Q36-37. A thin-walled double-pipe counter-flow heat exchanger is used to cool oil (cp = 2.20 kJ/kg-°C) from 150°C to 40°C at a rate of 2 kg/s by water (cp = 4.18 kJ/kg-°C) that enters at 22°C at a rate of 1.5 kg/s. Hot oil Cold water 1.5 kg/s 22°C F40°C Q36. What is the approximate heat transfer by the oil? a. 8Qnet,in = +484 kW b. 80netin = -484 kW c. 8ộnet.out = +484 kW d. Both a and b e. Both b and c f. Both a and c Q37. What is the approximate heat transfer to the water? a. SQnet,in = +484 kW b. 8Qnetin = -484 kW c. 8Qnet,out = +484 kW d. Both a and b e. Both b and c f. Both a and c
Q36-37. A thin-walled double-pipe counter-flow heat exchanger is used to cool oil (cp = 2.20 kJ/kg-°C) from 150°C to 40°C at a rate of 2 kg/s by water (cp = 4.18 kJ/kg-°C) that enters at 22°C at a rate of 1.5 kg/s. Hot oil Cold water 1.5 kg/s 22°C F40°C Q36. What is the approximate heat transfer by the oil? a. 8Qnet,in = +484 kW b. 80netin = -484 kW c. 8ộnet.out = +484 kW d. Both a and b e. Both b and c f. Both a and c Q37. What is the approximate heat transfer to the water? a. SQnet,in = +484 kW b. 8Qnetin = -484 kW c. 8Qnet,out = +484 kW d. Both a and b e. Both b and c f. Both a and c
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
Related questions
Question
37
Transcribed Image Text:Q36-37. A thin-walled double-pipe counter-flow heat exchanger is used to cool oil (cp = 2.20 kJ/kg-°C)
from 150°C to 40°C at a rate of 2 kg/s by water (cp = 4.18 kJ/kg-°C) that enters at 22°C at a rate of
1.5 kg/s.
Hot oil
Cold
water
1.5 kg/s
22°C
F40°C
Q36. What is the approximate heat transfer by the oil?
a. 8Qnet,in = +484 kW
b. 80netin = -484 kW
c. 8ộnet.out = +484 kW
d. Both a and b
e. Both b and c
f. Both a and c
Q37. What is the approximate heat transfer to the water?
a. SQnet,in = +484 kW
b. 8Qnetin = -484 kW
c. 8Qnet,out
= +484 kW
d. Both a and b
e. Both b and c
f. Both a and c
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