Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
I believe that the reason for the result you are showing is the value you assigned to Outdoor Air Method. When you leave it to default none you provide no outdoor air at all. So if you didn't set any infiltration, your zone is just cycling it own air reducing the humidity as much as possible. Here it's what written in the Input Output reference about Outdoor Air Method ;
Field: Outdoor Air Method The input must be either None, Flow/Zone, Flow/Person, Flow/Area, Sum, Maximum or DetailedSpecification. None means there is no outdoor air provided by this system. Flow/Zone means that the program will use the input of the field Outdoor Air Flow as the zone design outdoor air flow rate. Flow/Person means the program will use the input from the field Outdoor Air Flow per Person and the maximum occupancy to calculate a zone design outdoor air flow rate. Flow/Area means the program will use the input from the field Outdoor Air Flow per Zone Floor Area to calculated a zone design outdoor air flow rate. Sum means that the flows calculated from the fields Outdoor Air Flow per Person, Outdoor Air Flow per Area and Outdoor Air Flow per Zone will be added to obtain the zone design outdoor air flow rate. Maximum means that the maximum flow derived from Outdoor Air Flow per Person, Outdoor Air Flow per Area and Outdoor Air Flow per Zone will be used for the zone design outdoor air flow rate. The default is None.. You can do your test in OS by using that measure.
| | 2 | No.2 Revision |
I believe that the reason for the result you are showing is the value you assigned to Outdoor Air Method. When you leave it to default none you provide no outdoor air at all. So if you didn't set any infiltration, your zone is just cycling it its own air reducing the humidity as much as possible. Here it's what written in the Input Output reference about Outdoor Air Method ;
Field: Outdoor Air Method The input must be either None, Flow/Zone, Flow/Person, Flow/Area, Sum, Maximum or DetailedSpecification. None means there is no outdoor air provided by this system. Flow/Zone means that the program will use the input of the field Outdoor Air Flow as the zone design outdoor air flow rate. Flow/Person means the program will use the input from the field Outdoor Air Flow per Person and the maximum occupancy to calculate a zone design outdoor air flow rate. Flow/Area means the program will use the input from the field Outdoor Air Flow per Zone Floor Area to calculated a zone design outdoor air flow rate. Sum means that the flows calculated from the fields Outdoor Air Flow per Person, Outdoor Air Flow per Area and Outdoor Air Flow per Zone will be added to obtain the zone design outdoor air flow rate. Maximum means that the maximum flow derived from Outdoor Air Flow per Person, Outdoor Air Flow per Area and Outdoor Air Flow per Zone will be used for the zone design outdoor air flow rate. The default is None.. You can do your test in OS by using that measure.
| | 3 | No.3 Revision |
I believe that the reason for the result you are showing is the value you assigned to Outdoor Air Method. When you leave it to default none you provide no outdoor air at all. So if you didn't set any infiltration, your zone is just cycling its own air reducing the humidity as much as possible. Here it's what written in the Input Output reference about Outdoor Air Method ;
Field: Outdoor Air Method The input must be either None, Flow/Zone, Flow/Person, Flow/Area, Sum, Maximum or DetailedSpecification. None means there is no outdoor air provided by this system. Flow/Zone means that the program will use the input of the field Outdoor Air Flow as the zone design outdoor air flow rate. Flow/Person means the program will use the input from the field Outdoor Air Flow per Person and the maximum occupancy to calculate a zone design outdoor air flow rate. Flow/Area means the program will use the input from the field Outdoor Air Flow per Zone Floor Area to calculated a zone design outdoor air flow rate. Sum means that the flows calculated from the fields Outdoor Air Flow per Person, Outdoor Air Flow per Area and Outdoor Air Flow per Zone will be added to obtain the zone design outdoor air flow rate. Maximum means that the maximum flow derived from Outdoor Air Flow per Person, Outdoor Air Flow per Area and Outdoor Air Flow per Zone will be used for the zone design outdoor air flow rate. The default is
None..None..
You can do your test in OS by using that measure.
| | 4 | No.4 Revision |
I believe that the reason for the result you are showing is the value you assigned to Outdoor Air Method. When you leave it to default none you provide no outdoor air at all. So if you didn't set any infiltration, your zone is just cycling its own air reducing the humidity as much as possible. air. Here it's what written in the Input Output reference about Outdoor Air Method ;
Field: Outdoor Air Method The input must be either None, Flow/Zone, Flow/Person, Flow/Area, Sum, Maximum or DetailedSpecification. None means there is no outdoor air provided by this system. Flow/Zone means that the program will use the input of the field Outdoor Air Flow as the zone design outdoor air flow rate. Flow/Person means the program will use the input from the field Outdoor Air Flow per Person and the maximum occupancy to calculate a zone design outdoor air flow rate. Flow/Area means the program will use the input from the field Outdoor Air Flow per Zone Floor Area to calculated a zone design outdoor air flow rate. Sum means that the flows calculated from the fields Outdoor Air Flow per Person, Outdoor Air Flow per Area and Outdoor Air Flow per Zone will be added to obtain the zone design outdoor air flow rate. Maximum means that the maximum flow derived from Outdoor Air Flow per Person, Outdoor Air Flow per Area and Outdoor Air Flow per Zone will be used for the zone design outdoor air flow rate. The default is None..
You can do your test in OS by using that measure.
