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For the same inlet and outlet temperatures of hot and cold fluids, theLog Mean Temperature Difference (LMTD) is:
- a)Greater for parallel flow heat exchanger than for counter flow heatexchanger.
- b)Greater for counter flow heat exchanger than for parallel flow heatexchanger.
- c)Same for both parallel and counter flow heat exchangers.
- d)Dependent on the properties of the fluids.
Correct answer is option 'B'. Can you explain this answer?
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For the same inlet and outlet temperatures of hot and cold fluids, the...
Ans. (b)
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For the same inlet and outlet temperatures of hot and cold fluids, the...
Explanation:
The Log Mean Temperature Difference (LMTD) is a measure of the difference in temperature between the hot and cold fluids in a heat exchanger. It is used to calculate the heat transfer rate in the heat exchanger, and it is an important parameter in the design of heat exchangers.
The LMTD is dependent on the flow arrangement of the hot and cold fluids in the heat exchanger. There are two basic flow arrangements in a heat exchanger: parallel flow and counterflow.
Parallel flow heat exchanger: In a parallel flow heat exchanger, the hot and cold fluids flow in the same direction. This means that the hot fluid enters the heat exchanger at the same end as the cold fluid and both fluids exit at the same end.
Counterflow heat exchanger: In a counterflow heat exchanger, the hot and cold fluids flow in opposite directions. This means that the hot fluid enters the heat exchanger at one end and the cold fluid enters at the other end. The hot fluid exits the heat exchanger at the same end as the cold fluid.
The LMTD is greater for a counterflow heat exchanger than for a parallel flow heat exchanger. This is because in a counterflow heat exchanger, the temperature difference between the hot and cold fluids is greater at the beginning of the heat exchanger, where the temperature difference is the most important for heat transfer. In a parallel flow heat exchanger, the temperature difference between the hot and cold fluids is more uniform throughout the length of the heat exchanger, so the LMTD is smaller.
Conclusion:
In conclusion, the Log Mean Temperature Difference (LMTD) is greater for a counterflow heat exchanger than for a parallel flow heat exchanger. This is because of the difference in the flow arrangement of the hot and cold fluids in the two types of heat exchangers. The LMTD is an important parameter in the design of heat exchangers and is used to calculate the heat transfer rate in the heat exchanger.
The Log Mean Temperature Difference (LMTD) is a measure of the difference in temperature between the hot and cold fluids in a heat exchanger. It is used to calculate the heat transfer rate in the heat exchanger, and it is an important parameter in the design of heat exchangers.
The LMTD is dependent on the flow arrangement of the hot and cold fluids in the heat exchanger. There are two basic flow arrangements in a heat exchanger: parallel flow and counterflow.
Parallel flow heat exchanger: In a parallel flow heat exchanger, the hot and cold fluids flow in the same direction. This means that the hot fluid enters the heat exchanger at the same end as the cold fluid and both fluids exit at the same end.
Counterflow heat exchanger: In a counterflow heat exchanger, the hot and cold fluids flow in opposite directions. This means that the hot fluid enters the heat exchanger at one end and the cold fluid enters at the other end. The hot fluid exits the heat exchanger at the same end as the cold fluid.
The LMTD is greater for a counterflow heat exchanger than for a parallel flow heat exchanger. This is because in a counterflow heat exchanger, the temperature difference between the hot and cold fluids is greater at the beginning of the heat exchanger, where the temperature difference is the most important for heat transfer. In a parallel flow heat exchanger, the temperature difference between the hot and cold fluids is more uniform throughout the length of the heat exchanger, so the LMTD is smaller.
Conclusion:
In conclusion, the Log Mean Temperature Difference (LMTD) is greater for a counterflow heat exchanger than for a parallel flow heat exchanger. This is because of the difference in the flow arrangement of the hot and cold fluids in the two types of heat exchangers. The LMTD is an important parameter in the design of heat exchangers and is used to calculate the heat transfer rate in the heat exchanger.
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For the same inlet and outlet temperatures of hot and cold fluids, the...
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For the same inlet and outlet temperatures of hot and cold fluids, theLog Mean Temperature Difference (LMTD) is:a)Greater for parallel flow heat exchanger than for counter flow heatexchanger.b)Greater for counter flow heat exchanger than for parallel flow heatexchanger.c)Same for both parallel and counter flow heat exchangers.d)Dependent on the properties of the fluids.Correct answer is option 'B'. Can you explain this answer?
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For the same inlet and outlet temperatures of hot and cold fluids, theLog Mean Temperature Difference (LMTD) is:a)Greater for parallel flow heat exchanger than for counter flow heatexchanger.b)Greater for counter flow heat exchanger than for parallel flow heatexchanger.c)Same for both parallel and counter flow heat exchangers.d)Dependent on the properties of the fluids.Correct 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 For the same inlet and outlet temperatures of hot and cold fluids, theLog Mean Temperature Difference (LMTD) is:a)Greater for parallel flow heat exchanger than for counter flow heatexchanger.b)Greater for counter flow heat exchanger than for parallel flow heatexchanger.c)Same for both parallel and counter flow heat exchangers.d)Dependent on the properties of the fluids.Correct 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 For the same inlet and outlet temperatures of hot and cold fluids, theLog Mean Temperature Difference (LMTD) is:a)Greater for parallel flow heat exchanger than for counter flow heatexchanger.b)Greater for counter flow heat exchanger than for parallel flow heatexchanger.c)Same for both parallel and counter flow heat exchangers.d)Dependent on the properties of the fluids.Correct answer is option 'B'. Can you explain this answer?.
For the same inlet and outlet temperatures of hot and cold fluids, theLog Mean Temperature Difference (LMTD) is:a)Greater for parallel flow heat exchanger than for counter flow heatexchanger.b)Greater for counter flow heat exchanger than for parallel flow heatexchanger.c)Same for both parallel and counter flow heat exchangers.d)Dependent on the properties of the fluids.Correct 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 For the same inlet and outlet temperatures of hot and cold fluids, theLog Mean Temperature Difference (LMTD) is:a)Greater for parallel flow heat exchanger than for counter flow heatexchanger.b)Greater for counter flow heat exchanger than for parallel flow heatexchanger.c)Same for both parallel and counter flow heat exchangers.d)Dependent on the properties of the fluids.Correct 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 For the same inlet and outlet temperatures of hot and cold fluids, theLog Mean Temperature Difference (LMTD) is:a)Greater for parallel flow heat exchanger than for counter flow heatexchanger.b)Greater for counter flow heat exchanger than for parallel flow heatexchanger.c)Same for both parallel and counter flow heat exchangers.d)Dependent on the properties of the fluids.Correct answer is option 'B'. Can you explain this answer?.
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