国产综合在线观看视频,国产精品原创视频,亚洲国产熟亚洲女视频,一级风流片a级国产

關(guān)鍵詞: 建筑節能, 氣象參數, 氣候變化, 華北, building energy efficiency, meteorological parameters, climate change, North China

Abstract: Building energy efficiency is an important measure to deal with climate change issue, and meteorological parameters are the basis for building energy-saving design. In this study, meteorological parameters for building energy-saving design in four cities (Beijing, Tianjin, Shijiazhuang, and Taiyuan) in North China during 1951-2010 were analyzed to provide reference for building energy efficiency. The results showed that outdoor design temperature for heating or air-conditioning in winter apparently increased in all four cities in recent sixty years. Outdoor design dry bulb temperature for summer air-conditioning showed an increasing trend in these four cities and air-conditioning outdoor daily average and hourly temperature in summer also gradually increased. However, the increasing rate was lower in summer than in winter. Outdoor design temperature for summer ventilation showed a weak increase trend in four cities, whereas outdoor design relative humidity showed a decrease in Beijing, Tianjin and no obvious trend in Shijiazhuang and Taiyuan. The results in this study suggest that climate change has evident effect on meteorological parameters for building energy-saving design, and this effect is more intense in winter than in summer, which may be beneficial for building energy-saving design. The weak increase in outdoor design temperature for summer ventilation may be of no evident effect on building ventilation energy, whereas the decrease of relative humidity is useful for energy saving in Tianjin and Beijing.