Air Changes per Hour in ventilated cavity
Posted: Wed Dec 18, 2024 4:16 am -1100
Dear WUFI users
I recently run two identical simulations for a rainscreen ventilated cavity assuming a 50mm air cavity with no additional moisture capacity. The simulations have identical parameters for the build-up, moisture sources etc. except for the air changes sources. In simulation:
1) In simulation 1 I set 50 ACH/h assuming a highly-ventilated cavity
2) In simulation 2 I set 20 ACH/h assuming a slightly-ventilated cavity
The total water content results are very different and simulation 1) provides 127 errors while simulation 2) provides only 20 errors. Simulation 1) should be discarded due to the many errors.
Does someone know why this large discrepancy?
Thank you for your assistance,
Amedeo
I recently run two identical simulations for a rainscreen ventilated cavity assuming a 50mm air cavity with no additional moisture capacity. The simulations have identical parameters for the build-up, moisture sources etc. except for the air changes sources. In simulation:
1) In simulation 1 I set 50 ACH/h assuming a highly-ventilated cavity
2) In simulation 2 I set 20 ACH/h assuming a slightly-ventilated cavity
The total water content results are very different and simulation 1) provides 127 errors while simulation 2) provides only 20 errors. Simulation 1) should be discarded due to the many errors.
Does someone know why this large discrepancy?
Thank you for your assistance,
Amedeo