Glossary

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BEM predicts a building’s anticipated energy use and corresponding energy savings, as compared to a standard baseline. In so doing, it demonstrates project compliance with local, regional or national energy codes. BEM predicts energy performance based on Typical Meteorological ...
Building Operation Modeling introduces actual utility bills, use patterns, hours of operation, functioning of systems, and real weather conditions for a completed building into a model structured similarly to the Building Energy Model. It thereby allows the comparison ...
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eGrid is a multiplier that describes the mix of electrical generation types (e.g., coal, natural gas, nuclear, solar, hydro, etc.) that make up national and regional power grids. eGrid accounts for differences in regional electricity generation source capacities, which ...
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Energy Use Intensity is a measurement that describes a building’s annual energy consumption relative to the building’s gross square footage. To date, this term is most often used as an expression of an existing building’s actual, metered energy consumption, or as a comparative ...
Energy Use Intensity Proposed (EUIp) describes the energy use for a project based on modeled source energy. Being source-based, rather than site-based, it includes energy generation and transmission losses and is therefore a better prediction of the total energy footprint ...
Predicted Energy Use Intensity (pEUI) describes the energy use for a project based on modeled site energy. pEUI is a modeled number and, because of the distinctions described earlier between Building Energy Modeling and Building Operation Modeling, very likely will not ...
Project Resource Modeling is the most extensive and broad of the four most common forms of modeling. It assesses multiple resource issues that affect and are affected by the development of a project, including energy, water, material selection, and solid waste. It ...
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Site energy is the measure generally familiar to the design profession. It is the amount of energy consumed by a building and is reflected in utility bills paid by the building owner. Source: An Architect’s Guide to Integrating Energy Modeling in the Design Process. ...
Source energy is a more accurate measure of a building’s energy footprint, because it includes energy that is lost during production, transmission, and delivery to the building. Electricity is the prime example; what is consumed at the building is only a proportion of ...