Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
To modify the source code it is a quite a big issue, why go to make life so complicated ?
Yuo may want to use a Solar Trasmittance value of WindowMaterial:Shade object (as example) properly modified to take into account the system is not fully closed: a drapery with 10% solar trasmittance, closed for a half, you accept it as fully closed but with a solar trasmittance of 5%
| | 2 | No.2 Revision |
To modify the source code it is a quite a big issue, why go to make life so complicated ?
Yuo may want to use a Solar Trasmittance value of WindowMaterial:Shade object (as example) properly modified to take into account the system is not fully closed: a drapery with 10% solar trasmittance, closed for a half, you accept it as fully closed but with a solar trasmittance of 5%
You can even think to make change this value dinamically to take into account various blind position (%Closing). This can happen only on condition that an Actuator is able to access solar transmittance value. You may want to check the EDD file. To get it you need to include a Output:EnergyManagementSystem object in your IDF file and run a simulation
| | 3 | No.3 Revision |
To modify the source code it is a quite a big issue, why go to make life so complicated ?
Yuo may want to use a Solar Trasmittance value of WindowMaterial:Shade object (as example) properly modified to take into account the system is not fully closed: a drapery with 10% solar trasmittance, closed for a half, you accept it as fully closed but with a solar trasmittance of 5%55% = 0.510% (half closed) + 0.5100% (half open)
You can even think to make change this value dinamically to take into account various blind position (%Closing). This can happen only on condition that an Actuator is able to access solar transmittance value. You may want to check the EDD file. To get it you need to include a Output:EnergyManagementSystem object in your IDF file and run a simulation
EDIT ANSWER:
I have fixed the value in the example I had exposed, it was incorrect.
@shorowit no problem for me too!
I toally agree with @willyJohan's proposal: having in mind the N positions your shading device can assume(e.g. 0/4 =fully open, 1/4, 2/4, 3/4, 4/4 =fully closed), you can try dividing your opening into N-1 smaller equally spaced openings , to which going to apply the same shading device. Keep in mind to eventually adjust frame and dividers thickness, and sill depth to account for this trick
| | 4 | No.4 Revision |
To modify the source code it is a quite a big issue, why go to make life so complicated ?
Yuo may want to use a Solar Trasmittance value of WindowMaterial:Shade object (as example) properly modified to take into account the system is not fully closed: a drapery with 10% solar trasmittance, closed for a half, you accept it as fully closed but with a solar trasmittance of 55% = 0.50.5 * 10% (half closed) + 0.50.5 * 100% (half open)
You can even think to make change this value dinamically to take into account various blind position (%Closing). This can happen only on condition that an Actuator is able to access solar transmittance value. You may want to check the EDD file. To get it you need to include a Output:EnergyManagementSystem object in your IDF file and run a simulation
EDIT ANSWER:
I have fixed the value in the example I had exposed, it was incorrect.
@shorowit no problem for me too!
I toally agree with @willyJohan's proposal: having in mind the N positions your shading device can assume(e.g. 0/4 =fully open, 1/4, 2/4, 3/4, 4/4 =fully closed), you can try dividing your opening into N-1 smaller equally spaced openings , to which going to apply the same shading device. Keep in mind to eventually adjust frame and dividers thickness, and sill depth to account for this trick
