Saving Quantification for Electrical Energy Management Program Considering Integration of Net Energy Metering Scheme

Abstract

Retrofitting an efficient chillers system is one of the Energy Conservation Measures (ECM) under the Energy Efficiency (EE) program. Meanwhile, installing a PV system for electricity generation could be considered a different approach under Renewable Energy (RE) program. However, it might be challenging to determine the actual electrical energy savings when various factors are other before and after EE & RE program implementation concurrently. Therefore, those conditions will affect the quantification of genuine savings. Due to that reason, the Measurement and Verification (M&V) approach is introduced to validate the actual savings of the retrofit program. Thus, this study proposes an approach considering the routine and non-routine adjustment of the baseline where the regression analysis determination was used to identify the correlation level of the significant variables. Furthermore, by considering the static component in the M&V method, the electricity pricing from Net Energy Metering (NEM) scheme has been adopted congruently as the validation process of the RE solution. Therefore, option B has been used to establish the energy savings of the new chiller retrofit program. In contrast, Option C was applied to quantify the entire energy savings of the building after the NEM scheme had been incorporated. Consequently, the conventional energy saving percentage and the integrated energy performance under the NEM scheme have been determined concurrently. As a result, the solution can compute approximately 10.65% electrical energy saving annually, considered an actual saving declaration for the integrated EE and RE program in a building.