The following exercise will use the Autodesk Insight to explore how features of a building’s envelope can affect the predicted energy performance.
This is the benchmark comparison with the operating schedule and roof construction updated:
Building Envelope Case:
The following building envelope changes resulted in a Predicted Mean EUI of less than 54 kBtu/ft2/yr. While there were some choices that could have saved slightly more energy, some changes seemed illogical and unreasonable ( 0% WWR ratios on any wall for example). The following changes take into account Thermal properties, Glazing %, Thermal properties of glazing, and window shading, and the specific change can be seen in the photo and caption:
Power and Lighting Measures
The following changes were implemented in the power and lighting measures category:
By adding the power and lighting measures to the building envelope improvements, the EUI can be reduced significantly.
The following changes to the PV panel surface coverage, panel efficiency, and payback limit were explored:
Overall, the predicted mean EUI can be driven below the ASHRAE, ARCH 2030, and even into the negative values by implementing PVs into the design strategy. The negative value suggests that this building could create more energy than it uses by implementing all these options.