The Research On Envelope Energy Saving Optimization Of Stone Houses In West Sichuan Plateau

Enclosure structure is the physical boundary of building interior and exterior and the main way of heat exchange.Enclosure structure plays an important role in building energy saving.The progress of materials and construction technology improves the thermal insulation and airtight performance of enclosures,not only enhances the thermal comfort in building,but also reduces energy consumption.The Western Sichuan plateau is with high altitude and the temperature in winter is very low.In order to obtain the ideal living environment,the local residents have built a large number of stony residential buildings with unique ethnic characteristics,in accordance with their own production and living needs,economic ability and aesthetic concept,combined with the local geographical and climatic conditions,customs and habits,and taking materials into consideration according to local conditions.Although the stone residence has the thick exterior wall and small windows,the indoor comfort still can not reach the resident to the heat comfortable request.The main reason of this phenomenon is the poor heat insulation and airtightness of doors and Windows.As an important part of residential building,the thermal insulation directly affects the indoor thermal comfort.Therefore,it is necessary to analyze the surrounding structure of Tibetan and Qiang stone residential building in the Western Sichuan plateau,and then put forward meaningful energy saving optimization measures.The main content of this paper is the energy saving optimization method for the enclosures of stone dwellings in the Western Sichuan plateau.It mainly aims at the energy saving construction technology of various elements of enclosures,such as wall,roof,door and window,ground,etc.Combining traditional materials and practices with new technologies and new energy saving materials,the energy saving technology suitable for local stony dwellings was discussed by means of the simulation software De ST-H.Firstly,the stone dwelling in the Western Sichuan plateau is taken as the research object,and the typical village is chosen to carry out field research and analysising of the characteristics of stone dwellings in the Western Sichuan plateau and the problems of their enclosures.Secondly,according to the present technology of our country,the principle and characteristic of heat preservation and insulation of outer protective structures are expounded from the angle of different materials and different construction practices.Then,according to the current technology in our country,the principle and characteristics of the external enclosure structure are expounded from the perspective of different materials and different construction methods.Based on the actual situation of the stone residential buildings in the Western Sichuan Plateau,this paper puts forward the principles of regional,economic and low technology as the implementation principles of energy conservation for stone residential buildings.Finally,the energy-saving optimization strategy for new and rebuilt residential buildings was put forward,and three groups of optimization schemes were proposed.Energy consumption simulation was carried out by using the energy consumption simulation software De ST-h.Through the comparison of the energy saving rate of each scheme,the energy-saving optimization scheme was selected which was beneficial to the stone masonry residents to achieve high efficiency.