Study On Indoor Thermal Comfort Of Winter Rural Houses In Cold Areas

In the long winter in the severe cold area,the rural residents spend most of the time indoors.The indoor thermal comfort has a different degree of influence on the villagers' psychology and physiology.Thermal comfort is closely related to people's health,life and work efficiency.Environmental factors and personal factors are the main reasons that affect the thermal comfort of human body.This paper mainly adopts field survey,model design and software simulation method to conduct research.The physical mathematical model of heat exchange between human and environment is set up.The parameters of the thermal comfort of the farm house are optimized by multiple coupling methods.The MATLAB software is used to calculate and obtain the basic data,and the related research is carried out according to the data obtained.The influence of typical residential structure on human thermal comfort is analyzed.Using Design Buider software for model design.Combined with the PMV-PPD evaluation standard,the simulated data are analyzed and verified.It is concluded that the best agricultural residence structure accords with thermal comfort condition.The main research contents and results are as follows:(1)When the ambient wind speed is 0?v?0.3m/s,and the relative humidity of indoor is25%???60%,the temperature range of indoor thermal comfort temperature in the farm house is 12.33~15.63?.With the increase of relative humidity,the requirement of indoor thermal comfort temperature gradually decreases,and the thermal comfort index PMV increases gradually.Therefore,appropriately increasing indoor humidity in winter can help improve indoor thermal comfort and reduce thermal comfort temperature,which is conducive to energy saving.(2)When indoor relative humidity is fixed,the requirement of indoor thermal comfort temperature increases with the increase of ambient wind speed,and the thermal comfort index PMV fluctuates.When ?=35%,the ambient wind speed is 0m/s,and the thermal comfort temperature is 12.91 ?.When ?=40%,the environment wind speed 0.2m/s,the thermal comfort temperature 14.7? is the best.When the?=45%,the ambient wind speed 0.1m/s,thermal comfort temperature 13.62? is the best;when ?=50%,the ambient wind speed0.1m/s,thermal comfort temperature 13.51? is the best.(3)Design-builder software was used to build four typical rural residential structure models in cold regions,and the thermal comfort of four types of rural houses was analyzed from the structural form.In the PMV comparison of the four types of farmhouses,the PMV changes of the 1 and 2 bedrooms of the a and d types are higher than those of the PMV in the corresponding b and c farm houses,and the PMV distribution trend of the living room of a,band d is basically the lowest.On the one hand,this paper analyzes the best heat comfort zone in winter indoor house in cold area,and on the other hand,it gives the typical structure form of farm house under the condition of thermal comfort.This study has some guidance to improve the living comfort and livability of rural residents,and enrich the research of the indoor thermal comfort in the cold area of rural areas.