A Feasibility Study on Open Cooling

开放式冷却的可行性研究

• 批准号: 61550422
• 负责人: ENAI Masamichi
• 金额: $ 1.34万
• 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: 1986
• 资助国家: 日本
• 起止时间: 1986 至 1987
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-61550422/
• 关键词: Open Cooling; Neutral axis; Inflow Depth; Exchanged Ventilation; 上方開放熱対流換気; 1室3温非定常数値解析; 可視化; レーザー光源; トレーサーパーティクル; 上方開放; 冷気滞溜; 床冷房

Most cooling equipment has been designed assuming that a building is a closed system. Even if it is cooled, the distribution of air temperature will be affected by the remnant heat of people, lighting etc and the warm zone will always appear at the ceiling level. When warm air at the ceiling level is exhausted smoothly through high side opening by buoyant ventilation and cool zone is not spoiled by its circulation, not only the thermal environment will be improved but also the cooling load will be reduced. Rcently, floor heating systems are being used in office buildings. That system can also provide floor cooling by circulating cool water. Similarly the thermal storage of an earth floor can be used to increase comfort at floor level in summer.In this report, the feasibility of open cooling will be examined in such a building. And the authors will examine the state of non-diffusible warm air exhaust, and the inflow-depth of fresh air through openings in a model. We observed the air cir … More culation visually with the aid of a laser. The tracer particles used were magnesium-carbonate dust. In the numerical analysis by using the successive integration method, we tried to divide a room into three parts (upper, middle and lower), and to discuss the characteristics of its therma environment which had an inhomogeneous distribution of temperature.The conclusion is as follows.1) When using the scanning galvano-meter and rotating its shaft for the purpose of observing visually slow air flow, a high illumination screen is obtained when operating a laser system.2) When the high side opening is opened, the cool fresh air does not exceed the neutral axis and also it does not disturb the cool stagnation at floor level. In that case, warm air non-diffusely exhausted. The height of the neutral axis becomes lower as the outdoor temperature grows lower, consequently, it is possible to cool naturally at night.3) The indoor thermal environment when using floor cooling can be improved by opening the high side opening. It is useful to open the high side opening for lowering the air temperature at the ceiling level in the daytime as well as in the night when the outdoor temperature drops. Less

大多数冷却设备的设计都假设建筑物是一个封闭的系统。即使在冷却的情况下，室内空气温度的分布也会受到人的余热、照明等的影响，暖区始终出现在天花板上。当顶棚高度的热空气通过浮力通风从高处开口顺利排出，而冷区不受其循环的破坏时，不仅可以改善热环境，而且可以降低冷负荷。最近，地板供暖系统被用于办公楼。该系统还可以通过循环冷却水提供地板冷却。同样地，在夏季，可以利用地面的蓄热来增加地面的舒适度。在本报告中，将研究在这种建筑物中进行开放式冷却的可行性。并对非扩散性热空气的排出状态和新鲜空气通过模型开孔的流入深度进行了研究。我们观察了空气循环 ...更多信息 在激光的帮助下进行视觉计算。使用的示踪粒子是碳酸镁粉尘。在用逐次积分法进行数值分析时，我们试图将一个房间分成三部分（上、中、下），并讨论了其温度分布不均匀的热环境特点，得出如下结论：1）当使用扫描电流计并旋转其轴以观察视觉上的缓慢气流时，当操作激光系统时，获得高照明度的屏幕。2）当高侧开口打开时，冷的新鲜空气不超过中性轴，并且也不干扰地板水平处的冷停滞。在这种情况下，热空气不扩散地排出。室外温度越低，中性轴的高度越低，因此，夜间可以自然冷却。3）通过打开高位开口，可以改善使用地板冷却时的室内热环境。在白天和室外温度下降的夜晚，打开高侧开口以降低天花板水平处的空气温度是有用的。少

项目成果

M. KONO, M. ENAI: "A Study on Thermal Characteristics of Model Space with High Side Openings" Transactions of Hokkaido Branch, Architectural Institute of Japan. 60. 17-20 (1987)

M. KONO，M. ENAI：“高侧开口模型空间的热特性研究”日本建筑学会北海道分会学报。

M. ENAI, N. HASIMOTO: "A Feasibility Study on Open Cooling part-2 results of numerical analysis" Transactions of Hokkaido Branch, the Society of Air Conditioning and Sanitary Engineers of Japan. 21. 15-18 (1987)

M. ENAI、N. HASIMOTO：“开放式冷却可行性研究第 2 部分数值分析结果”，日本空调与卫生工程师协会北海道分会汇刊。

河野光治,絵内正道,久保田克巳,荒谷登: 日本建築学会北海道支部研究報告集. 60. 17-20 (1987)

河野光晴、口内正道、久保田胜美、荒谷登：日本建筑学会北海道分会研究报告 60. 17-20 (1987)

河野,絵内: 日本建築学会北海道支部研究報告集(計画). 60. (1987)

河野内内：日本建筑学会北海道分会研究报告（规划）60。（1987）。

絵内正道,内藤仁志: 空気調和衛生工学会北海道支部論文集. 22. (1988)

Masamichi Euchi、Hitoshi Naito：日本空调和卫生工程师协会北海道分会论文集 22。（1988 年）