Study On Indoor Thermal Environment And Energy Saving Technology Of Sinking Caves In Guanzhong Area

The 13th Five-Year Plan proposes that building a well-off society in an all-round way and promoting the construction of a new socialist countryside is an important national policy currently implemented in China.The improvement of living standards in the western rural areas and the improvement of farmers'living conditions have become the key to the high energy consumption of buildings in the new century.The problem cannot be ignored.China has vast land,and there are countless types of traditional dwellings.Environmental protection and low energy consumption are a major feature of traditional residential buildings.It not only reduces the pressure on the resources of urban high-energy buildings,but also reduces the waste of resources,but the protection Poor structure and indoor thermal comfort are also problems in the current sinking cave dwellings.This paper studies the construction technology of sinking cave dwellings in Guanzhong area from the aspects of materials and design,and designs new energy-saving cave dwellings,which can meet the requirements of rural residents for living conditions,reduce the use of resources,and respond to national construction.The call for a new socialist countryside and the protection of traditional houses.Through on-the-spot investigation and questionnaire survey,the paper analyzes and analyzes the status quo,construction technology and indoor thermal environment of the sinking cave dwellings in Guanzhong area,and analyzes the indoor thermal conditions and draws an understanding of the local residents' living conditions.In order to fully understand the construction characteristics of the sinking caves in Guanzhong area and the impact on the indoor thermal environment,the local typical sinking cave dwellings were selected for the summer and winter seasons,and the average temperature inside the caves was obtained.3.1?,the maximum temperature is only 4.0?,can not reach the living environment requirements,the average summer temperature is 24.5?,the temperature is comfortable but the humidity is large,according to the soil heat transfer mechanism to analyze the heat transfer effect of the winter cave,through its indoor thermal environment Test and analysis,it is concluded that the indoor thermal environment of the cavern is poor in winter and needs to be reconstructed;combined with the economic conditions and living needs of the local residents,it is proposed to carry out energy-saving renovation from the aspects of building orientation,indoor moisture prevention,indoor ventilation and external protection structure;Fluent software performs ventilation simulation calculations,and the outer protective structure is carried out through the modified Trang wall.Optimized processing;using DeST-H simulation software to simulate the sinking cave before and after the transformation,by simulating the influence of different insulation thickness on the building energy consumption,40mm expanded polystyrene board(EPS)was selected as the exterior insulation material.The simulation results show that the temperature of the cave after the transformation is increased by 6.9?,the energy saving rate is 45.08%,and the energy consumption is more obvious.The predicted PMV value of the cavern is increased from-1.77 to-0.73 before the transformation,and the PPD value of the unsatisfactory turnout rate is also predicted.65.8%fell to about 17.4%,and the indoor thermal environment of the cave has been significantly improved.The research conclusions can provide basic information for the study of indoor thermal environment improvement in sinking caves in Guanzhong area.