Design a new shell-and-tube heat exchanger

Assignment Help Mechanical Engineering

Reference no: EM131205805

General Description-

You have been tasked to design a new shell-and-tube heat exchanger for the chemical plant in which you work. The heat exchanger will utilize cooling water to cool Syltherm 800 (a heat transfer ?uid).

The Syltherm 800 is used in a certain process as a cooling medium, as the process operates at too high of a temperature to use water. The flow rate of Syltherm is 1,000,000 lbm/hr, and it exits the process at 500^oF. It must be cooled to 180^oF before being recycled to the process.

The cooling water used to cool the Syltherm 800 is available at 65^oF. For safety reasons, the maximum allowable water effluent temperature is 120^oF.

As a minimum, the following will need to be determined for this heat exchanger:

Which fluid is on shell-side/tube-side
Number of shell passes
Number of tube passes
Number of tubes
Tube pitch (center-to-center distance between tubes)
Tube size (ID and OD)
Shell size (ID only)
Total heat transfer area required
Length of the tube passes (can't be too long!)

When designing your heat exchanger, keep in mind the following:

It must be reasonably sized. If you get a tube length required of 1.5 km, something is very wrong in your design (perhaps add more tubes?). Conversely, if you get a length of 5 cm, you probably have too many tubes.
Pay attention to the pressure drop through both the shell side and tube side. Part of your analysis will need to be the cost of the electricity for the pumps to pump the fluid through the heat exchanger.
Don't forget to add in some fouling allowances in your overall heat transfer coefficient calculation.

Attachment:- Assignment.pdf

Reference no: EM131205805

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