A Feasibility Study on Open Cooling

大多数冷却设备的设计都假定建筑物是一个封闭系统。即使降温，空气温度的分布也会受到人、照明等余热的影响，暖区始终会出现在天花板水平。当天花板水平的暖空气通过浮力通风通过高侧开口顺利排出，冷区不被其循环破坏时，不仅改善了热环境，而且降低了冷负荷。最近，地板供暖系统正在办公楼中使用。该系统还可以通过循环冷却水来提供地板冷却。同样地，地面的储热可以在夏天增加地板的舒适性。在这份报告中，将在这样的建筑中研究开放式降温的可行性。作者将在模型中检查非扩散热空气的排气状态，以及新鲜空气通过开口的流入深度。我们观察到空气环流…在激光的帮助下，更直观地显示血液循环。使用的示踪剂颗粒是碳酸镁粉尘。在数值分析中，采用逐次积分的方法，将房间分为上、中、下三个部分，讨论了房间内温度分布不均匀的热环境特征。结论如下：1)使用扫描式电流计，旋转电流计的轴，观察缓慢的气流，在操作激光系统时，可以得到较高的照明屏。2)当高端开口打开时，凉爽的新风不会超过中性轴，也不会干扰地板上的冷停滞。在这种情况下，热空气不会扩散地耗尽。室外温度越低，中性轴高度越低，夜间自然降温成为可能。3)打开高侧开口可以改善地板供冷时的室内热环境。在白天和夜间室外温度下降时，打开高侧开口以降低天花板水平的空气温度是有用的。较少

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