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Numerical study of temperature-controlled airflow in comparison with turbulent mixing and laminar airflow for operating room ventilation

机译:与控制室通风的湍流混合和层流比较的温度控制气流的数值研究

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摘要

Operating room (OR) ventilation is crucial for reducing airborne bacteria-carrying particles (BCPs) concentration and thus preventing post-operative infections. A variety of ventilation schemes have been introduced to ORs. This study explores the effectiveness of a newly developed ventilation scheme, temperature-controlled airflow (TAF), with respect to reducing BCPs distribution and sedimentation in an OR. Comparisons are made with the conventional turbulent mixing and laminar airflow (LAF) ventilation. The study is conducted using Computational Fluid Dynamics (CFD) and Lagrangian particle tracking (LPT), with numerical models validated against literature data. The results reveal that TAF represents reliable and effective ventilation and can serve as an energy-efficient alternative to the LAF systems. The results also show that increasing ventilation rates alone will not always result in better control of BCPs distribution. Airflow patterns play an important role in removing and diluting airborne BCPs, so a specific analysis is necessary to each design of OR ventilation.
机译:手术室(OR)通风对于降低空气中携带细菌的颗粒(BCP)浓度并因此防止术后感染至关重要。手术室已引入了多种通风方案。这项研究探索了新开发的通风方案,温度控制气流(TAF)在减少OR中BCP的分布和沉积方面的有效性。与常规湍流混合和层流(LAF)通风进行了比较。该研究是使用计算流体动力学(CFD)和拉格朗日粒子跟踪(LPT)进行的,其数值模型已针对文献数据进行了验证。结果表明,TAF代表了可靠有效的通风,可以作为LAF系统的节能替代品。结果还表明,仅增加通风量并不总是能够更好地控制BCP的分布。气流模式在去除和稀释机载BCP中起着重要作用,因此对于OR通风的每种设计都必须进行具体分析。

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