ABSTRACT
This article discusses feasibility of achieving net-zero energy goals in retrofitting existing commercial buildings in different climate types. The objective of the research was to study how to integrate passive design strategies and energy-efficient building systems to improve building performance and reduce energy consumption of existing buildings, and to reach net zero energy goals by utilizing renewable energy sources. Based on extensive energy modeling and simulations, multiple design considerations were investigated, such as improvements to building envelope, retrofitting of HVAC and lighting systems, occupancy loads, and application of renewable energy sources for commercial buildings located in cold, mixed and hot climates. The comparative analysis of simulation results was used to determine how specific techniques lead to energy savings in different climate types and for buildings of various shapes and orientations. The research results show that it is possible to meet net-zero energy use with appropriate design manipulations and comprehensive utilization of renewable energy sources.
