|
Dear Trnsys-users,
I am simulating a test cell that is humidified and
dehumidified for 12hrs each at a rate of 33.33g/hour.
No moisture buffering occurs and infiltration is
set to 0.007hr-1. The temperature in the cell is kept constant
to 20°C. Humidifying the cell is introduced as a
zone gain, dehumidification is introduced
by ventilating the
zone with ventilation air at 20°C and at relative
humidity calculated from the desired vapour pressure difference
(33.33g/hr is equal to a pressure difference of
118.75Pa). From this simulations, we expect to get a constantly
varying indoor relative humidity.
When looking at the moisture balance of the zone,
it is seen that when dehumidification occurs the balance
is not equal to zero (as it should be). The sum of
the infiltration and ventilation terms do not equal to the change of water
stored in the zone air. Because of
this the model simulates a larger dehumidification than
humidification.
Can anyone help me with this? (Does this occurs
because of an iteration problem maybe ?)
In attachement you will find the moisture balance,
together with the TPF and BLD file of the model.
Thanks in advance for looking at it !
Kind regards,
Marijke Steeman
PhD-student Architecture and Urban Planning Ghent University +32(0)92643752 |
Attachment:
moisture balance.xls
Description: MS-Excel spreadsheet
Attachment:
emptycell.bui
Description: Binary data
Attachment:
test cell.TPF
Description: Binary data