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Charles Eley, P.E., Eley Consulting |
As zero net-energy becomes our goal, we have a fixed energy target (e.g. zero) that is verified after the building is constructed and operated. The assumptions on operating conditions are no longer neutral as they are with the two-model approach used for code compliance; they are critically important. This presentation introduces the concept of an energy services index (ESI) and recommends that the energy modeling workflow include scenario analysis for a range of energy services that the building could potentially deliver in the future. For future ESI’s that are more demanding, opportunities for additional renewable energy are identified.