[EnergyPlus_Support] question about Infiltration Sensible Heat Loss

["taozus" <taozo@xxxxxxxxx>]

Hi everybody,
I made a simulation for a building with heavy walls in italian
climate, and I got 75731 MJ for Infiltration Sensible Heat Loss.
Then I re-made the simulation using the very same conditions, except
for the weight of the walls (I defined some heavy materials such
bricks using the MATERIAL:REGULAR-R, keeping the same thermal
resistance and the same absorptances).
I got a Infiltration Sensible Heat Loss of 79648 MJ, which is greater
than the previous one.
I'm confused: I thought that the infiltration losses would just be the
same. Aren't they the result of (internal Temp - external Temp) * air
heat capacity * Design Volume Flow Rate * time ?
Actually it doesn't seem so, since the infiltration heat loss changes
if I change the walls features...

Can anybody explain me how the Infiltration Sensible Heat Loss is
actually calculated?
the output-input reference is not very clear about that: it just says:

> Zone Infiltration Sensible Heat Loss [J]
> The sensible (temperature) heat loss that occurs when the
infiltration air temperature (outdoor) < zone air temperature.

thanx a lot.
Matteo.



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