%2F95f8d212-2c21-4ec5-89f5-c4ca1305e546%2F5sc5fy_processed.png&w=3840&q=75)
Transcribed Image Text:A long counter-flow heat exchanger cools water from 40°C to 10°C by passing the water via the inner
tube through an enclosure of cold fluid. The water is flowing through a 3-cm diameter tube at a rate of
0.27 kg/s. The cold fluid enters the enclosure at −10°C and has a convection coefficient of 1200 W/m².K.
The mass flow rate of the cold fluid and its specific heat are 1.2 kg/s and 1340 J/kg-K, respectively.
(a) Assuming the flow is fully developed, find out the convection coefficient of the water flow.
(b) What is the length of the heat exchanger?
1554 W/m²K
2
21.9m
Water
Cold Fluid
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