Diffrent airchange in airgap doesnt effect air temperature

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Peter Brander
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Location: Malmö Sweden

Diffrent airchange in airgap doesnt effect air temperature

Post by Peter Brander » Fri Aug 14, 2009 12:40 am -1100

I´m using sources and sinks to simulate different rates of airchange in a ventilated airgap inside an exterial wall. 5,10,25,50 and 100 changes per hour is used. When i calculate I see that the temperature profiles inside the airgap is identical regardless of ventilation rate. I expected the temperature difference between outside air and airgap air to be very ventilation dependent.

What have I missed?
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Manfred Kehrer
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Post by Manfred Kehrer » Tue Aug 18, 2009 7:49 pm -1100

Dear Peter,

there need not to be a fault. If the air change rate is high enough, the exterior climate conditions will be reproduced in the ventilated cavity. Look at the "Senaste Bräkning" where you can find the integral of all Heat and Moisture Sources.
Manfred
Wiss, Janney, Elstner Associates, Inc.
Official WUFI® Collaboration Partner for USA/Canada
Enjoy WUFI® :) .... It is easy and complex.

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