Energy Consumption Analysis with a Weighted Energy Index for a Hotel Building

Abstract

Energy consumption is always an essential and vital issue for commercial hotel buildings. To achieve the goal of energy-saving, regulations and codes are commonly used to regulate the energy usage of the buildings. However, the energy index to evaluate the energy performance did not include the hybrid usage of hotel buildings for different service purpose. In this study, case study for a hotel building with hybrid usage has been investigated comprehensively. Through the field measurement along with testing adjusting and balancing (TAB) project and building energy management system (BEMS) analysis, regression data could be obtained extensively with different areas such as public areas and guest room areas. Energy usage intensity (EUI) with weighting could be derived accordingly through energy modeling code (EnergyPlus). By validating with BEMS data, the key parameters for energy consumption will be identified through the sensitivity analysis. Results reveal that the energy consumption from energy modeling presents good agreement with BEMS at acceptable error of 10%. The ambient temperature and occupancy rate play a very important role on energy consumption which resulted in weighted EUI for public area and guest rooms with R-square of 0.8314 and 0.9184 respectively.