Investigating the Energy-Saving Effectiveness of Envelope Retrofits and Photovoltaic Systems: A Case Study of a Hotel in Urumqi

Many of China’s older buildings, built in the 1970s and 1980s, faces several indoor temperature heating energy consumption problems. Based on an investigation analysis old hotel Urumqi, this paper proposes a renovation plan to improve reduce consumption, thereby introduce sustainable development strategy for winter. The effects different plans were simulated using DesignBuilder PVsyst software. results show that improving insulation performance building envelope, including reforming roof, exterior wall, doors, windows adjusting window-to-wall ratio, is primary way If economic conditions allow, we can also install photovoltaic systems roof save significant amount energy. This puts forth specific reconstruction buildings cold regions as well some possible paths other structures according local level provide reference future related studies.