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Hello,all! I have a question about the simulation of open skylight. I looked it up in the I/O Reference, it is written like this: The AirflowNetwork model does not have a model for bi-directional flow through large horizontal openings in exterior surfaces. For this reason, AirflowNetwork:MultiZone:Component:Detailed-Opening should not be used for exterior horizontal openings. The best modeling technique in this case is to put an AirflowNetwork:MultiZone:Surface:Crack object in a horizontal surface and use a large air mass flow coefficient. Crack flow is assumed to be uni-directional in any given timestep (but can reverse flow direction from timestep to timestep). What I want to know is the range of the air mass flow coefficient, and how much should I set this value to indicate that the skylight is open. Or where can I find the relevant reference? Thanks a lot!

Hello,all! I have a question about the simulation of open skylight. I looked it up in the I/O Reference, it is written like this: The AirflowNetwork model does not have a model for bi-directional flow through large horizontal openings in exterior surfaces. For this reason, AirflowNetwork:MultiZone:Component:Detailed-Opening should not be used for exterior horizontal openings. The best modeling technique in this case is to put an AirflowNetwork:MultiZone:Surface:Crack object in a horizontal surface and use a large air mass flow coefficient. Crack flow is assumed to be uni-directional in any given timestep (but can reverse flow direction from timestep to timestep). What I want to know is the range of the air mass flow coefficient, and how much should I set this value to indicate that the skylight is open. Or where can I find the relevant reference? Thanks a lot!

Hello,all! I have a question about the simulation of open skylight. I looked it up in the I/O Reference, it is written like this: The AirflowNetwork model does not have a model for bi-directional flow through large horizontal openings in exterior surfaces. For this reason, AirflowNetwork:MultiZone:Component:Detailed-Opening should not be used for exterior horizontal openings. The best modeling technique in this case is to put an AirflowNetwork:MultiZone:Surface:Crack object in a horizontal surface and use a large air mass flow coefficient. Crack flow is assumed to be uni-directional in any given timestep (but can reverse flow direction from timestep to timestep). What I want to know is the range of the air mass flow coefficient, and how much should I set this value to indicate that the skylight is open. Or where can I find the relevant reference? Thanks a lot!

Hello,all! I have a question about the simulation of open skylight. I looked it up in the I/O Reference, it is written like this: The AirflowNetwork model does not have a model for bi-directional flow through large horizontal openings in exterior surfaces. For this reason, AirflowNetwork:MultiZone:Component:Detailed-Opening should not be used for exterior horizontal openings. The best modeling technique in this case is to put an AirflowNetwork:MultiZone:Surface:Crack object in a horizontal surface and use a large air mass flow coefficient. Crack flow is assumed to be uni-directional in any given timestep (but can reverse flow direction from timestep to timestep). What I want to know is the range of the air mass flow coefficient, and how much should I set this value to indicate that the skylight is open. Or where can I find the relevant reference? Thanks a lot!

Hello,all! I have a question about the simulation of open skylight. I looked it up in the I/O Reference, it is written like this: The AirflowNetwork model does not have a model for bi-directional flow through large horizontal openings in exterior surfaces. For this reason, AirflowNetwork:MultiZone:Component:Detailed-Opening should not be used for exterior horizontal openings. The best modeling technique in this case is to put an AirflowNetwork:MultiZone:Surface:Crack object in a horizontal surface and use a large air mass flow coefficient. Crack flow is assumed to be uni-directional in any given timestep (but can reverse flow direction from timestep to timestep). What I want to know is the range of the air mass flow coefficient, and how much should I set this value to indicate that the skylight is open. Or where can I find the relevant reference? Thanks a lot!

Hello,all! I have a question about the simulation of open skylight. I looked it up in the I/O Reference, it is written like this: this:

The AirflowNetwork model does not have a model for bi-directional flow through large horizontal openings in exterior surfaces. For this reason, AirflowNetwork:MultiZone:Component:Detailed-Opening should not be used for exterior horizontal openings. The best modeling technique in this case is to put an AirflowNetwork:MultiZone:Surface:Crack object in a horizontal surface and use a large air mass flow coefficient. Crack flow is assumed to be uni-directional in any given timestep (but can reverse flow direction from timestep to timestep).

What I want to know is the range of the air mass flow coefficient, and how much should I set this value to indicate that the skylight is open. Or where can I find the relevant reference? Thanks a lot!