Cooling System in Indoor Open Spaces by Using Cool Runing Water Surface

利用冷流水表面的室内开放空间冷却系统

• 批准号: 12450230
• 负责人: ENAI Masamichi
• 金额: $ 10.56万
• 依托单位: HOKKAIDO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12450230/
• 关键词: Cool running water; Evaporation; Condensation; Heat Transfer Coefficient; Substance transfer coefficient; Particle image velocimetory; 冷却流下水面; 光幕

1) Improvement Effects of Thermal Environment by Using Cool Running WaterThe underground spaces as the test space were selected. The reason is that we can see a lot of waterside in such spaces. The effect by controlling water temperature in watersides was evaluated from the results by numerical analysis.(1) The water circulation system and the air circulation system can be combined by using cool running water system. (2) Heat and Substance balance can be modeled on the runing water. (3) The relative humidity decrease 5% in the daytime if controlled water temperature. (4) The thermal load in the morning can be reduced by using cool runing water.2) Airflow Distributions around the Watersides such as Model ExperimentThe temperature and airflow distributions were measured in the actual-sized models. After that, heat and substance transfer coefficient were estimated.(1) The characteeristics of waterfall surface temperature were measured by using the camera that can indicate radiation temperature. (2) We recognized the distribution of vapor pressure at the basin of waterfall. (3) The turbulent intensity around the edge was stronger than that of inner part.

1)利用自来水改善室内热环境的效果选择地下空间作为试验空间。原因是我们可以在这样的空间里看到很多水边。通过数值分析的结果，评价了控制水体温度的效果。(1)水循环系统和空气循环系统可以通过使用冷自来水系统组合。(2)热量和物质平衡可以在流水上模拟。(3)控制水温，白天相对湿度下降5%。(4)采用冷自来水可以降低早晨的热负荷。2）模型试验等水边气流分布在实际尺寸的模型中测量了温度和气流分布。在此基础上，计算了传热系数和传质系数。(1)利用辐射测温摄像机测量了瀑布表面温度的特征。(2)我们认识到了瀑布盆地的蒸汽压分布。(3)边缘附近的湍流强度大于内部。