Study On Regulating Effect And Optimizing Layout Of Green Landscape On Microclimate Of Rural Residential Area

Using the microclimate regulation effect of green landscape can promote building energy saving and emission reduction and improve the living environment of residential areas.It is of great significance to study the effect of green landscape on outdoor microclimate regulation and the effect of energy saving and emission reduction.In order to discuss the influence law of greening landscape on outdoor microclimate,this thesis comprehensively adopts field measurement,theoretical analysis and numerical simulation calculation to study how to reduce building energy consumption,reduce carbon emissions and improve human thermal comfort of target buildings through greening landscape layout,and proposes greening landscape optimization design strategy through the regulation law of greening landscape on outdoor microclimate.To provide reference and support for the optimization design of rural residential landscape,the main research conclusions are as follows:1)The influence rules of different landscaping elements on outdoor microclimate parameters were obtained.The temperature,humidity,wind speed and solar radiation in Nanwang Village,Xuzhou City in winter and summer were measured on site,and the test period was one week.The ENVI-met software was used to simulate the outdoor temperature,humidity and wind speed in Nanwang Village during the test period,and the reliability of the ENVI-met numerical simulation calculation scheme was verified.Through field measurement and numerical simulation,the influence law of greening landscape elements on outdoor microclimate parameters was obtained.Vegetation,water and other greening landscape elements can cool and humidify in summer,and improve outdoor microclimate.The influence of green landscape on outdoor microclimate in summer is greater than that in winter,and the influence of water is greater than that of vegetation.Green landscape can reduce temperature by 1-3℃ and increase humidity by 3%-5% in summer,but the adjustment effect in winter is not obvious.2)The influence of outdoor microclimate regulation effect on building energy conservation and emission reduction is obtained.The outdoor microclimate parameters obtained by ENVI-met simulation were imported into the meteorological parameter file of DesignBuilder.Through the coupling numerical simulation of ENVI-met and DesignBuilder,the building energy conservation and emission reduction effect of outdoor microclimate regulation effect was evaluated.Using green landscape to adjust outdoor microclimate can reduce building energy consumption,reduce carbon dioxide emissions,improve the quality of living environment,refrigeration energy consumption and energy saving rate of 1%-3%,emission reduction rate of 0.8%-3%.3)The multi-objective optimization model of green landscape layout was established and the optimal optimization scheme was calculated.Considering energy saving rate,emission reduction rate and life cycle cost saving rate,a multi-objective optimization model of green landscape layout was established,and a comprehensive comparative analysis was carried out on four kinds of green landscape layout schemes.The results showed that the combination scheme of arbor,shrub,water body and cement pavement was the best scheme of green landscape layout.Compared with the benchmark scheme,the energy-saving rate,emission reduction rate and life-cycle cost saving rate were 2.9%,2.2% and 1.7%,respectively.4)Put forward the greening landscape layout optimization design strategy.The optimal water area and vegetation area were calculated through the multi-objective optimization model of greening landscape layout.The vegetation layout adopted the combination of multiple tree species,and the optimization of the combination of trees,shrubs and grasses was the best,and the natural soil area of the underlying surface was increased as much as possible.