Abstract：

Promoting the construction of ultra-low energy rural residential buildings is one of the important tasks in achieving the “carbon peaking and carbon neutrality” goals in the building sector. However, the energy-saving foundation of rural residential buildings is weak, and there are significant differences compared to urban residential buildings in terms of energy consumption characteristics and thermal comfort requirements. Therefore, the energy efficiency design indicators of ultra-low energy rural residential buildings should not implement the GB/T 51350-2019Technicalstandardfornearlyzeroenergybuildings. Based on the analysis of current standard requirements and the demand for rural heating and air conditioning in different climatic zones of Shaanxi Province, the energy-saving rates and energy efficiency design indicators for ultra-low energy rural residential buildings are proposed. Using the method of individual room intermittent heating energy consumption calculation, this paper simulates and analyses the heating energy consumption of three typical rural residential buildings in different climatic zones of Shaanxi Province under different energy-saving levels of envelopes. Based on the GB/T 50824-2013Designstandardforenergyefficiencyofruralresidentialbuildings, a reduction of more than 50% in energy consumption is set as a restrictive condition to determine the thermal performance indexes for ultra-low energy rural residential building envelopes. This will provide support for the standardized construction of ultra-low energy rural residential buildings.

Keywords:ultra-low energy; rural residential building; energy-saving rate; individual room intermittent heating; envelope