CFD study on the transmission of indoor pollutants under personalized ventilation

As an advanced and efficient ventilation method, personalized ventilation (PV) has attracted more and more attentions. This paper investigates the pollutant transmission characteristics and personal exposure under the combination of two types of PV terminals and three kinds of typical background ventilation systems in an office with four work stations. Three kinds of cases are simulated and analyzed, including the most unfavorable condition, the most favorable condition and the ordinary condition. The results show that the interactions between PV and displacement ventilation (DV) or PV and under-floor air distribution (UFAD) are obviously stronger than that between PV and mixed ventilation (MV). Under a constant total ventilation rate, PV with a high flow rate may disrupt the characteristics of the background ventilation system and increase the personal exposure if comparing with the background ventilation alone. The advantage of PV depends on the proper combination of PV and its background ventilation system. Crown Copyright (C) 2013 Published by Elsevier Ltd. All rights reserved.

作为一种先进高效的通风方式，个性化通风（PV）受到了越来越多的关注。本文研究了在一个有四个工位的办公室中，两种个性化通风末端与三种典型背景通风系统组合下的污染物传播特性和人员暴露情况。对三种情况进行了模拟分析，包括最不利条件、最有利条件和普通条件。结果表明，个性化通风与置换通风（DV）或个性化通风与地板下送风（UFAD）之间的相互作用明显强于个性化通风与混合通风（MV）之间的相互作用。在总通风量恒定的情况下，与单独的背景通风相比，高流量的个性化通风可能会破坏背景通风系统的特性并增加人员暴露。个性化通风的优势取决于个性化通风与其背景通风系统的合理组合。版权归英国皇家所有（C）2013，由爱思唯尔有限公司出版。保留所有权利。