Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
Similar to actuators, internal variables in EMS are part of a pre-defined list -- you can only access the items that the development team has defined as a potential internal variable. This is why the EDD output file is generated based on the Output:EnergyManagementSystem object to include what actuators and internal variables are available for your IDF.
Most internal variables for HVAC systems are related to sizing or nominal rating conditions. In the case of water heating coils, it looks like there are no internal variables available at all.
An alternative to using EMS to get this information is to review the EIO output file. The EIO file has different section, and the Component Sizing Information is where you can find the maximum water flow rate through a hot water coil. If you're already using the Python Plugin, you may be able to write a script to automate the process of parsing the EIO file for this information to then use somewhere else in your modeling workflow.
| | 2 | No.2 Revision |
Similar to actuators, internal variables in EMS are part of a pre-defined list -- you can only access the items that the development team has defined as a potential internal variable. This is why the EDD output file is generated based on the Output:EnergyManagementSystem object to include what actuators and internal variables are available for your IDF.IDF. You can read more in this post.
Most internal variables for HVAC systems are related to sizing or nominal rating conditions. In the case of water heating coils, it looks like there are no internal variables available at all.
An alternative to using EMS to get this information is to review the EIO output file. The EIO file has different section, and the Component Sizing Information is where you can find the maximum water flow rate through a hot water coil. If you're already using the Python Plugin, you may be able to write a script to automate the process of parsing the EIO file for this information to then use somewhere else in your modeling workflow.
| | 3 | No.3 Revision |
Similar to actuators, internal variables in EMS are part of a pre-defined list -- you can only access the items that the development team has defined as a potential internal variable. This is why the EDD output file is generated based on the Output:EnergyManagementSystem object to include what actuators and internal variables are available for your IDF. You can read more in this post.
Most internal variables for HVAC systems are related to sizing or nominal rating conditions. In the case of water heating coils, it looks like there are no internal variables available at all.
An alternative to using EMS to get this information is to review the EIO output file. The EIO file has different section, sections, and the Component Sizing Information is where you can find the maximum water flow rate through a hot water coil. If you're already using the Python Plugin, you may be able to write a script to automate the process of parsing the EIO file for this information to then use somewhere else in your modeling workflow.
