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SAMINA GULSHAN 2006-CHEM-90 HUMERA AMEER 2006-CHEM-100

GROUP MEMBERS. SAMINA GULSHAN 2006-CHEM-90 HUMERA AMEER 2006-CHEM-100. Discussion. Diagram Internal parts Flow arrangements Particular applications Comparison with conventional shall and tube heat exchanger Limitations. Flow arrangement. Flow Arrangements .

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SAMINA GULSHAN 2006-CHEM-90 HUMERA AMEER 2006-CHEM-100

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  1. GROUP MEMBERS SAMINA GULSHAN 2006-CHEM-90HUMERA AMEER 2006-CHEM-100 engineering-resource.com

  2. Discussion Diagram Internal parts Flow arrangements Particular applications Comparison with conventional shall and tube heat exchanger Limitations engineering-resource.com

  3. engineering-resource.com

  4. Flow arrangement engineering-resource.com

  5. Flow Arrangements Various tube layouts have been devised in order to improve the efficiency of the cross flow heat exchanger and thereby reduce the physical size for a given heat transfer rate. However, the objective of all of the arrangements is to promote turbulence in the fluid flowing across the tube bundle. • In cross flow heat exchanger fluids travel perpendicularly to one another. • Heat is transferred between a fluid flowing through bundle of tubes and another fluid flowing transversely over the outside of the tubes engineering-resource.com

  6. Flow arrangement in tube type cross flow heat exchanger (mixed flow) High rate of heat transfer is obtained by turbulence, therefore the tube layout may be changed in order to maximize turbulence. This is achieved by ensuring that each row of tubes is positioned such that turbulence induced by the preceding row is incident upon the next row. Hence a cascade effect is produced such that the degree of turbulence increases with the depth of the tube bundle. engineering-resource.com

  7. Flow arrangement in plat type cross flow heat exchanger (unmixed flow) engineering-resource.com

  8. Comparison with conventional shall and tube heat exchanger • The ratio of surface area to its volume which is called area density is large, means more heat transfer area in small volume. • Small size and weight. • High rate of heat transfer between two fluids. • The ratio of surface area to its volume is less due to relatively large surface area in large volume. • Relatively large size and weight. • Relatively less rate of heat transfer. engineering-resource.com

  9. Applications • Commonly used in gas-to-gas and gas-to-liquid (or liquid-to-gas) heat exchangers • Internal combustion engine radiators • Air heaters • Refrigeration evaporators • Condensers • Boiler super heaters engineering-resource.com

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