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Fluid: Shell and Tube Heat Exchanger Questions 1- What's the purpose of putting baffles on the...

Fluid: Shell and Tube Heat Exchanger Questions

1- What's the purpose of putting baffles on the shell side? How does having more baffles affect the shell fluid velocity? The flow rate? What about the total residence time the fluid spends in the shell? Explain your answers

2- Point where heat transfer occurs? Write formulas for that area

3- Write the Donahue equation for the Nusselt No. (dimensionless heat transfer coefficient) correlation for the shell side. It is valid for Re down ~400. Why do you think it works for such small Re?

4- What do the terms parallel and cross flow mean, and at what points in the shell and tube exchanges would you find parallel flow and cross flow?

5- Determine a formula for the area available for cross flow, A_cross. Draw a sketch and discuss and then do the actual formula

6- Determine the area for parallel flow, A_parallel, in the baffle window. Draw a sketch and discuss and then do the actual formula

7- Explain how the areas are used in the correlation for the shell side heat transfer coefficient.

8- Write the formula for Nusselt No. on the tube side.

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Expert Solution

Amanda K answered 2 years ago
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