The Study On Indoor Thermal Environment In Natural Ventilation Affected By Environmental Parameters And Wall Openings

To seek the method of both comfort and energy-efficient natural ventilation has been more and more attended in academia.Based on the literature reviews of relevant research findings at home and abroad,this research explored the influencing factors of indoor thermal environment and thermal comfort of human body in natural ventilation,by the numerical simulation and the experimental study of the process of natural ventilation of inlet and outlet windows of single area building with the single heated point source.This research project simulated the outdoor thermal and wind environments by the constructing of the artificial environment control comprehensive experiment lab,and simulated the process of natural ventilation of inlet and outlet of single area building by setup the model room.In order to find the similitude ratio between the model room and the actual room,it was carried out to confirm the ratio of similitude to the process of natural ventilation of model room.The software of ANSYS-CFX was adopted to carry out the numerical simulation of indoor thermal environment and thermal comfort of human body in the process of natural ventilation provided with inlet and outlet windows of single area building with the single heated point source,and explored the variations of indoor thermal environment and thermal comfort of human body effected by parameters of outdoor temperature,outside wind velocity,“area ratio of wind to wall”of inlet/outlet windows,location of inlet/outlet windows,area ratio of inlet/outlet windows,the single heated point source.By comparative analyzing and demonstrating numerical simulation results and experimental data,and consummating numerical simulation,this paper could prove feasibility and accuracy of using the method of numerical simulations and experiment research to forecast and analyze natural ventilation indoor thermal environment and thermal comfort of human body in the two draught single areas building in a particular situation.By means of numerical simulations and experiment research of natural ventilation mold room,under the working condition set in this paper,it could draw several conclusions.(1)By demonstrating,the artificial environment comprehensive test bed stand built in this papercould be used to simulate the outdoor thermal environment and the outdoor windenvironment,and the mold room built could be used to simulate natural ventilation processof two draught single area building,to research natural ventilation indoor thermalenvironment and thermal comfort of human body effected by wind pressure and?thermocompression fluid-structure interaction.(2)By method of numerical simulation results and experimental research,and by inducing,analyzing and summarizing,this paper could learn the influence factor of natural ventilationindoor thermal environment and thermal comfort of human body,including following seven:outdoor temperature,outdoor wind speed,intake air window site,intake air window size(glazing ratio),air-out air window site,air-out air window size(glazing ratio),indoorsingle-point heat source heating value.(3)In the condition of other parameters unchanged,the trend of bulk temperature,average windspeed,distribution of temperature,average Predicted Percent Dissatisfied in naturalventilation model room are shown in the following table:...