Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
Economizer controls should be optimized to provide maximum free cooling while minimizing the need for heating. Changing the economizer control type will essentially change the way the economizer operates and therefore provide different amounts of outdoor air during the simulation. To see how economizer controls affect heating energy use add report variables and plot them after a simulation. For this test, plot OA volume (or mass) versus heating coil heating energy and compare across the different economizer controls. Replace the asterisk in the reports below with the node name of the OA node in the OA mixer and the name of the heating coil to get just the data needed. See the rdd file to be sure of the actual reports available for each simulation. After running the simulation the rdd file will contain all available report variables for a specific simulation.
```` Output:Variable,,System Node Standard Density Volume Flow Rate,hourly; !- HVAC Average [m3/s] Output:Variable,,System Node Mass Flow Rate,hourly; !- HVAC Average [kg/s]
Output:Variable,*,Heating Coil Heating Energy,hourly; !- HVAC Sum [J] ````
| | 2 | No.2 Revision |
Economizer controls should be optimized to provide maximum free cooling while minimizing the need for heating. Changing the economizer control type will essentially change the way the economizer operates and therefore provide different amounts of outdoor air during the simulation. To see how economizer controls affect heating energy use add report variables and plot them after a simulation. For this test, plot OA volume (or mass) versus heating coil heating energy and compare across the different economizer controls. Replace the asterisk in the reports below with the node name of the OA node in the OA mixer and the name of the heating coil to get just the data needed. See the rdd file to be sure of the actual reports available for each simulation. After running the simulation the rdd file will contain all available report variables for a specific simulation.
```` Output:Variable,,System
Output:Variable,*,System | | 3 | No.3 Revision |
Economizer controls should be optimized to provide maximum free cooling while minimizing the need for heating. Changing the economizer control type will essentially change the way the economizer operates and therefore provide different amounts of outdoor air during the simulation. To see how economizer controls affect heating energy use add report variables and plot them after a simulation. For this test, plot OA volume (or mass) versus heating coil heating energy and compare across the different economizer controls. Replace the asterisk in the reports below with the node name of the OA node in the OA mixer and the name of the heating coil to get just the data needed. See the rdd file to be sure of the actual reports available for each simulation. After running the simulation the rdd file will contain all available report variables for a specific simulation.
Output:Variable,*,System Node Standard Density Volume Flow Rate,hourly; !- HVAC Average !-HVAC Avg [m3/s]
Output:Variable,*,System Node Mass Flow Rate,hourly; !- HVAC Average [kg/s]
Output:Variable,*,Heating Coil Heating Energy,hourly; !- HVAC Sum [J]
