| In order to study the effects of building layout,building spacing,building orientation,ventilation path,ventilation area,and air outlet distance from the ground(floor)on the indoor natural ventilation effect of residential buildings,this paper selects a residential building in Chengdu area as the basic physical model,and considers indoor comfortable air velocity area ratio,average indoor air temperature,temperature inhomogeneity coefficient,and average air age as ventilation effect evaluation indexes.The orthogonal design and Fluent numerical simulation are used to investigate the indoor natural ventilation effect of different outdoor and indoor building design parameters under different combinations of working conditions.In this paper,in order to validate the reliability of the numerical model,to find and confirm the basic model of related parameters Settings,has carried on the contrastive analysis of the field measured data and simulation data,the results show that the indoor temperature,velocity change trend is consistent,the error within the acceptable range,set the reliable foundation model,can be used to predict temperature field,velocity field distribution of the natural ventilation room.Paper first keep indoor building design parameter Settings(the contralateral side on a path of ventilation,indoor ground area of 10% of the air area and 1.0 m distance from the ground),to explore the architectural layout,architechtural distance and architectural toward the three design parameters on the effects of the indoor natural ventilation by using orthogonal table by numerical simulation,the condition of nine.Through orthogonal analysis and simulation results,and comprehensively balancing the evaluation index of indoor ventilation effect,the optimal combination scheme of outdoor building design parameters is as follows: staggered building layout,the building spacing coefficient of 0.7,and building orientation of 45° Angle between the long direction of the building and the inlet wind direction.Then on the basis of the optimal combination plan of outdoor outdoor architecture design parameters Settings,remains the same,different interior architectural design parameters on the effects of the indoor natural ventilation is simulated by using orthogonal table organization ground distance between air path,ventilation area,three parameters of 9kinds of working conditions of indoor natural ventilation,by orthogonal analysis of simulation results,It is concluded that the best combination scheme of interior building design parameters with comprehensive effect is as follows: ventilation path on opposite side,ventilation area of 9% ground area and the distance between tuyere and ground with a height of 1.0m from the floor.In order to further study the influence of the combined effect of outdoor and indoor architectural design parameters on the effect of natural ventilation,the paper organizes the simulation of the six outdoor and indoor design parameters according to the orthogonal plan,and draws that the recommended "optimum plan" under the combined influence conditions is The optimal combination of outdoor and indoor solutions,namely staggered building layout,0.7 times the building height of the building spacing,building length and the incoming wind direction at an angle of 45°,building orientation,opposite side ventilation path,9% of the ground The ventilation area of the area and the distance of the air outlet 1.0m from the floor to the ground.Finally,this paper also uses the multiple linear regression method to obtain the approximate linear regression equation of the comfortable wind speed area ratio and the outdoor and indoor architectural design parameters,and analyzes the order of the influence of each building design parameter on the comfortable wind speed area ratio.This paper organically connects outdoor wind environment,indoor wind environment,air supply effectiveness and human thermal comfort.It has certain guiding significance for building design parameter settings for indoor healthy and comfortable ventilation environment.The research results can be widely used in various residential buildings. |
