Research On Outdoor Thermal Environment Of Residential Quarters Based On Different Greening Layout Patterns

The advantages and disadvantages of the outdoor thermal environment of the building are crucial to the sustainable development of the building.The planning and implementation of the outdoor thermal environment of the building plays an important role in the comfort of the building.The optimization of the outdoor thermal environment of the building not only helps to reduce the energy consumption of the building,but also helps to improve the urban heat island effect.A good outdoor thermal environment requires the protection and implementation of various energy-saving measures,while the outdoor greening arrangement of the residential quarter can be on the one hand The energy consumption and the natural ventilation of the building's interior,on the other hand,contribute to the improvement of the outdoor thermal environment of the building.Through reading the literature,the domestic and international evaluation standards of outdoor thermal environment and the evaluation criteria of outdoor wind speed comfort are summarized.According to the outdoor green layout mode of the building,the characteristics of the outdoor thermal environment of high-rise buildings and low-rise buildings in Xi'an were studied through software simulation and on-site measurement.The Ecotect and Phoenics software were used to simulate the outdoor sunshine conditions and outdoor wind environment.The green layout mode of single-row trees,double-row trees,and mutual planting modes has improved the outdoor wind environment of the building to improve the pedestrian comfort of the outdoor thermal environment.The outdoor thermal environment of the low-rise building was measured in the field,and the parameters such as outdoor air temperature,ground temperature,relative humidity and outdoor wind speed were obtained.The comparative analysis method and qualitative and quantitative analysis method were used to measure the wind speed and the greening condition.The outdoor wind speed results were quantitatively compared and analyzed,and the effect of greening on the outdoor thermal environment of the building was obtained.In order to study the effect of greening on building energy conservation,a regression model was used to calculate the impact of greening on building energy savings.Through the analysis of the simulation results and the measured data,the paper draws the following conclusions:(1)The effect of trees on grassland and grassland can be reduced by 4.25 °C,and the grassland can lower the ground temperature compared with cement floor.At 12.1 ° C,the permeable brick floor can be lowered by 10.2 ° C compared to the cement floor.(2)The improvement effect of the greening type on the outdoor thermal environment of the building is: arbor> sinking green land> grassland.(3)The effect of the ground type on the cooling effect of the outdoor thermal environment is: grassland > permeable brick > cement floor.(4)The greening mode of double-row trees arranged in the high-rise building layout of the enclosed structure has a better effect on the improvement of the outdoor wind environment of the building.(5)The double-row tree and grassland mutual planting mode of the outdoor layout of the building can greatly improve the distribution of the outdoor wind field of the building.(6)The outdoor building greening in summer can save 13.43 percent of energy compared with the cooling capacity of the outdoor air-conditioned room.The research methods and conclusions of this paper can provide a certain reference for the optimization of the outdoor thermal environment of the building,which is conducive to the construction of a good living environment outside the building,and can save certain energy.There are 83 pictures,29tables and 120 references in this paper...