Research On Passive Solar Design Of PCW Prefabricated Residential Houses

With the implementation of the national rural revitalization strategy,the rural economy has made rapid progress,the quality of life of residents has improved significantly,and the production and living style and residence mode have also produced great changes.At the present stage,China’s rural residential building stock accounts for a relatively large amount and the market scale is still huge,but village houses are still facing many problems that need to be solved,and the traditional construction form of self-built and self-occupied buildings can hardly meet the modern residents’ living needs and the sustainable development requirements of residential houses.As a modern form of construction that the country is vigorously developing,the assembled building has achieved good results in China’s urban construction in recent years,which also provides a good example for the construction of new residential buildings in China’s villages and towns.The energy-saving work of residential buildings in rural areas lags far behind that of urban buildings,so it is important to explore the appropriate energy-saving technical path of assembled residential buildings in Shaanxi using low-cost passive solar technology,taking into account the economic situation of rural areas and combining the characteristics of assembled residential buildings.There are many problems in the construction and use of residential houses in rural areas of Shaanxi,and this paper proposes the introduction of assembly building technology and passive solar energy utilization technology to solve the existing problems.Based on the research results of the group’s PCW(Precast Composite Wall)structured assembled residential houses,two passive solar technologies,direct benefit type and additional sun room type,are used to analyze the energy saving effect and optimization strategy of passive solar technology in three representative regions,Ankang,Xi’an and Yulin,through Designbuilder simulation software.The research results show that both passive technologies have the potential to achieve ultra-low energy consumption in the residential houses of PCW structure in the three regions,and the energy saving effect of the direct benefit type technology is better than that of the additional sunroom type,which can save up to 43%～56% of energy consumption according to the current Energy Conservation Design Standard for Rural Residential Buildings as a benchmark,therefore,both technical routes in this paper have certain Therefore,both technical routes in this paper are feasible.Based on the optimization of passive solar technology,the improvement effect of two passive solar technologies on the indoor thermal environment of different size module spaces was further analyzed.The average indoor temperature and APMV index were evaluated accordingly,and a basic comfort module with an average indoor temperature of 14℃ and a high comfort module with an average indoor temperature of16/18℃ were proposed,and the results showed that the direct benefit type modules in each region can meet the requirements of the high comfort module thermal environment,and the additional sunlight room is more likely to meet the requirements of the basic comfort module indoor thermal environment.At the same time,a library of PCW structural residential modules was established based on BIM technology,and the research results also provide technical references for the design,promotion and application of the passive technology of PCW structural residential module space in the future.