REALITY IMPACTS ENERGY USE : FROM DREAM TIME TO REAL TIME FOR SIMBUILD 2012 CONFERENCE The Weidt Group , Minnetonka , MN
Jason Steinbock, Jim Douglas, Julia Gauthier, Chris Iacono, Adam Niederloh, David Eijadi
This paper examines how the operational performance of ten buildings in Iowa compares to design projections after at least one year of operation. The design models were created as part of the Alliant Energy Commercial New Construction program and were used to help building owners and design teams understand the potential energy savings of a wide range of technologies. Utility bills, owner surveys, and field observations were used to update the models to understand the actual energy use in these buildings and the savings realized from the energy efficiency investments. This study describes the value of updating model projections for these ten buildings by connecting operational changes with actual building energy use through the use of energy models. The report discusses the importance of adjusting the baseline used in the comparative analysis evaluation of energy conservation measures. Operational parameters are a key component of building energy use but not governed by energy codes and often change from assumptions made during building design, construction and even the early operation period.
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