Vol.19, NO.5, 2008
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Zhang Huining, Zhang Yiping, Peng Yunchuan, Zhou Yue, Peng Guifen. Thermal effects of architecture surface in Kunming and Beijing. J Appl Meteor Sci, 2008, 19(5): 573-581.
Citation: Zhang Huining, Zhang Yiping, Peng Yunchuan, Zhou Yue, Peng Guifen. Thermal effects of architecture surface in Kunming and Beijing. J Appl Meteor Sci, 2008, 19(5): 573-581.
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Thermal Effects of Architecture Surface in Kunming and Beijing

  • 1.

    Xishuangbanna Tropical Botanic Garden, Chinese Academy of Sciences, Kunming 650223

  • 2.

    Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650093

  • 3.

    School of Resources, Environments and Earth Science, Yunnan University, Kunming 650091

  • 4.

    Yunnan Professional Meteorological Observatory, Kunming 650034

  • Received Date: 2007-09-05
  • Rev Recd Date: 2008-06-10
  • Publish Date: 2008-10-31
    Abstract
  • Urban architecture and the urban heat island intensity is extremely closely related. The buildings' outside surface exhibits unique thermal energy characteristic because it absorbs the solar radiation and thermal energy from people's daily life influences buildings. The atmospheric thermal energy condition around buildings is affected inevitably, then the urban climate is affected. The observational data of buildings' external walls' surface temperature, rooftop surface temperature and the air temperature near the buildings' external surfaces in three different cities of Kunming, Beijing utilized. The vertical distribution rule of buildings' external surface temperature and air temperature near the buildings' external surfaces, the thermal effect features of the wall, and the rooftop between the nearby atmosphere are analyzed. The comparative analysis on two cities buildings thermal conditions is conducted. The following preliminary conclusions are drawn. In the same area, buildings' external walls' surface temperature and the air temperature near the buildings' external surfaces are different respectively from different directions, seasons, and heights. The influence of solar radiation on buildings' external walls surface temperature is greater than on the air temperature near the buildings' external surfaces. Generally speaking, the wall's surface is a heat source in daytime, and a heat sink at night. In different areas, there are many similarities and many differences in the thermal energy affect on buildings' external walls. The heat flux of the buildings' external walls basically is positive in daytime, is negative at night, and there is an extreme small value just before sunrise in Kunming. While in summer of Beijing, the heat flux of the buildings' external walls is basically negative in daytime and positive at night. This indicates that the influence of climate and people's activity is great to the thermal energy effect on the urban buildings' external walls in different cities. The average heat fluxes between the buildings' rooftop and its nearby air are basically positive in different areas and seasons. Buildings' rooftop displays the strong heat source effect. The thermal energy effect intensity and the solar radiation show a positive correlation. In summary, the urban building external surfaces (external wall surfaces, the surface of rooftop) are different from the ground in the urban region, and is noticeably influential thermal active surface in the formation of urban climate.
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    References(16)

  • Fig. 1  The comparison of buildings' external surface temperature in Kunming (1:January, 2:July)

    (a) east wall, (b) south wall, (c) west wall, (d) north wall

    DownLoad: Full-Size Img PowerPoint

    Fig. 2  The buildings'rooftop surface temperature, the air temperature nearby the buliding's rooftop surface and the heat flux between the buildings' rooftop and the nearby air in Kunming (1:January, 2:July)

    (a) rooftop surface temperature, (b) the air temperature nearly the rooftop surface, (c) heat flux between the rooftop and the nearby air

    DownLoad: Full-Size Img PowerPoint

    Fig. 3  The comparison of the air temperature nearby the buildings' external surfaces in Kunming (1:January, 2:July)

    (a) east wall, (b) south wall, (c) west wall, (d) north wall

    DownLoad: Full-Size Img PowerPoint

    Fig. 4  The heat flux of the building's external walls in different hight in Kunming (1:January, 2:July)

    (a) east wall, (b) south wall, (c) west wall, (d) north wall

    DownLoad: Full-Size Img PowerPoint

    Fig. 5  The comprison between the average heat flux of the building's external walls and the heat flux of the buildings's rooftop in Kunming (1:January, 2:July)

    (a) east wall, (b) south wall, (c) west wall, (d) north wall

    DownLoad: Full-Size Img PowerPoint

    Fig. 6  The buildings' external surface temperature, the air temperature nearby the building's external surface and the heat flux between the buildings' external surface and the nearby air of Beijing in July (1 is south wall, 2 is west wall)

    (a) buildins' external surface temperature, (b) the air temperature nearby the buildings' external surface, (c) heat flux buetween the buildings' external surface and the nearby air, (d) the average of heat flux

    DownLoad: Full-Size Img PowerPoint

    Table  1  The diurnal temperature range and diurnal maximum, minimum temperature of the buildings' external surface of Kunming in January and July (unit:℃)

    Table  2  The diurnal air temperature range and diurnal maximum, minimum air temperature nearby the buildings' external surface of Kunming in January and July (unit:℃)
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    • Received : 2007-09-05
    • Accepted : 2008-06-10
    • Published : 2008-10-31
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