Influence of Heat Reflective Wall on Air Conditioning Energy Consumption of Office Buildings in Chongqing

Abstract

As the main channel of heat and humidity exchange between the building and the external environment, the improvement of the thermal insulation performance of the external wall is crucial to reduce the building energy consumption. However, the influence of heat reflective exterior walls on the energy consumption of air conditioning is rarely studied. This paper aims to study the effects of heat reflective walls on air conditioning energy consumption (ACEC) through testing and simulation. The measured results show that the heat reflective exterior walls will reduce the summer ACEC of the room and increase the ACEC of the room in winter, but the contribution rate is higher in summer than in winter. At the same time, the ACEC simulation results show that the energy saving per unit area of the heat reflective wall of the office building is 0.0149 kWh/(m2•a) for the west outer wall, 0.0131 kWh/(m2•a) for the east outer wall, 0.0121 kWh/(m2•a) for the south outer wall, and 0.0113 kWh/(m2•a) for the north outer wall. These provide a useful reference for the research and application of heat reflective walls in Chongqing.