Field Measurement And Thermal Comfort Of Hangzhou Guo Zhuang

In order to explore the microclimate effect of Hangzhou classical gardens,this paper takes Hangzhou Guo Zhuang as the research object,through field investigation,field measurement and other methods,combined with Rayman1.2 and SPASS,to analyze the microclimate elements change and thermal comfort in spring,summer and winter in the sample plot,and concludes that:Among the observed microclimate elements,except for the occasional and no obvious regularity of instantaneous wind speed,the other microclimate elements are consistent with the changing trend of the climatic background.Among them,the air temperature and relative humidity in Guo Zhuang are similar to those in meteorological stations,but the fluctuation range is relatively small,and the time of the highest and lowest values are different.The air temperature is mainly affected by solar radiation,and the level of solar radiation plays a decisive role.The air temperature at the measuring point of direct solar radiation is basically maintained at a high level.The change of relative humidity is inversely proportional to solar radiation and air temperature.The order from high to low is summer > spring > winter.At the same time,the cold lake effect of the West Lake dominates the wind environment in Guo Zhuang,and the order of wind speed from high to low is winter > summer > spring.In terms of comfort,the highest correlation with thermal comfort is solar radiation and temperature,followed by wind speed,and finally air relative humidity.When the summer temperature is over 33 C and the relative humidity is over 45%,the relative humidity increases by more than 1.5%,and the wind speed increases by more than 0.15m/s,which can significantly improve the PET and reduce the comfort.When the relative humidity is within a certain range,the increase of the humidity and the wind speed will not change the PET.The water can regulate the temperature,relative humidity and wind speed in the surrounding space to varying degrees.The water in the experiment is still water surface,cooling and humidifying in winter and summer,and increasing wind speed.Among them,the area of water is the main factor affecting the regulation effect of water,and different locations at the water edge have different effects.Water can effectively reduce the ambient temperature and increase the relative humidity and wind speed in summer,but because of the formation of thermal ventilation,the temperature has decreased,and the PET value may increase;the combination of water-facing space and plant or building shading can significantly reduce the PET,while the whole day shaded space is the opposite.The Pavilion and corridor buildings and walls mainly influence the climate of the garden by shading,guiding and blocking the airflow.Because Pavilion and corridor buildings and walls can reduce solar radiation,but Pavilion and corridor space will not hinder air circulation and reduce wind speed while providing shade,so the thermal comfort of space under Pavilion and corridor in summer is better than that of space enclosed by buildings and walls,contrary to that in winter.Complex vegetation structure can make the space have better shading effect when the sun is at different altitudes.Shading is similar.When the temperature is high,the thermal comfort of the plant-rich space is better than that of the plant-sparse waterfront space.Therefore,the thermal comfort in summer can be improved by properly increasing the ratio of plants to water.