Study on Evalution System for Air-Conditioning and Ventilation System using Ventilation Efficiency

室内通风的主要目的是尽快用新鲜空气替换被污染的空气。目前广泛使用的著名通风判据“换气量”是估算总通风量的一种非常简单实用的方法。然而，空气交换率只能解释整体通风效率，而不能代表空间中每个点的通风效率。为了设计高水平的污染控制，有必要制定新的通风效率标准。在我们的课题组中，提出了各种测量通风效率的尺度，以评估空间中每个点的通风效率分布。特别是在现场试验和比例模型试验中，对不同建筑的通风效率进行了测量。对室内空间的气流运动进行了数值模拟，并对通风效率的预测方法进行了探讨。

The major object of vetilation in a room is to replace contaminated air with fresh air as quickly as possible. The well-known ventilation criterion "air exchange rate" widely used till now is a very simple and useful measure for estimating total ventilation. However, the air exchange rate explains only overall ventilation effectiveness but does not represent the ventilation efficiency at each point in a space. In order to design high-level contamination control, it is necessary to develop new criterion ventilation efficiency. In our research group, various scales for measuring ventilation efficiency have been proposed in order to evaluate the distribution of ventilation effectiveness at each point in a space. In particular, the measurement of the ventilation efficiency of the various buildings was conducted in both the field experiment and the scale model experiment. And also numerical simulation of the airflow movement of indoor space was carried out and the prediction method of ventilation efficiency was examined.