Low Carbon Energy Efficiency Evaluation And Optimization Strategies For Existing Passive Solar Houses In Rural Houses In The Jiao Lai Plain

The promotion and application of passive solar house technology in the rural areas of the Jiao Lai Plain is gradually gaining ground,but energy statistics report data show that rural houses still suffer from high carbon emissions and energy consumption.In order to study the low carbon and energy saving effect of the existing passive solar house in the rural areas of the Jiao Lai Plain,this paper proposes a targeted optimization strategy and discusses the system boundary of the life cycle of the existing passive solar house in rural areas from the study of building life cycle evaluation theory.Based on the Carbon Emission Calculation Standard for Buildings GB/T51366-2019(hereinafter referred to as "the standard"),the low carbon energy saving effect of the existing passive solar houses in the region is evaluated and an optimization strategy is proposed.The main tasks are as follows.Firstly,a mathematical model was developed to evaluate the carbon emissions and energy consumption of existing rural solar houses according to the carbon emission calculation method in the standard.The model includes a validity test model based on the criteria of "whether carbon and energy neutrality can be achieved" and a necessity test model based on the criteria of "carbon and energy neutrality cycles".Secondly,a field study was carried out in 15 villages in 7 towns in a typical area of the Jiao Lai Plain by means of field measurements and questionnaires.Based on the results of the study,the rural houses and solar houses were classified,and the most typical brick-and-mortar and brick-and-wood(i.e.,with a wooden roof frame and masonry walls)houses were selected."Concrete roof","color steel sandwich panel roof","double-sloped roof" and "temporary".The third is based on field research and classification.Thirdly,based on the field research and classification,a sample model of existing solar houses and a sample model of farm houses of two structures were developed.The carbon emissions and energy consumption of the sample models were calculated in the physical phase and the carbon emissions and energy consumption in the operational phase.A comparative analysis was carried out on the effectiveness of the same type of solar house on different types of farm buildings and on the effectiveness of different types of solar house on the same type of farm buildings,and based on the results of the analysis,an evaluation of the low carbon and energy efficiency of the existing solar house model was made.Finally,based on the results of the evaluation,the most effective and suitable sample solar house for rural use was selected,and the optimization strategies were developed and verified in terms of replacement of building materials,modification of the envelope structure,internal space of the solar house,solar heat gain,and night-time insulation measures.