Appendix G Performance

This recipe generates a baseline Honeybee Model from the input Model, which is consistent with ASHRAE 90.1 Appendix G 2016 (and later), This includes adjusting the geometry, constructions, lighting, HVAC, SHW, and removing any clearly-defined energy conservation measures like daylight controls.

Note that all schedules are essentially unchanged in the baseline model, meaning that additional post-processing of setpoints may be necessary to account for energy conservation strategies like expanded comfort ranges, ceiling fans, and personal thermal comfort devices. It may also be necessary to adjust hot water loads loads in cases where low-flow fixtures are implemented.

After the creation of the baseline model, this recipe will simulate it in EnergyPlus, performing 4 separate simulations in parallel for each of the 4 cardinal directions per the Appendix G specification. Alongside these baseline simulations, the input Model will be simulated to get the energy performance of the proposed building. At the end, all energy use results will be post-processed along with the energy costs inputs to estimate the Appendix G PCI. An additional computation will also be run to estimate the number of LEED "Optimize Energy Performance" points for LEED v4.

The recipe outputs a file called appendix_g_summary.json, which contains the PCI improvement for the latest versions of ASHRAE 90.1 in the format below:

{
    "proposed_eui": 112.866,
    "proposed_energy": 3517144.444,
    "proposed_cost": 703428.89,
    "baseline_eui": 235.3,
    "baseline_energy": 7332474.306,
    "baseline_cost": 1214797.19,
    "pci_t_2016": 0.666,
    "pci_t_2019": 0.591,
    "pci_t_2022": 0.574,
    "pci": 0.579,
    "pci_improvement_2016": 13.055,
    "pci_improvement_2019": 2.0219,
    "pci_improvement_2022": -0.880
}

The recipe also outputs a file called leed_summary.json, which contains the ASHRAE 90.1-2016 PCI for both cost and carbon (GHG) emissions in the format below:

{
  "proposed_eui": 112.866,
  "proposed_cost": 703428.89,
  "proposed_carbon": 464263.067,
  "baseline_eui": 235.3,
  "baseline_cost": 1214797.19,
  "baseline_carbon": 1577657.766,
  "pci": 0.579,
  "pci_target": 0.666,
  "pci_improvement": 13.055,
  "carbon": 0.294,
  "carbon_target": 0.633,
  "carbon_improvement": 53.511,
  "leed_points": 9
}