| Under the strategic plan for rural revitalization,improving the rural living environment,highlighting the rural characteristics and ethnic regional characteristics,has become an urgent need to build ecologically livable beautiful villages.With the continuous improvement of living standards,people are paying more and more attention to the indoor thermal environment of residential buildings.Improving the indoor thermal environment of rural residential buildings and improving the efficiency of energy use have received more and more attention.The roof occupies a large proportion of the area of the outer envelope of the rural house,and the construction method is complex and diverse.It accounts for a considerable proportion of the total energy consumption of the outer envelope.And improving indoor thermal comfort.Yi nationality Autonomous County is located in the Xiaoliangshan area,belonging to a high-altitude low-lying valley.After a long-term geographical and climatic environment,both the building structure and the building form have formed distinctive Yi national characteristics.Based on domestic and international research theories of indoor thermal environment,this article takes Yi ethnic rural dwellings in Ebian area as research objects,and uses field surveys,field tests,theoretical analysis,and simulation methods to explore the different thermal properties of roof construction materials on farm houses The influence of indoor thermal environment,put forward the optimization principles and optimization strategies of roof construction materials for Yibian rural houses.Firstly,the status quo investigation and analysis of the buildings and roofs of Yi nationality houses in Ebian area were conducted.The survey content includes the distribution status of the rural houses of the Yi nationality in Ebian,the construction dates of the rural houses,the floor plan,the orientation,the satisfaction of thermal comfort,the current energy consumption,and the form,structure,and functions of the roof.According to the survey,the farmhouses of the Yi nationality in Ebian are distributed in the high mountain area,the middle mountainous area,and the low mountain area according to the different altitudes.According to the construction time of the farmhouse,it can be divided into four stages: the traditional farmhouse stage,the finished farmhouse stage,and simple imitation of traditional The stage of farm house is similar to the traditional stage.Based on the building materials,the main types of existing houses of the Yi people can be divided into: cottages,tiled houses,tiled houses,and bungalows.On this basis,five typical farm houses were selected for indoor thermal environment parameter field measurements,and the thermal environment of the Yi farm houses in Ebian area was poor.Secondly,this paper analyzes the thermal properties of the existing Yibian farmhouse roof construction materials in Ebian.Starting from the characteristics of the roof types of Yibian rural houses,the roof construction materials of thatched houses,tiled houses,tiled houses,and bungalows were separately demonstrated.At the same time,the thermal parameters K and D values of the roof materials of rural houses were calculated.The comparative analysis of the standard low limit values of Residential Building Energy-Saving Design Standards(GB / T50824-2013).The research found that the current thermal performance parameters of the roof of Ebian farmhouses can only reach the specified limit;the thermal performance parameters of tile roofs,small green tile roofs,glazed tile roofs,and bungalow roofs cannot meet the requirements,and The heat transfer coefficients are all larger than the specified limits.Then,use software simulation to analyze the influence of bungalow-concrete roof and tile-slope roof of different construction materials on the indoor thermal environment.The thermal environment analysis function of the Design Builder software is used to build a model with reference to the tested current residential bungalow-concrete roof and tile-sloped roof of Ebian.The control variable method is adopted to change the setting of the material parameters of the roof to meet the requirements.The requirements of the “Design Standard for Energy Efficiency of Rural Residential Buildings”(GB / T50824-2013)on the thermal performance limit of the roof,while keeping other parts inconvenient,analyze the indoor thermal environment changes based on the Fanger PMV evaluation.The study found that,taking the living room of a farmhouse as an example,the indoor thermal comfort improved significantly throughout the year,between warm and cold,basically meeting the comfort requirements.Finally,the principles and strategies of roof optimization of Yibian farmhouses are proposed.Based on the foregoing research,the optimization design principles of the Ebian Yi farmhouses are proposed: the optimization of the roof structure is consistent with the cultural values of the Ebian Yi people,based on the inheritance of the traditional folk houses of the Ebian Yi people,the continuation and exploration of appropriate technologies,and the regional environment as the Basic principles of farm house construction,utilization of material resources,and economic and practical considerations.Finally,according to the roof optimization principles and simulation optimization research,the optimization strategies of the tile-sloped roof and bungalow concrete roof construction materials that are typical of Ebian Yi houses are proposed,with a view to providing a reference for the next stage of Yi village houses in Ebian. |
