In co current flow heat exchangers, the streams flow parallel to each other and in the same direction This is less efficient than counter current flow but does provide more uniform wall temperatures.
Process
1. Process fluid assignments to shell side or tube side.
2. Selection of stream temperature specifications.
3. Setting shell side and tube side pressure drop design limits.
4. Setting shell side and tube side velocity limits.
5. Selection of heat transfer models and fouling coefficients for shell side and tube side.
Mechanical
1. Selection of heat exchanger TEMA layout and number of passes.
2. Specification of tube parameters – size, layout, pitch and material.
3. Setting upper and lower design limits on tube length.
4. Specification of shell side parameters – materials, baffle cut, baffle spacing and clearances. 5. Setting upper and lower design limits on shell diameter, baffle cut and baffle spacing.