| At present,the study of human settlement environment has made great progress,the indoor environment comfort requirements are more and more strict,indoor physical environment will have a direct impact on indoor people’s work,study,living conditions and physical and mental health development.In this paper,the indoor light environment,heat and humidity environment and ventilation environment of a graduate studio in a university in northern Anhui are tested and simulated.The main research work is as follows:First of all,through the field test of TA8120 series digital illuminance meter,it is known that the daylighting effect in this room is extremely poor.Only 0.5m near the window can meet the lighting requirements and only 10:00～15:00 in a day can meet the lighting standards.A hybrid light source was set up to improve the indoor light environment in the daytime.The maximum illumination was 448 lx,and the minimum illumination was 223 lx.The hybrid light source could make 80% of the measuring points in the room meet the lighting standards,and the fluorescent lamp arrangement could meet the lighting requirements at night.According to the simulation of different shading methods by ECOTECT software,there are excessive shading behaviors in the original comprehensive shading conditions,and the shading effect of horizontal shading is 10%higher than that of vertical shading.Therefore,it is necessary to optimize the size of horizontal shading to improve the indoor light environment.Secondly,through the stability analysis of the four existing temperature and humidity measuring instruments in the laboratory,DT321 S,JTSOFT-JN software and temperature field measurement points are selected as indoor and outdoor temperature and humidity measuring instruments and can monitor the indoor temperature changes and distribution.Test analysis shows that there is thermal stratification in the indoor thermal environment in summer,which is more serious when the heat and humidity equipment split body heat pump type floor room air conditioner(Gree KFR-72LW)is opened.In sunny days,the maximum temperature change is about 2.87℃/m,which exceeds the standard temperature difference between head and foot,which will cause discomfort to human body.Summer rainy days,indoor humidity maintained at 85%～90%,with the higher temperature in summer,indoor staff will have a "stuffy feeling".Although the temperature can be adjusted by the thermal and humidity equipment in summer,the temperature can be stabilized at 22～25℃ and the humidity can be stabilized at 30%～50%,but the thermal stratification phenomenon and the improvement of humidity need further study.Finally,through the field test,the indoor wind speed was close to 0m/s and the ventilation environment was extremely poor.FLUENT software was used to simulate the improvement measures.By including natural ventilation,mechanical ventilation and natural ventilation + mechanical ventilation in Through the simulation analysis of six improvement schemes,it is found that the uniform flow rate field can be provided by adding small Windows,which is suitable for long-term ventilation;By adding ceiling fans,indoor wind speed and convective heat transfer can be increased to provide high air exchange and uniform temperature field,but if the wind speed is too large,there will be a "blowing sense".The optimal position of mechanically ventilated ceiling fan is 5/6 from the depth of the window,and mechanical ventilation is suitable for short-term ventilation.The scheme of natural ventilation + mechanical ventilation is more suitable for the improvement of indoor ventilation environment of the building.The research content of this paper can provide reference and theoretical guidance for the design and optimization of indoor physical environment in northern Anhui,so as to improve the comfort of indoor light,heat,humidity and ventilation environment and make it more friendly to indoor people.Figure [45] Table [16] Reference [84]... |
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