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Simulation of Radiant Cooling Systems in Cleanroom Applications Using Computational Fluid Dynamics 洁净室辐射冷却系统的计算流体力学模拟
近年来,辐射冷却技术得到了迅速发展,因为它们能够提供无气流且热均匀的环境。在一些洁净室应用中,如医院和测量实验室,需要这些特定条件。本研究利用计算流体力学(CFD)对质量测量实验室提出的对流和/或辐射冷却系统进行了研究。本研究的实验室位于埃及开罗马里奥蒂亚区的国家标准研究所。为了避免影响测量装置的灵敏度和测量过程本身的完整性,需要在无气流条件下实现均匀的温度分布。CFD工作使用商业软件PHOENICS进行,该软件使用HVAC应用模块FLAIR(CHAM Corporation 2008)。结果表明,与传统的对流暖通空调技术相比,辐射冷却技术能够产生更动态、更热稳定和更舒适的环境。 辐射冷却是一种理想的解决方案,它可以在尽可能少的空气流动的情况下实现热排出,因为空气循环仅由密度差产生的浮力引起。引文:2018年冬季会议,伊利诺伊州芝加哥,技术论文
Radiant cooling techniques have rapidly developed in recent years because of their capability to provide a draft-free and thermally homogeneous environment. These specific conditions are required in some cleanroom applications such as hospitals and measurement laboratories. The current study investigates a proposed convective and/or radiant cooling system for a mass measurement laboratory using computational fluid dynamics (CFD). The laboratory in this study is in the National Institute of Standards, located in the Mariottia District, Cairo, Egypt. A uniform temperature distribution with draft-free conditions is required to avoid affecting the sensitivity of the measurement devices and the integrity of the measurement process itself. The CFD work is conducted using a commercial software, PHOENICS, which uses the HVAC applications module FLAIR (CHAM Corporation 2008). The results show that radiant cooling techniques are capable of producing more dynamically and thermally stable and comfortable conditions compared to conventional convection HVAC techniques. Radiant cooling is an ideal solution that achieves thermal heat removal with the least possible air movement, as air circulation is caused only by buoyancy forces resulting from density differences.
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