Analysis On The Influence Of Indoor Light And Heat Environment Of Residential Buildings In Cold Areas

At present,due to energy shortage and serious environmental pollution,building energy consumption accounts for about 30%of total energy consumption.How to improve indoor air quality while reducing indoor energy consumption is one of the important research topics.A reasonable building maintenance structure can effectively improve natural ventilation,take away indoor heat,improve indoor comfort,and increase indoor natural light intensity,thereby reducing indoor energy consumption.Therefore,reasonable structural maintenance structure design is essential.In view of the fact that the current design of the enclosure structure is broad and flexible,this paper focuses on the theoretical study of the window and wall comparison of the thermal and humid environment,the influence of light and load,the experimental test analysis and the mathematical model analysis.Firstly,the convective heat transfer process in natural ventilation and the indoor diffuse reflection process under natural light irradiation are studied.The indoor photo thermal environment simulation model and the calculation method of cooling(warm)energy consumption are proposed.On this basis,the indoor light and heat environment and energy consumption are numerically calculated to determine the influence of indoor window and wall ratio on the building heat and humidity environment,light and load:The indoor hot and humid environment is more parabolic than the building window.When the window wall is small,the indoor comfortable space increases with the window-to-wall ratio.When the window-to-wall ratio reaches 0.344,the indoor comfort is optimal.When 93.1%of the indoor space is in the thermal comfort state of the human body,when the rear window ratio continues to increase,the indoor comfort space becomes smaller,and the indoor coldness increases;As the window-to-wall ratio increases,the average luminance of the room increases with the increase of the window-to-wall ratio.The lowest value is 941.87 lux when the window-to-wall ratio is 0.137,which meets the minimum indoor demand;As the window-to-wall ratio increases,the cooling load of the building envelope increases continuously.When the window-to-wall ratio is 0.461,the maximum value is 2548.5W,which is about 2.5 times of the cooling load of the envelope structure when the window-to-wall ratio is 0.115.The chilling air volume of the window is also increasing.The maximum value of the heating load is 11.62W when the window-to-wall ratio is 0.461,which is about twice the cooling load of the envelope structure when the window-to-wall ratio is 0.115.The window wall ratio increases as the ratio increases.Secondly,through the experimental test method,the distribution law of indoor heat and humidity environment and light intensity is obtained:The overall change of indoor temperature is not obvious,but the wind speed and light gradually weaken along the direction of the window,and the humidity changes fluctuate greatly.In the parallel lines along the two windows,the trend of change is basically the same,and some points are biased;The simulation results are verified:the simulation results are basically consistent with the experimental results.At the same time,through the test of the performance of the fresh air system:the cabinet type fresh air system and the ground-row fresh air system can meet the indoor air quality demand,but the performance of the ground-type fresh air system is better than the cabinet-type fresh air system,and the mechanical ventilation is used for natural ventilation.Optimized indoors when it is not possible to meet indoor needs.Finally,through the optimization of indoor photothermal environment simulation and indoor load calculation results,the mathematical model of the influence of indoor window and wall on thermal and humid environment,illumination and load is given by least squares method:mathematical model of influence of window and wall on indoor heat and humidity environment,mathematical model of the influence of window and wall on indoor illumination;mathematical model of the influence of window and wall on indoor load.For the comprehensive analysis of the three,from the perspective of mathematical models,priority is given to indoor energy consumption,followed by indoor thermal and humid environment,and finally considering the light weight.In this paper,an indoor Thermal-Humid and illumination environment test system is built.Through the experimental measurement of indoor temperature,humidity,wind speed and illumination parameters,the influence trend of window-wall ratio on indoor thermal-thermal environment is analyzed under the condition of fixed distance ground height and shape.The indoor Thermal-Humid and illumination environment model is established,and Airpak is used to simulate and analyze the indoor Thermal-Humid and illumination environment,and the window-wall ratio is obtained by fitting the simulation results.The influence equation of indoor heat and humidity,illumination environment,cold and heat load,and the accuracy of the analysis results;comprehensive analysis of the influence weight of the three in the process of architectural design,the paper has a certain theoretical guiding significance for architectural design.