Energy saving optimization analysis for rural buildings in Guanzhong Area based on multi-factor orthogonal experiment
To address the issues related to the poor thermal performance and low heating efficiency of residential building envelopes in the Guanzhong area of Shaanxi Province,this study focuses on typical residential buildings in the region and analyzes energy-saving optimizations concerning the building envelope and window-to-wall ratio.Using field test and survey data,the DesignBuilder software simulated energy consumption to investigate the impact of the envelope structure and window-to-wall ratio on the heating load,cooling load,and life-cycle investment return ratio of residential buildings in the Guanzhong area.A multi-factor orthogonal experimental method is employed to analyze the energy conservation and economy of each optimization plan with the most suitable comprehensive energy conservation strategy selected.The results indicate that the opti-mal energy-saving strategy for residential buildings in the Guanzhong area is to incorporate an 80 mm thick EPS insulation layer on the exterior wall,add a 60 mm thick XPS insulation layer to the roof,use standard hollow 5+9A+5 glass for the exterior windows,and maintain a north-facing window-to-wall ratio of 0.1,along at a south-facing ratio of 0.3.After optimization,typical resi-dential buildings in the Guanzhong area saved 61.98％of energy,with the average indoor temper-ature increased by 2.78 ℃ on typical winter days.
Guanzhong Area rural buildingsenergy saving optimizationbuilding energy con-sumptioneconomic analysisorthogonal experiment
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