Mechanism Of Creating Indoor Thermal Environment In Pit Courtyard In Western Henan

With the rapid development of social economy and the acceleration of urbanization,people’s living standards have been continuously improved,and the problem of energy consumption has become increasingly prominent.Building is an important source of total social energy consumption,and improving building energy efficiency is one of the most effective ways to achieve sustainable development.The climate adaptation strategy of traditional houses can effectively improve the indoor thermal environment.Therefore,the research on the climate adaptation strategy of traditional houses can provide new ideas for the design of modern energy-saving buildings.Pit courtyard in western Henan is a traditional folk house with regional characteristics,which effectively utilizes local natural resources,creates a relatively good indoor thermal environment for residents,and forms a kind of green wisdom in the process of construction.This study takes the pit yard in western Henan as the research object,and quantitatively analyzes its climate adaptation strategy by means of field investigation,field test,questionnaire survey and numerical simulation,and analyzes the indoor thermal environment building mechanism of the pit yard in western Henan.This paper is mainly divided into the following steps:(1)Through on-the-spot investigation of 46 pit yards in 7 villages,the architectural characteristics of traditional pit yards are summarized,and representative cases are selected to qualitatively summarize the climatic adaptability design methods of traditional pit yards,including architectural form design and thermal design of envelope;(2)Through the short-term test of the typical traditional pit yard in winter and summer,the indoor and outdoor thermal environment during the test period is mastered and the relevant parameters for model verification are obtained;(3)Through field test and questionnaire survey,it is found that the thermal neutral temperature in summer in the pit yard in western Henan is 25.4℃,and the upper limit of acceptable temperature is 27.1℃;The thermal neutral temperature in winter is 15.4℃,and the lower limit of acceptable temperature is 10.5℃.Provide a basis for the subsequent thermal environment evaluation;(4)Using Energy Plus to establish a benchmark model and verify the model.Based on the data of typical meteorological years,the typical seasonal thermal environment of the traditional pit yard is simulated,and the indoor somatosensory temperature ranges in summer and winter are calculated to be 18.4～28.6℃ and 2.9～11.9℃ respectively.(5)Carry out parametric analysis on climate adaptive design methods,simulate the typical seasonal thermal environment of different climate adaptive design methods by software,Based on the acceptable temperature range obtained in the third step,an evaluation index,ATDV(Acceptable temperature deviation value),is introduced to quantify the impact of each climate adaptive design method on indoor thermal environment,and finally evaluate and rank the results.The ranking results are as follows: in the aspect of architectural form design,the overburden is the most influential factor,and the other methods are ranked in order:architectural orientation,building height and depth-width ratio;In the thermal design of envelope,thermal inertia of roof has the greatest influence,and the other methods are ranked as follows: thermal inertia of roof,thermal inertia of interior wall,thermal inertia of exterior wall and thermal inertia of interior wall.The research results theoretically explain the formation mechanism of indoor thermal environment of pit courtyard dwellings in western Henan,which creates conditions for inheriting the wisdom of traditional dwellings.In practice,it provides a reference for architects to design residential buildings in western Henan or under the same climate conditions.