Mechanical Engineering Exam  >  Mechanical Engineering Videos  >  Topper Handwritten Notes & Videos for GATE ME  >  Effectiveness of Parallel Flow Heat exchanger HMT Tutorial- 12, Heat and Mass Transfer, GATE

Effectiveness of Parallel Flow Heat exchanger HMT Tutorial- 12, Heat and Mass Transfer, GATE Video Lecture | Topper Handwritten Notes & Videos for GATE ME - Mechanical Engineering

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FAQs on Effectiveness of Parallel Flow Heat exchanger HMT Tutorial- 12, Heat and Mass Transfer, GATE Video Lecture - Topper Handwritten Notes & Videos for GATE ME - Mechanical Engineering

1. What is a parallel flow heat exchanger?
Ans. A parallel flow heat exchanger is a type of heat exchanger where the hot and cold fluids flow in the same direction. Both fluids enter the heat exchanger at the same end and exit at the same end, resulting in a parallel flow pattern. This allows for efficient heat transfer between the fluids.
2. How does a parallel flow heat exchanger work?
Ans. In a parallel flow heat exchanger, the hot fluid enters at one end and the cold fluid enters at the same end. As the fluids flow in the same direction, heat is transferred from the hot fluid to the cold fluid through the walls of the heat exchanger. The hot fluid gradually cools down while the cold fluid gets heated up. Both fluids exit the heat exchanger at the other end.
3. What are the advantages of a parallel flow heat exchanger?
Ans. Some advantages of a parallel flow heat exchanger include: - High heat transfer efficiency due to the counter-current flow pattern. - Compact design, requiring less space. - Lower pressure drop in comparison to other types of heat exchangers. - Easy maintenance and cleaning due to the simple flow path.
4. What are the limitations of a parallel flow heat exchanger?
Ans. Some limitations of a parallel flow heat exchanger are: - Limited temperature difference between the hot and cold fluids due to the parallel flow pattern, which may reduce the overall heat transfer. - High sensitivity to temperature variations, as even small changes can significantly affect the heat transfer performance. - Less effective for heat exchange between fluids with large temperature differences.
5. How can the effectiveness of a parallel flow heat exchanger be improved?
Ans. The effectiveness of a parallel flow heat exchanger can be improved by: - Increasing the surface area of the heat exchanger to enhance heat transfer. - Using fins or turbulators inside the heat exchanger to increase turbulence and improve heat transfer. - Increasing the flow velocity of the fluids to promote better mixing and heat transfer. - Using materials with high thermal conductivity for the heat exchanger walls to enhance heat transfer efficiency.
59 videos|196 docs
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