Test on the impact of urban underground on summer microclimate [城市下垫面对夏季微气候影响的测试研究]

作者：Liu D.; Ma L.; Liu J.

来源：Journal of Xi'an University of Architecture & Technology, 2020, 52(1): 107-112.

DOI：10.15986/j.1006-7930.2020.01.015

• Microclimate
• Physical property
• Thermal comfort
• Thermal environment
• Underlying surface

The underlying surface is a key factor in the formation of microclimates. In order to study its effect on the microclimate in summer, four representative urban underlying surfaces (asphalt pavement, concrete pavement, pavement brick floor and grassland) were selected as objects for observation. The thermal environment parameters of the underlying surface were measured by measuring instruments. On this basis, the microclimate characteristics surface temperature variation characteristics of different underlying surfaces are analyzed; so are the relationship between surface temperature and meteorological parameters, physical properties of underlying surfaces. The micro-thermal environmental impacts of different underlying surfaces are compared and studied. Results are as follows:There are differences in the microclimatic environment of the underlying surface composed of air temperature, solar radiation, relative humidity and wind speed above the surface of different underlying surfaces. The diurnal variation of surface temperature of different underlying surfaces generally presents a single peak pattern, which rises first and then decreases. The surface temperature of asphalt is higher than that of other underlying surfaces in the whole day.Temperature, solar radiation and air relative humidity have significant effects on the temperature of underlying surface. The thermal physical properties of materials can affect the surface temperature performance of underlying surface, but the degree of influence is different. From high to low, the order is thermal diffusivity, specific heat capacity and reflectivity; The thermal environment comfort degree of the four kinds of underlying surfaces from high to low is grassland, concrete, paving brick and asphalt in turn. Research results have certain reference significance for understanding the thermal environment of different urban underlying surfaces, and can provide scientific basis for alleviating the urban thermal environment. ? 2020, Editorial Office of Journal of Xi'an University of Architecture & Technology. All right reserved.

• 单位
  华南理工大学