植被传热机理及其改善城市热环境效果分析  

Theoretical Study of the Heat Transfer Model and Mitigation Effect of Foliage

作　　者：姜纬驰[1] 高乃平[1] 贺启滨 李雨桐 

机构地区：[1]同济大学机械工程学院,上海201804 [2]深圳市建筑科学研究院股份有限公司,广东深圳518049

出　　处：《建筑科学》2015年第2期46-53,共8页Building Science

基　　金："十二五"国家科技支撑计划课题"绿色建筑规划预评估与诊断技术研究"(2012BAJ09B01)

摘　　要：通过对植被传热机理的分析,建立了稳态及非稳态植被传热模型,并通过同济大学嘉定校区的现场实测数据验证了该数学模型的正确性,认为该模型可准确计算稳态和非稳态条件下植被表面和其下方土壤表面的温度。在此基础上,利用该模型计算不同气候区叶片表面温度,发现植被降温效果受当地气候条件影响。对上海地区夏季连续2 d的计算结果表明,植被表面温度受太阳辐射和蒸腾作用影响最大,植被平均温度比空气温度低1.8℃,比裸露地面温度低5.9℃,植被可有效改善室外热环境。A mathematical foliage heat transfer model is established through specific heat transfer mechanism analysis in this paper. The foliage surface temperature and soil temperature calculated from the present model fit well with the experimental results conducted in Jiading Campus, Tongji University. Comparison of the foliage surface temperatures in different cities proves that foliage temperature is greatly affected by 1℃ al meteorological parameters. According to the transient heat transfer model, the simulation results of two consecutive summer days in Shanghai show that the foliage surface temperature is greatly impacted by the solar radiation intensity and evapotranspiration. The average foliage surface temperature is 1.8 ℃ lower than air temperature and 5.9 ℃ lower than bare ground temperature. It proves that foliage is effective in improving outdoor thermal environment and mitigating heat island effect.

关 键 词：植被 传热模型 热岛效应 降温 

分 类 号：TK529[动力工程及工程热物理—热能工程]