建筑物人为热释放对城市边界层影响的机理研究-以夏季为例

With the rapid development of urbanization and improving international standing in China, there will be more and more international events and conferences. Demand for fine weather service is continuously improving in urban areas of China. However, the current urban prediction model is lack of the ability of simulating the latent heat flux. That induces the energy balance of urban boundary layer is destroyed in the model and overestimates temperature, underestimates humidity and further leads to poor performance for synoptic situation and extreme event. The main task of this project is to add the latent heat flux released by air condition and its feedback effects with external atmosphere to the building energy model in order to solving the problem that underestimating the latent heat flux in the urban area and improving the model performance of temperature and humidity. We use improved model to study the impact mechanism of anthropogenic heat release on environment. And quantitative analysis impact feature of anthropogenic heat release on temperature, humidity and boundary layer structure.

随着我国城市化进程的迅猛发展以及国际地位的不断提高，将承办越来越多的国际重大赛事和会议，使得中国城市地区对精细化气象服务的需求不断提高。而现有的精细化预报模式对于城区潜热通量的模拟能力严重不足，导致在模式中城市边界层的能量平衡被破坏，造成温度模拟偏高，湿度模拟偏低，进一步引起模式对天气过程，特别是极端天气事件的模拟效果较差。本项目的主要任务是在建筑物能量模型中加入空调系统排放的潜热通量及其与外部大气的反馈作用，以改进模式对城区潜热模拟偏低的问题，从而提高区域模式对城市地区能量平衡的模拟能力。并利用改进的模式研究人为热释放对于城市环境的影响机理，并定量的分析人为热释放对边界层温度，湿度以及边界层结构的影响特征。

现有的精细化预报模式对于城区潜热通量的模拟能力严重不足，导致在模式中城市边界层的能量平衡被破坏，造成温度模拟偏高，湿度模拟偏低，进一步引起模式对天气过程，特别是极端天气事件的模拟效果较差。本项目在建筑物能量模型中加入空调系统排放的潜热通量及其与外部大气的反馈作用，以改进模式对城区潜热模拟偏低的问题，从而提高区域模式对城市地区能量平衡的模拟能力。评估改进后的区域模式，结果显示空调冷却塔模型对模式地表热通量的改进效果明显，进而改进模式对温度和湿度的模拟性能。进一步利用改进的模式，研究人为热释放对于城市环境的影响机理，并定量的分析人为热释放对边界层温度，湿度以及边界层结构的影响特征。