Contact Resistance/Conductance Tables 1

[prsww3]

I'm creating a satellite thermal model and have run into a little problem. It's become necessary to enter some thermal resistance/conductance values into the model but I can't seem to find agreement on how to get these values.

I've heard conflicting opinions on whether to calculate this data or find it in a reference book. However, after scanning through the CRC Materials Handbook, a table of these values is nowhere to be found.

Has anyone else encountered this problem? Should I calculate or look up this data? If I need to look it up can you give me a reference?

Thanks!

 

[DHambley]

The surface roughness between the materials, the contact pressure and whether there is a thermal interface material (pad or grease) are the parameters involved. Out of curiosity after reading your post, I found this article by Jovanovich et al. A google search showed some more in-depth guides to these calculations by him and others.
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http://www.thermalengineer.com/library/calculating_interface_resistance.htm>

 

[IRstuff]

The above cited link appears to be corrupted:

http://www.thermalengineer.com/library/calculating_interface_resistance.htm

works

Seems to be lots of hits on websearch:

http://help.solidworks.com/2011/eng...hermalAnalysis/Thermal_Contact_Resistance.htm

http://www.mhtlab.uwaterloo.ca/pdf_papers/mhtl07-6.pdf

http://www.engr.sjsu.edu/~nikos/courses/ME297/pdf/Grujicic.pdf

http://www.lytron.com/Tools-and-Tec...ion-Notes/Reducing-Contact-Thermal-Resistance

http://www.clear.rice.edu/mech403/HelpFiles/FEA_thermal_concepts.pdf

http://nativedynamics.com.au/kb/heat_transfer/thermal-contact-resistance/

http://www.ufrgs.br/ldtm/publicacoes/inaccuracy_of_the_termal.pdf

http://www.psfc.mit.edu/~sscott/MSEmemos/mse_memo_93c.pdf

TTFN
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[oreillsi]

I recently had similar difficulties in calculating thermal contact resistance values, it's a tricky problem and it seems like the most reliable way of determining values is from testing, especially when interstitial materials are used between two (or more) surfaces. However there is some useful info on the subject to be found in the ECSS Thermal Design handbook, doc number ECSS-E-HB-31-01-Part 4A is what you're looking for, a .doc of it can be downloaded through this google link to the ECSS website (the actual URL seems to not work when copied but this one should work):

https://www.google.ie/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0CCwQFjAA&url=http://

http://www.ecss.nl/forums/ecss/disp...o1cjLL9-1LbODCBOg&sig2=zkoFuqREzzPAaLcN3pxVzg

Section 5 is particularly useful in the document, on pages 44 and 47 there are correlations which can be used to determine values and there's plenty of plots with experimental results in the document to use also.

This answer may be too late to help you with your problem prsww3 but might prove useful to other people trying to calculate thermal contact conductance values.

 

[IRstuff]

The entirety of the design handbook can be downloaded here:

http://www.ecss.nl/forums/ecss/_tem...s/dispatch.cgi/publications/modDoc/doc/100198

TTFN
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