Concurrent Engineering Aspects of HXs P M V Subbarao Professor Mechanical Engineering Department I I T Delhi A Complete Justification of HX Design….

Design for Safety of A HX di do Di

Measure of thermal stress:

Severity of Thermal Stresses

Double Pipe Heat Exchanger A double pipe heat exchanger is one of the simplest form of Heat Exchangers. The wall of the inner pipe is the heat transfer surface. The major use of these HX is sensible cooling or heating applications. But Very long, even for moderate capacities. Unviable to accommodate in an industrial space. To make a Unit Isotropically Compact, the arrangement is made in Multiple Times and Continuous Serial and Parallel flow.

Hairpin Heat Exchanger The inner tube is connected by U – shaped return bend enclosed in a return bend housing

Hairpin Heat Exchangers in series

                                      

Well preferred for heat transfer areas upto 50 m2

Ideas for Heat Transfer Betterment

e- NTU Curves: Counter flow

Ideas for Thermodynamic Betterment U-tube Annular in series & tubular in parallel Annular in parallel & tubular in series

More Innovative Configurations of DTHXs