Test Analysis And Simulation Study Of Indoor Physical Environment Of Kiln Dwellings In Western Henan

In order to carry forward and inherit my country’s residential history and culture,strengthen the protection of traditional residential buildings,and improve the indoor living environment of residential buildings,this paper chooses cliff-type kiln buildings in western Henan to conduct on-site testing and simulation analysis of its indoor thermal and humid environment,ventilation environment,and light environment.The study found that the indoor lighting of the cave dwellings is poor,and it is difficult to meet the current building lighting standards.At the same time,the cave dwellings are not well ventilated and the indoor humidity is high.These problems have seriously affected people’s living comfort and physical health.Aiming at the existing problems of the indoor environment of kiln dwellings,this article has done relevant research.The specific research content and main conclusions are as follows:The test found that the indoor illuminance and daylighting coefficient of the kiln building at 12:00 noon are only 150.5(lx),1.35%,and the uniformity of illuminance is extremely small,and the indoor light environment is extremely poor.Through the simulation analysis of the factors affecting the indoor light environment of the cave dwellings,it is found that the indoor daylighting coefficient has a positive linear relationship with the window-to-ground ratio and glass transmittance;it has a quadratic relationship with the height of the window sill;and it has a logarithmic relationship with the depth of the cave dwelling.According to the relationship between daylighting coefficient and influencing factors,the cave dwellings were reconstructed and simulated,and it was found that the light intensity and daylighting coefficient of the renovated cave dwellings increased by 64.4% and 105%,respectively.As the renovated cave dwellings still have insufficient lighting uniformity,artificial light sources are combined for improvement.After adding artificial light sources,it is found that the uniformity of indoor lighting has been improved,and combined with the analysis of the arrangement of artificial light sources,the arrangement of light sources from point to surface can increase the uniformity of indoor light source illumination and the uniformity of global illumination respectively.363.3%and 358.3%.Therefore,the layout of the cave dwelling light sources should be planar,and when the total power is fixed,try to increase the number of light sources to achieve the best indoor illumination uniformity.The kiln building can maintain a stable temperature in both winter and summer.The main reason is that the indoor MRT(mean radiant temperature)has a regulating effect on the indoor temperature.When the outdoor temperature fluctuates in a wide range,the indoor MRT of the kiln building can weaken or suppress the change brought about by the indoor temperature,so that the indoor temperature does not change drastically in the amplitude with the fluctuation of the outdoor temperature,and increases the peak temperature difference between indoor and outdoor the delay time.From a mechanism point of view,this is mainly related to the thermal diffusivity of the soil around the cave dwelling.The thermal diffusivity of the soil around the cave dwelling in summer is lower than that in winter,so it has better thermal insulation for the cave dwelling and makes the indoor thermal comfort higher than in winter.In summer,the indoor humidity in the kiln dwellings is as high as about 90%,and the indoor air velocity is only 0.012m/s,which cannot improve the indoor humidity.In order to improve the indoor wet environment of the kiln dwellings,the paper conducted a simulation analysis on the improvement of indoor ventilation,and obtained natural ventilation under the additional exhaust chimneys.A uniform flow velocity field is formed in the kiln dwellings,and has little effect on the average indoor temperature.Can be used as a ventilation improvement measure under natural conditions.Under the condition of mechanical ventilation,connect the exhaust duct to the exhaust fan above the kiln mouth and set two exhaust outlets to form a uniform flow velocity field in the room,with an average wind speed of 0.4m/s,and maintain the indoor temperature in a comfortable temperature range,it is conducive to the improvement of indoor ventilation and humid environment.Natural ventilation combined with mechanical ventilation can improve the indoor ventilation environment most significantly,and has a suitable indoor temperature,but the average indoor wind speed is slightly larger,0.97m/s,which is suitable for short-term ventilation under the sweltering summer conditions.In addition,in order to further improve the indoor humidity,a lime layer can be used for moisture-proof treatment on the bottom of the kiln building.It is recommended to use 2:8 lime soil,combined with moisture-proof linoleum as the moisture-proof cushion.The research in this article can provide data reference and theoretical guidance for the improvement of the indoor environment of the kiln dwellings in western Henan,thereby improving the comfort of the indoor environment of the kiln dwellings,and has important practical value for the protection of traditional kiln dwellings.