Advanced customization and calibration of the Baseline Energy model is now possible via the drawing.tool. Each Room within the drawing.tool model can be assigned a template which will control the lighting power density (LPD), Appliance use (EPD) and occupant density. These values will be area-weighted averaged to populate calibrated, detailed values in the Baseline Energy Model. Assigning specific templates to rooms allows for further detail beyond what is captured with multi-use projects.
Additionally, if the envelope performance values (Roof R-value, Wall R-value, etc.) are customized inside the drawing.tool, then the baseline page will be automated with the area-weighted values. Here's a helpful summary that can be seen upon visiting the baseline page after exporting the model from the drawing.tool:
To utilize this new method of defining the Baseline Energy model inputs start with a single use project. Next, either import or draw your building directly in drawing.tool.
Each room will have a default template applied which can be changed based on the use type intended. When exporting from drawing.tool to analysis the values defined by the templates will be area-weighted averaged to the specific Baseline inputs. Here is an example of what is happening:
The values assigned by each of the Templates are listed in the tables below:
Some Important Notes:
The LPD values are referenced from ASHRAE 90.1 2013 space-by-space tables.
The EPD and occupant density values are referenced from ANSI/ASHRAE/IES 90.1 User's Manual.
The templates are connected directly to loadmodeling.tool! So for projects preforming system sizing via the tool there is no need to duplicate the work of assigning templates!
The area weight average method for building inputs can also be done by hand if preferred for a simple project, more information on the calculations are located here