The optimum thermal design of a shell and tube heat exchanger involves the consideration of many interacting design parameters which can be summarized as follows: Process: 1. Process fluid assignments to shell side or tube side. Selection of stream temperature specifications. Setting shell side and tube side pressure drop design limits. Fundamental Concepts of Overall Heat Transfer Coefficient (OHTC) In shell and tube type heat exchanges overall heat transfer coefficient (OHTC ) is product of the three factors mainly. They are Tube inside liquid media film coefficient, Shell side heating media film coefficient and metal wall resistance. Heat transfer is the science which deals with the rates of exchanges of heat between hot.
Tubular Heat Exchanger Inspection, Maintenance, and Repair
Maurice Stewart, Oran T. Lewis, in Heat Exchanger Equipment Field Manual, 2013
Channels
Shell and tube exchangers have several different configurations with different types of heads and shells; these parts are inspected and repaired in similar ways
Figure 3.114 is a large four-pass channel in very good condition
The pass partitions are near full thickness with no mechanical or corrosion damage present, gasket surfaces are also in good condition, and bolt holes for the body flange are round as opposed to showing out of roundness damage
There are several design reasons for using multiple passes in shell and tube exchangers
One reason to increase fluid velocity in the tubes is to reduce fouling deposits