Energy Savings for a Manufacturing Facility Using Building Simulation Modeling: A Case Study

:Efforts to improve energy efficiency are an increasing concern for many facility engineering managers. Building energy simulation software can provide a useful tool to assess facility energy consumption and to develop cost effective energy efficiency improvements. In this case study, two energy simulation software packages were linked to create an improved approach to modeling a manufacturing plant. Both energy simulation programs were observed to be adequate in modeling the facility energy consumption; however, this study also revealed limitations in both programs' ability to accurately model industrial facilities. To illustrate the combined energy models, a case study was conducted with five alternatives. The alternatives were evaluated using payback and after-tax analysis (ATA) figures of merit. The analysis illustrated the problem of using payback to choose among competing alternatives. The engineering manager is provided with a robust template for energy analysis as an economic decision making model.