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Numerical investigation of height impact of local exhaust combined with an office work station on energy saving and indoor environment

机译：局部排气与办公室工作站组合对节能和室内环境影响的数值研究

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摘要

A healthy and comfortable working environment is very important for improving its occupants' productivity. In this study, the evaluation of the height impact for the proposed local exhaust ventilation system on the indoor thermal comfort, inhaled air quality and energy savings was explored numerically. In the proposed system, the exhaust opening was combined with the office workstation in a single unit. The intention was to help extract the warmed and contaminated air locally before it disperses across the room. The performance of the new system at three different heights of the combined system (1.4 m, 1.6 m and 2.0 m) above floor level was investigated numerically with a validated CFD model in a room with and without inclusion of the novel local exhaust ventilation system. The performance of using this system was evaluated using the main evaluation indices for any ventilation system such as energy saving, occupant thermal comfort, draught risk and the quality of the indoor air. The results showed that by selecting a suitable height for the combined system, a significant improvement on energy savings (up to 22.56%) and inhaled air quality can be realised with an acceptable level of the indoor thermal comfort. It was found that in comparison to cases 2 (1.4 m) and 4 (2.0 m), case 3 (1.6 m) was considered to be the best height at which optimal performance could be achieved from the LEVO system. (C) 2017 Elsevier Ltd. All rights reserved.
机译：健康舒适的工作环境对于提高乘员的生产率非常重要。在这项研究中，数值研究了拟议的局部排气通风系统的高度对室内热舒适性，吸入空气质量和节能的影响。在建议的系统中，排气口与办公室工作站合并在一个单元中。目的是帮助在空气散布到整个房间之前将局部受热和污染的空气抽走。使用经过验证的CFD模型，在有或没有包含新型局部排气通风系统的房间内，对复合系统在高于地面的三个不同高度（1.4 m，1.6 m和2.0 m）的三个不同高度处的性能进行了数值研究。使用该系统的性能通过对任何通风系统的主要评估指标进行评估，例如节能，乘员热舒适性，吃水风险和室内空气质量。结果表明，通过为组合系统选择合适的高度，可以在可接受的室内热舒适水平下实现节能（高达22.56％）和吸入空气质量的显着改善。发现与案例2（1.4 m）和案例4（2.0 m）相比，案例3（1.6 m）被认为是可以从LEVO系统获得最佳性能的最佳高度。 （C）2017 Elsevier Ltd.保留所有权利。

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