Feasibility Study on Natural Cooling of Atrium in Cold region

1. 夏季光井中庭的热环境本文测量了鲁莫伊市政府大楼中庭空间和石kari市一个市政厅中庭空间的温度分布。在夏季，当紧急火灾的排风窗打开时，玻璃屋顶天花板处的热空气被排出，室外的凉爽空气流入中庭空间。在夏季，利用室外空气在天花板上打开排风窗，有利于自然降温。计算温度垂直分布的数值分析[j]。Tokari提出了中庭等大空间内温度垂直分布的数值分析方法。对Tokari方法的盒子模型进行了改进，适用于玻璃窗和实心墙混合的垂直平面。它能够计算出由玻璃和实心墙组成的垂直平面完成的中庭的温度分布。对流引起自然通风的相似律提出了自然通风的近似相似律，并采用示踪气体法测量了小模型和大模型的通风量。两种模型的减速比为1:4。相似法就是在这种情况下得到证实的。

1. Thermal Environment of Light-well Atrium in the SummerThe temperature distributions were measured in the atrium space of the Government Building in Rumoi and in one of the City Hall in Ishikari. When the exhaust windows for a fire emergency were opened in the summer, the warm air at the ceiling level of glass roof was exhausted and the cool outdoor air was flowed into the atrium spaces. It is useful for the natural cooling by using the outdoor air to open the exhaust windows at the ceiling level in the summer.2. Numerical Analysis to Calculate the Vertical Temperature DistributionDr.Tokari proposed the numerical analysis method for the vertical temperature distribution in a large space like an atrium. The box model of Tokari's method was improved for a vertical plane mixed of glass window and of solid wall. It is able to calculate the temperature distribution in an atrium completed with a vertical plane mixed of glass and solid wall.3. Similarity Law for Natural Ventilation Caused by ConvectionAn approximate similarity law for natural ventilation was proposed, and amount of ventilation in a small model and a large model were measured by the tracer gas method. The reduce ratio of two models was 1 : 4. The similarity law was certified in such a situation.