Study On Energy Saving Renovation Of Native Soil Dwellings In Lanzhou Based On Indoor Thermal Environment Analysis

In today’s society under the dual pressure of environmental degradation and energy crisis,it is of great significance for building energy conservation and rural revitalization to re-examine the concept and technical route of ecological architecture in terms of indigenous dwellings,natural environment and energy resources.Adobe building and overburden building in traditional raw soil building widely exist in northwest China,but the seismic level of traditional raw soil building is low,and the durability of building is poor,so it is gradually eliminated in today’s society.However,the sintered brick and concrete materials widely used in rural residential areas are high in energy consumption and environmental pollution.From the perspective of energy conservation and environmental protection,they cannot be compared with raw soil materials.In recent years,researches on the modification of raw soil in China are emerging one after another.To some extent,the properties of raw soil materials have been improved and related technical researches have become more and more perfect.However,few projects have been put into actual construction.In the era of the wide popularity of concrete buildings,how to make the raw soil architecture to be accepted by the public again is an important subject in the study of raw soil architecture.After solving the problem of poor mechanical properties of raw soil materials by means of modification,the quantitative analysis of its impact on indoor thermal environment and house heating energy consumption,and the evaluation of indoor thermal environment is an important link to promote the modification of raw soil dwellings.In northwest China,especially in lanzhou,which is rich in solar energy resources,making full use of solar radiation heat energy to solve the problem of winter heating and optimize the indoor thermal environment of houses in winter plays an important role in improving the comfort of residents and popularizing modified native dwellings.This study according to the situation and environment generates local-style dwelling houses in lanzhou resource conditions,according to the characteristics of the modified raw soil materials,traditional generates local-style dwelling houses of indoor thermal environment and energy consumption problem of heating in winter,the modified raw soil materials and the organic combination of passive solar heating technology,puts forward the modified raw soil materials and the design of passive solar heating technology synergy strategy,give full play to the advantages of both,to improve the safety and comfort of cold region generates local-style dwelling houses,to reduce the energy consumption of heating in winter,puts forward a new design idea for the new rural residential construction.Taking the native soil dwelling houses in lanzhou area as the main research object,the survival status,architectural forms,construction techniques and heating methods of native soil dwelling houses were investigated on the spot.The characteristics of traditional native dwellings are analyzed and the typical forms of native dwellings are summarized.The problems of poor seismic resistance,backward construction technology,low heating efficiency and high energy consumption are summarized.By using Ecotect Analysis software to model typical raw soil dwellings,the indoor temperature and annual heating energy consumption of raw soil dwellings on the coldest day in winter were simulated,and the influencing factors of indoor temperature and heating energy consumption of raw soil dwellings were analyzed.Combined with the status quo of native soil dwellings in the prefecture obtained from the investigation,the modification tests of native soil materials were carried out to solve the problems of poor durability of the surrounding structure,poor installation conditions of house heat-collecting components and low utilization rate of solar energy.By adding modified materials,the compressive strength and thermal properties of raw soil materials are improved,so that the modified raw soil can strengthen the mechanical properties of the house wall through certain structural forms and construction techniques,improve the durability and stability of the house,and improve the thermal insulation performance of the wall.In order to further improve indoor thermal environment and indoor heat gain in winter,the optimization strategy combining modified raw soil materials and passive solar heating technology was put forward.This paper introduces the principle of common passive solar heating technology and analyzes their advantages and disadvantages.The feasibility of using passive solar heating technology to improve indoor thermal environment in lanzhou in winter was analyzed.Finally,according to the design standard of building energy conservation in cold region,combined with the local natural environment and resource conditions,the design strategy of modified raw soil passive solar energy residential was put forward.Ecotect Analysis software was used to simulate the indoor temperature and heating energy consumption on the coldest day in winter of the raw soil dwellings under this strategy,and compared with traditional raw soil dwellings,the fine performance of raw soil dwellings in improving indoor temperature and reducing heating energy consumption by using passive solar heating technology was quantitatively analyzed.The energy saving design principle of native dwelling in lanzhou rural area is summarized,and the future prospect of passive solar energy technology and native dwelling in the process of rural building energy saving and sustainable development is prospected.