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Measuring Ventilation Rate Through Naturally Ventilated Air Openings By introducing Heat Flux

机译：通过引入热通量来测量自然通风的通风口的通风率

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Existing ventilation rate measuring techniques for natural ventilation do not provide an online quantification of ventilation rate through the building envelope. Therefore, a need for a practical, robust, and cheap direct measuring technique is obvious. This study investigates the possibility of using a heat source to trace ventilation rate through an air inlet/outlet. A rectangular heat source was introduced in the middle of the air inlet with a known ventilation rate, and afterwards, the 2D temperature field in the flow direction was recorded using an infrared camera. 2D temperature data obtained at different ventilation rates were used to design a sensor composed of 10 thermocouples attached to a circle or ellipse frame around a heat source. Maximum and average temperatures from these sensors were used to estimate the ventilation rate. If adequate heat was applied, it was possible to estimate the ventilation rate with 15% inaccuracy using temperature information from the arc.
机译：现有的用于自然通风的通风率测量技术无法在线量化建筑物围护结构的通风率。因此，显然需要实用，鲁棒且便宜的直接测量技术。这项研究调查了使用热源跟踪空气入口/出口通风速率的可能性。将矩形热源以已知的通风率引入进气口的中间，然后，使用红外热像仪记录流动方向的二维温度场。在不同通风速率下获得的2D温度数据用于设计由10个热电偶组成的传感器，这些热电偶连接到围绕热源的圆形或椭圆形框架上。这些传感器的最高和平均温度用于估算通风率。如果施加足够的热量，则可以利用电弧的温度信息估算出通风率，其误差为15％。

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