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5/28/2012. Confidential Property of PFTINC. 2. Table of Contents. 1. Statement of Work2. Summary of Results3. Geometry4. Materials5. Elements6. Constraints7. Loads8. Results9. Conclusions
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1. 5/29/2012 Confidential Property of PFTINC 1 Finite Element Analysisof Heat Sink ProFab Technology, INC
August 17, 2005
2. 5/29/2012 Confidential Property of PFTINC 2 Table of Contents 1. Statement of Work
2. Summary of Results
3. Geometry
4. Materials
5. Elements
6. Constraints
7. Loads
8. Results
9. Conclusions & Recommendations
10. Appendix A: Convection Coefficient Calculations
3. 5/29/2012 Confidential Property of PFTINC 3 1. Statement of Work Thermal analysis of Profab Technology's HEAT SINK, part number 1001-100591
Determine the thermal resistance of the heat sink
Examine 4 load cases:
5 Watts
10 Watts
15 Watts
20 Watts
4. 5/29/2012 Confidential Property of PFTINC 4 2. Summary of Results
5. 5/29/2012 Confidential Property of PFTINC 5 3. Geometry Pro/ENGINEER model, 1001-100591.prt
6. 5/29/2012 Confidential Property of PFTINC 6 3. Geometry The units for the original Pro/ENGINEER model were:
Pro/E default
inch lbm s
The model was converted to Metric for the thermal analysis:
mmNs
millimetres Newtons seconds
All relations were commented out to prevent regeneration problems associated with units change
7. 5/29/2012 Confidential Property of PFTINC 7 4. Materials The heat sink is Oxygen-free electronic Copper, UNS C10100
Material properties provided using MatWeb
8. 5/29/2012 Confidential Property of PFTINC 8 5. Elements The Pro/MECHANICA model contains 7,000 tetrahedral solid elements
9. 5/29/2012 Confidential Property of PFTINC 9 6. Constraints Convection constraint applied to vertical surfaces of pin fins
10. 5/29/2012 Confidential Property of PFTINC 10 7. Loads A surface region was created 33.5 mm x 33.5 mm on the bottom surface of the heat sink for the heat load
11. 5/29/2012 Confidential Property of PFTINC 11 7. Loads Heat loads were applied to the surface region on the bottom surface of the heat sink
12. 5/29/2012 Confidential Property of PFTINC 12 8. Results Temperature for 5 W load case
13. 5/29/2012 Confidential Property of PFTINC 13 8. Results Temperature for 5 W load case
Capping plane shown for clarity
14. 5/29/2012 Confidential Property of PFTINC 14 8. Results Temperature for 10 W load case
15. 5/29/2012 Confidential Property of PFTINC 15 8. Results Temperature for 10 W load case
Capping plane shown for clarity
16. 5/29/2012 Confidential Property of PFTINC 16 8. Results Temperature for 15 W load case
17. 5/29/2012 Confidential Property of PFTINC 17 8. Results Temperature for 15 W load case
Capping plane shown for clarity
18. 5/29/2012 Confidential Property of PFTINC 18 8. Results Temperature for 20 W load case
19. 5/29/2012 Confidential Property of PFTINC 19 8. Results Temperature for 20 W load case
Capping plane shown for clarity
20. 5/29/2012 Confidential Property of PFTINC 20 8. Results Thermal resistance equation
21. 5/29/2012 Confidential Property of PFTINC 21 8. Results Thermal resistance results
22. 5/29/2012 Confidential Property of PFTINC 22 8. Results Thermal resistance results
23. 5/29/2012 Confidential Property of PFTINC 23 9. Conclusions As the heat load increases, the thermal resistance decreases
24. 5/29/2012 Confidential Property of PFTINC 24 10. Appendix A: Convection Coefficient Calculations References:
Cooling Zone
http://www.coolingzone.com/Guest/News/NL_SEP_2003/Tony/Tony_Sep_03.html
Thermaflo
http://www.thermaflo.com/bin/bgadatasht.pl?Pnum=b434316b10000
25. 5/29/2012 Confidential Property of PFTINC 25 10. Appendix A: Convection Coefficient Calculations Thermal resistance equation from reference 1
26. 5/29/2012 Confidential Property of PFTINC 26 10. Appendix A: Convection Coefficient Calculations Convection coefficient calculations from reference 2