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- 1. CFD ANALYSIS OF CROSS FLOW AIR TO AIR TUBE TYPE HEAT EXCHANGER Vikas Kumar 1* , D. Gangacharyulu 2* , Parlapalli MS Rao 3 and R. S. Barve 4 1 Centre for Development of Advanced Computing, Pune University Campus, Pune, India 2 Thapar Institute of Engineering & Technology, Patiala, India 3 Nanyang Technological University, Singapore 4 Crompton Greaves Ltd, Kanjur Marg, Mumbai, India
- 3. Large Electrical Motor Heat exchanger Source: M/S Crompton Greaves Ltd. Mumbai, India
- 4. Heat Exchanger Geometry External cold air Internal hot air External hot air cooled air cooled air
- 7. Table 1: Geometrical details of the heat exchanger 61 mm Transverse pitch 6. 41 mm Longitudinal pitch 7. 27 - No. of tubes 5. 1610 mm Tube length 4. 26 mm Tube outer diameter 3. 22 mm Tube inner diameter 2. 1760 x 100 x 765 mm Overall dimension 1. Value/Type Unit Description Sl. No.
- 9. The distribution of cells in the three directions are given below: X Direction : 55 Y Direction : 48 Z Direction : 232 The total number of cells in the computational domain is 612,480. Grid generation for heat exchanger
- 10. Fig. 3: Side view of the grid
- 11. Table 2: Operating boundary conditions of the heat exchanger 228.80 (6.48) cfm (cu.m/m) Volumetric flow rate of hot air 4. 388 (10.98) cfm (cu.m/m) Volumetric flow rate of cold air 3. 63 o C Temperature of hot air 2. 35 o C Temperature of cold air 1. Value Unit Input parameters Sl. No.
- 13. Fig. 4: Pressure distribution in the heat exchanger
- 14. Fig. 5: Velocity distribution in the heat exchanger
- 15. Fig. 6: Temperature distribution in the heat exchanger
- 16. Fig. 7: Temperature distribution in the tube bundle of the heat exchanger
- 17. Table 3: Comparison of air temperature prediction at various outlets 44.32 43.68 46.8 Cold air 50.9 49.55 51.8 Hot air 4 th section 65 63 63 Hot air 3rd section 61 63 63 Hot air 2 nd section Hot air 1 st section PHOENICS Simulation 43.68 34.4 3. PHOENICS Simulation 44.70 34.4 2. Experimental 41.9 34.4 1. Cold air Remarks Outlet temperature, o C Inlet temperature, o C Sl. No.
- 18. Fig. 8: A comparison between the results of CFD simulation & experiments
- 19. Fig. 9: Temperature distribution in the heat exchanger – a case study
- 20. Fig. 10: Temperature distribution of the heat exchanger (after modification of central partition plate)
- 21. (Sun Ultra SPARC-450, 300 MHz) Fig. 11: Effect of number of processors in computing time using parallel PHOENICS
- 24. THANK YOU