A counter-flow heat exchanger is used to cool oil (cp = 2.20 kJ/kg⋅ºC) from 110ºC to 85ºC at a rate of 0.75 kg/s by cold water (cp = 4.18 kJ/kg⋅ºC) that enters the heat exchanger at 20ºC at a rate of 0.6 kg/s. If the overall heat transfer coefficient is 800 W/m2⋅ºC, the heat transfer area of the heat exchanger is   a. 0.760 m2 b. 0.790 m2 c.   0.805 m2

Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN:9781305578296
Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Chapter44: Geothermal Heat Pumps
Section: Chapter Questions
Problem 1RQ: Geothermal heat pumps, or water-source heat pumps, are classified as either _____loop or _____loop...
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A counter-flow heat exchanger is used to cool oil (c= 2.20 kJ/kg⋅ºC) from 110ºC to 85ºC at a rate of 0.75 kg/s by cold water (c= 4.18 kJ/kg⋅ºC) that enters the heat exchanger at 20ºC at a rate of 0.6 kg/s. If the overall heat transfer coefficient is 800 W/m2⋅ºC, the heat transfer area of the heat exchanger is


 

a.

0.760 m2

b.

0.790 m2

c.

 

0.805 m2

d.

0.745 m2

e.

0.775 m

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