Ventilation is essential for the health and safety of workers in industrial buildings, as it can reduce the exposure to hazardous substances. This study used an experimental chamber with strong thermal buoyancy to measure the air velocity and pollutant concentration under two types of exhaust hoods: reinforced and traditional. The data-driven turbulence model with a new wall function was validated by comparing the simulated results with the measured data. Next, different ventilation strategies were evaluated in a small room. The reinforced exhaust ventilation had the best performance, but it also created vortices due to the impinging flow, which trapped pollutants. To solve this problem, an improved reinforced exhaust hood with multiple independent inlets was designed. Through adjustment of the velocities of these inlets, the vortices caused by wall impingement flow were minimized, resulting in a 77% decrease in pollutant concentration. For a large room, the study optimized the jet collision velocity when multiple reinforced exhaust hoods operated together. The reinforced exhaust ventilation system reduced the pollutant concentration in the breathing zone to 89% of the concentration under existing ventilation. Moreover, the improved reinforced exhaust hood provided a significant energy saving. In small and large industrial buildings, the hood reduced fan energy consumption by more than 80% and air conditioning energy consumption by more than 60%.

中文翻译：

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具有强热浮力的工业建筑节能排烟罩

通风对于工业建筑工人的健康和安全至关重要，因为它可以减少接触有害物质。本研究使用具有强热浮力的实验室来测量增强型和传统型两种排风罩下的空气流速和污染物浓度。通过将模拟结果与测量数据进行比较，验证了具有新壁函数的数据驱动的湍流模型。接下来，在一个小房间中评估不同的通风策略。强化排气通风的性能最好，但它也会因冲击流而产生涡流，从而截留污染物。为了解决这个问题，设计了一种具有多个独立进风口的改进型加强型排烟罩。通过调节这些入口的速度，将壁面冲击流引起的涡流降至最低，污染物浓度降低了77%。对于大房间，该研究优化了多个强化排气罩一起运行时的射流碰撞速度。强化排风系统将呼吸区污染物浓度降低至现有通风条件下浓度的89%。此外，改进的强化排气罩可显着节省能源。在小型和大型工业建筑中，油烟机可减少风扇能耗80%以上，空调能耗减少60%以上。