energy-audit

Energy Audit — Baseline vs. Proposed Comparison

Compare models: $ARGUMENTS

Steps

1. Load baseline — Use load_model to open the baseline (existing conditions) model. Read the idfkit://model/summary resource to document its configuration.

2. Document baseline — Record key properties:

   • Envelope: wall/roof/window U-values and SHGC (inspect Construction and Material objects)
   • HVAC: system types and efficiencies
   • Lighting: power densities per zone
   • Schedules: occupancy and operating hours
   • Weather file and location

3. Simulate baseline — Run run_simulation and read the idfkit://simulation/results resource. Use analyze_peak_loads for peak decomposition. Record:

   • Annual energy by end-use (heating, cooling, lighting, equipment, fans, pumps)
   • Peak heating and cooling loads with component breakdown
   • Unmet hours

4. Load proposed — Clear session with clear_session, then load_model the proposed model. Read the idfkit://model/summary resource.

5. Document changes — Compare key differences from baseline:

   • What was changed (insulation, windows, HVAC equipment, controls, etc.)
   • Quantify the parameter changes

6. Simulate proposed — Run run_simulation and read the idfkit://simulation/results resource. Use analyze_peak_loads.

7. Compare and report:

   • Energy savings: kWh and % reduction by end-use category
   • Peak load reduction: kW reduction in heating/cooling peaks
   • Unmet hours: Ensure comfort is maintained
   • Cost implications: If utility rates are known, estimate annual savings
   • Simple payback: If measure costs are provided

Present results in a clear comparison table format.