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The engine oil at 150 degree Celsius is cooled to 80 degree Celsius in a parallel flow heat exchanger by water entering at 25 degree Celsius and leaving at 60 degree Celsius. Estimate the exchanger effectiveness
  • a)
    0.56
  • b)
    0.66
  • c)
    0.76
  • d)
    0.86
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
The engine oil at 150 degree Celsius is cooled to 80 degree Celsius in...
Effectiveness = (t h 1 – t h 2) C h /C MIN (t h 1 – t c 2).
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Most Upvoted Answer
The engine oil at 150 degree Celsius is cooled to 80 degree Celsius in...
Given data:
- Inlet temperature of engine oil (hot fluid), Th1 = 150 °C
- Outlet temperature of engine oil (hot fluid), Th2 = 80 °C
- Inlet temperature of water (cold fluid), Tc1 = 25 °C
- Outlet temperature of water (cold fluid), Tc2 = 60 °C

To calculate the effectiveness of the parallel flow heat exchanger, we can use the following formula:

ε = (Th1 - Tc1)/(Th1 - Tc2)

Here, ε is the effectiveness of the heat exchanger.

Calculation:
ε = (Th1 - Tc1)/(Th1 - Tc2)
ε = (150 - 25)/(150 - 60)
ε = 0.56

Therefore, the effectiveness of the heat exchanger is 0.56.

Answer: The correct option is (a) 0.56.
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The engine oil at 150 degree Celsius is cooled to 80 degree Celsius in a parallel flow heat exchanger by water entering at 25 degree Celsius and leaving at 60 degree Celsius. Estimate the exchanger effectivenessa)0.56b)0.66c)0.76d)0.86Correct answer is option 'A'. Can you explain this answer?
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