Impact of passive measures on indoor thermal environment and energy consumption under various operating modes of HVAC equipment

Abstract

Based on the characteristics of climatic conditions and intermittent energy use in the hot summer and cold winter regions, this paper takes a simplified residential building in Chongqing as an example, use DesignBuilder to simulate and explore the influence of passive methods on the indoor thermal environment and energy consumption of buildings. To make the cooling method used more in line with the actual situation of the residents, this research uses the passive cooling technology such as sunshades and ventilation, and combine them with the intermittent operated air conditioner to achieve a comfortable condition in the room. Under the thermal parameters of the building envelopes were set according to the current 65% energy-saving standards, the results show that the sunshade combined with the intermittent ventilation can extend the non-air-conditioning period of 2041 hours. The building energy consumption of the method combined intermittent air conditioner with sunshade and intermittent ventilation is 22.2 Kwh/m2, which is 56.5% lower than the continuous air conditioner operation.