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

2. Design for Safety of A HXdi do Di

4. Measure of thermal stress:

5. Severity of Thermal Stresses

6. 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.

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

8. Hairpin Heat Exchangers in series

11. Well preferred for heat transfer areas upto 50 m2

12. Ideas for Heat Transfer Betterment

13. e- NTU Curves: Counter flow

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

15. More Innovative Configurations of DTHXs