Department of Building Physics, Bauhaus-Universität Weimar, Weimar, Germany.
Indoor Air. 2020 Jul;30(4):776-789. doi: 10.1111/ina.12672. Epub 2020 Apr 19.
The performance of ductless personalized ventilation (DPV) was compared to the performance of a typical desk fan since they are both stand-alone systems that allow the users to personalize their indoor environment. The two systems were evaluated using a validated computational fluid dynamics (CFD) model of an office room occupied by two users. To investigate the impact of DPV and the fan on the inhaled air quality, two types of contamination sources were modeled in the domain: an active source and a passive source. Additionally, the influence of the compared systems on thermal comfort was assessed using the coupling of CFD with the comfort model developed by the University of California, Berkeley (UCB model). Results indicated that DPV performed generally better than the desk fan. It provided better thermal comfort and showed a superior performance in removing the exhaled contaminants. However, the desk fan performed better in removing the contaminants emitted from a passive source near the floor level. This indicates that the performance of DPV and desk fans depends highly on the location of the contamination source. Moreover, the simulations showed that both systems increased the spread of exhaled contamination when used by the source occupant.
由于无管道个人通风（DPV）和典型台式风扇都是允许用户个性化其室内环境的独立系统，因此将它们的性能进行了比较。使用经过验证的办公室占用者的计算流体动力学（CFD）模型对两个系统进行了评估。为了研究 DPV 和风扇对吸入空气质量的影响，在域中对两种类型的污染源进行了建模：有源源和无源源。此外，还通过将 CFD 与加利福尼亚大学伯克利分校（UCB 模型）开发的舒适度模型进行耦合来评估比较系统对热舒适度的影响。结果表明，DPV 的性能通常优于台式风扇。它提供了更好的热舒适度，并在去除呼出污染物方面表现出更好的性能。但是，台式风扇在去除靠近地板水平的无源源发出的污染物方面表现更好。这表明 DPV 和台式风扇的性能高度取决于污染源的位置。此外，模拟表明，当污染源使用者使用这两个系统时，都会增加呼出污染的扩散。
