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An industrial gas (c = 1 kJ/kgK) enters a parallel flow heat exchanger at 250°C with a flow rate of 2 kg/s to heat a water stream. The water stream (c = 4 kJ/kgK) enters the heat exchanger at 50°C with a flow rate of 1 kg/s.The heat exchanger has an effectiveness of 0.75. The gas stream exit temperature will be
[2010]
- a)75°C
- b)100°C
- c)125°C
- d)150°C
Correct answer is option 'B'. Can you explain this answer?
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An industrial gas (c = 1 kJ/kgK) enters a parallel flow heat exchanger...
Th2 = 100°C
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An industrial gas (c = 1 kJ/kgK) enters a parallel flow heat exchanger...
°C with a mass flow rate of 5 kg/s. Water (c = 4.18 kJ/kgK) enters the heat exchanger at 15°C with a mass flow rate of 2 kg/s. The gases exit at 150°C and the water exits at 60°C. Determine the rate of heat transfer in the heat exchanger.
We can use the energy balance equation to determine the rate of heat transfer:
Q = m1*c1*(T1 - T2) = m2*c2*(T2 - T1)
where:
Q = rate of heat transfer
m1 = mass flow rate of gas
c1 = specific heat capacity of gas
T1 = inlet temperature of gas
T2 = outlet temperature of gas
m2 = mass flow rate of water
c2 = specific heat capacity of water
Substituting the given values, we have:
Q = 5*1*(250 - 150) = 500 kW (for the gas)
Q = 2*4.18*(60 - 15) = 418 kW (for the water)
The rate of heat transfer in the heat exchanger is the same for both fluids, so we can take the minimum of the two values:
Q = min(500, 418) = 418 kW
Therefore, the rate of heat transfer in the heat exchanger is 418 kW.
We can use the energy balance equation to determine the rate of heat transfer:
Q = m1*c1*(T1 - T2) = m2*c2*(T2 - T1)
where:
Q = rate of heat transfer
m1 = mass flow rate of gas
c1 = specific heat capacity of gas
T1 = inlet temperature of gas
T2 = outlet temperature of gas
m2 = mass flow rate of water
c2 = specific heat capacity of water
Substituting the given values, we have:
Q = 5*1*(250 - 150) = 500 kW (for the gas)
Q = 2*4.18*(60 - 15) = 418 kW (for the water)
The rate of heat transfer in the heat exchanger is the same for both fluids, so we can take the minimum of the two values:
Q = min(500, 418) = 418 kW
Therefore, the rate of heat transfer in the heat exchanger is 418 kW.
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An industrial gas (c = 1 kJ/kgK) enters a parallel flow heat exchanger at 250°C with a flow rate of 2 kg/s to heat a water stream. The water stream (c = 4 kJ/kgK) enters the heat exchanger at 50°C with a flow rate of 1 kg/s.The heat exchanger has an effectiveness of 0.75. The gas stream exit temperature will be[2010]a)75°Cb)100°Cc)125°Cd)150°CCorrect answer is option 'B'. Can you explain this answer?
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An industrial gas (c = 1 kJ/kgK) enters a parallel flow heat exchanger at 250°C with a flow rate of 2 kg/s to heat a water stream. The water stream (c = 4 kJ/kgK) enters the heat exchanger at 50°C with a flow rate of 1 kg/s.The heat exchanger has an effectiveness of 0.75. The gas stream exit temperature will be[2010]a)75°Cb)100°Cc)125°Cd)150°CCorrect answer is option 'B'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about An industrial gas (c = 1 kJ/kgK) enters a parallel flow heat exchanger at 250°C with a flow rate of 2 kg/s to heat a water stream. The water stream (c = 4 kJ/kgK) enters the heat exchanger at 50°C with a flow rate of 1 kg/s.The heat exchanger has an effectiveness of 0.75. The gas stream exit temperature will be[2010]a)75°Cb)100°Cc)125°Cd)150°CCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for An industrial gas (c = 1 kJ/kgK) enters a parallel flow heat exchanger at 250°C with a flow rate of 2 kg/s to heat a water stream. The water stream (c = 4 kJ/kgK) enters the heat exchanger at 50°C with a flow rate of 1 kg/s.The heat exchanger has an effectiveness of 0.75. The gas stream exit temperature will be[2010]a)75°Cb)100°Cc)125°Cd)150°CCorrect answer is option 'B'. Can you explain this answer?.
An industrial gas (c = 1 kJ/kgK) enters a parallel flow heat exchanger at 250°C with a flow rate of 2 kg/s to heat a water stream. The water stream (c = 4 kJ/kgK) enters the heat exchanger at 50°C with a flow rate of 1 kg/s.The heat exchanger has an effectiveness of 0.75. The gas stream exit temperature will be[2010]a)75°Cb)100°Cc)125°Cd)150°CCorrect answer is option 'B'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about An industrial gas (c = 1 kJ/kgK) enters a parallel flow heat exchanger at 250°C with a flow rate of 2 kg/s to heat a water stream. The water stream (c = 4 kJ/kgK) enters the heat exchanger at 50°C with a flow rate of 1 kg/s.The heat exchanger has an effectiveness of 0.75. The gas stream exit temperature will be[2010]a)75°Cb)100°Cc)125°Cd)150°CCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for An industrial gas (c = 1 kJ/kgK) enters a parallel flow heat exchanger at 250°C with a flow rate of 2 kg/s to heat a water stream. The water stream (c = 4 kJ/kgK) enters the heat exchanger at 50°C with a flow rate of 1 kg/s.The heat exchanger has an effectiveness of 0.75. The gas stream exit temperature will be[2010]a)75°Cb)100°Cc)125°Cd)150°CCorrect answer is option 'B'. Can you explain this answer?.
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