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Study on the thermal design of breezing path with leading the cool air which ooze out from tree shaded areas

引导树荫处渗出冷气的导风道热设计研究

基本信息

批准号：
06650649
负责人：
ISHIDA Hideaki
金额：
$ 1.22万
依托单位：
Hokkaido University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1995
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06650649/
关键词：
Micro area climate Air temperature distribution Humidity distribution Radio-temperature Air flow Tree Pond Lawn 爽やかさ

项目摘要

There are large differences of air temperature between the south and north sides of trees and the sunny and shade portions of a street lined with trees. It seems that the differences cause specific air currents and provide a comforting effect on the outdoor conditions. However, it is difficult to precisely locate and define the areas and characteristics of outdoor micro area climates because of wide variations and disorder.Distributions of outdoor air temperature and humidity are measured by air intake type sensors. That move automatically or manually bakc and forth in the observations area. From the average pattern of distributions, some basic characteristics of outdoor micro area climate are discernible.From the measurement of outdoor micro area climate, we found that tree create gentle air currents by releasing the heated and dumped air naturally due to it's natural controlling of its own temperature by transpiration. Moreover, shading from solar radiation has a significant effect of keeping ground cool. Furthermore, it causes cool air current under space of the green shades.Also clarified that there are large difference of air temperature between sunny and shade portions of tree planed areas. That difference is almost equal to the difference between urban and suburban temperatures. Taking a walk, such change of thermal environment offers a refreshing circumstances.

树木的南侧和北侧以及街道两侧树木的阳面和阴面之间的气温差异很大。这种差异似乎造成了特定的气流，并为室外环境提供了舒适的效果。然而，由于室外微区气候变化大、无序，难以精确定位和定义其区域和特征。室外空气温度和湿度的分布由进气式传感器测量。在观测区域内自动或手动来回移动。从分布的平均格局可以看出室外微区气候的一些基本特征。通过对室外微区气候的测量，我们发现，由于树木通过蒸腾作用自然控制自身温度，因此树木通过自然释放加热和倾倒的空气来产生温和的气流。此外，太阳辐射的遮阳对保持地面凉爽有显著的作用。此外，它在绿色阴影的空间下引起冷空气流动。同时也澄清了树木种植区阳光和阴影部分的气温差异很大。这种差异几乎等于城市和郊区之间的温度差异。散步，这种热环境的变化提供了一个清爽的环境。