Existing-Building Energy Modeling
An energy model is a computer-generated representation of a building used to estimate the impact of proposed changes to the building on energy use. It is a comparative tool most commonly used:
• To evaluate the impact of different design options (e.g., a chilled-beam system as opposed to a conventional overhead single-duct variable-air-volume system).
• To compare the performance of a proposed design to local energy-code requirements.
• To determine the impact of change orders (e.g., less exterior-wall insulation) during construction.
• To understand how a building is consuming energy.
• To quantify deficiencies in HVAC controls (e.g., how much energy and money non-functioning air-handling-unit [AHU] supply-air-temperature reset is wasting).
• To identify/estimate savings from facility improvements.
• As part of a measurement-and-verification (M&V) program.