# Difference between facet average and area-weighted average

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 September 17, 2009, 11:49 Difference between facet average and area-weighted average #1 New Member   Dezhi Zheng Join Date: Sep 2009 Posts: 8 Rep Power: 10 Hi, guys, I have a project need to show wall temperature on wall. The area -weighted average give 500K, however, facet average give the temperature over 1000K. Could you help me to explain the difference between each other. Which one should I use?

September 18, 2009, 07:36
#2
New Member

Wiebe Zoon
Join Date: Mar 2009
Posts: 10
Rep Power: 10
Quote:
 Originally Posted by zdz198728 Hi, guys, I have a project need to show wall temperature on wall. The area -weighted average give 500K, however, facet average give the temperature over 1000K. Could you help me to explain the difference between each other. Which one should I use?
Hi,

This depends on what you want. The 'facet average' just sums up the temperatures of all facets on your wall and divides by the number of facets, regardless of the size of these facets. the area weighted average multiplies the temperature of each facet by its area, sums everything up, and divides by the area of the wall.

In your case you probably have a hot spot on your wall with small facets, hence the difference.

Kind regards,
Wiebe.

 September 18, 2009, 13:22 #3 New Member   Dezhi Zheng Join Date: Sep 2009 Posts: 8 Rep Power: 10 Thank you very much! I think your answer helps.

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