置换通风空调房间室内空气品质研究

本文选用一应用置换通风方式的典型办公室房间作为研究对象，应用数值模拟方法，从室内空气温度分布、速度场、PMV-PPD及空气龄几方面模拟研究了置换通风条件下室内空气品质。结果表明置换通风方式下空调房间具有较好的热舒适环境和良好的室内空气品质。     

空调环境建筑室内空气品质与暖通空调相互关系分析

叙述了引起建筑物空调环境的室内空气品质问题的原因，讨论了暖通空调系统对于取得良好室内空气品质的作用，并且对室内空气品质与暖通空调系统之间的相互关系进行了分析     

我国室内空气质量与评价方法研究进展

当前我国室内空气污染十分严重，只有通过室内空气质量评价才能够了解室内环境污染水平和对健康的可能影响，并针对性地提出控制措施。本文介绍了室内空气质量和室内空气污染的定义、由来、研究对象以及相关内容，综合分析了室内空气质量的影响因素，并比较了我国与国外室内环境研究的状况、IAQ标准、IAQ评价指标研究的进展情况，同时提出了我国IAQ对策。     

室内空气生物污染及其防治措施

综合分析了产生病态建筑(SBS)的主要原因之一:室内空气生物污染.对其种类、来源、对人类健康的影响机理,以及防治措施作了阐述,评价了现行措施的优劣,并介绍了目前室内生物污染的研究动态.     

室内空气品质的若干问题探讨及模糊评判

概述了室内空气品质问题的起因,分析了室内空气品质的影响因素和改善措施,根据室内空气品质评价的不确定性和连续性;应用模糊数学理论对室内空气品质进行评判,并建立了数学模型进行分析.     

室内空气净化器的现状及改进措施

现有室内空气净化器产品的净化功能尚不完善,对挥发性有机物缺乏高效实用的处理方法,无法满足改善室内空气品质的需要,在分析室内空气污染物性质及特点的基础上,将活性炭一纳米TiO2光催化氧化技术与传统的空气过滤技术相结合,提出了室内空气净化器的改进措施及新型室内空气净化器的设计方案,以期推动这一产品的升级换代。     

Indoor air pollutant health prioritization in office buildings

This work presents an original method to identify priority indoor air pollutants in office buildings. It uses both a chronic risk assessment approach by calculating a hazard quotient, and a hazard classification method based on carcinogenic, mutagenic, reprotoxic, and endocrine disruptive effects. A graphical representation of the results provides a comprehensive and concise visualization of all of the information, including the number of buildings where each substance was measured, an indicator of exposure data robustness. Seventy-one out of 342 substances (20%) for which indoor air concentrations have already been measured in office buildings were identified as priority pollutants. The results were compared to previous prioritization studies in various types of indoor environments to assess the reliability of the method and highlight its advantages. Sensitivity analyses were performed to reduce the geographical scope (OECD countries only), time scope (after 2010 only), and measurement duration (working hours only) and showed little influence on the results. Finally, 123 additional substances that could be present in office indoor air but could not be assessed due to the lack of measurement data are proposed for future monitoring surveys to update the prioritization of indoor air pollutants in offices.     

Comparison of disinfection performance of UVC-LED and conventional upper-room UVGI systems

We developed a novel, compact upper-room ultraviolet germicidal irradiation system with light-emitting diode sources (UR-UVGI-LED) to enhance the disinfection of bioaerosols in an enclosed room space. Its effectiveness was evaluated and compared with the conventional upper-room ultraviolet germicidal irradiation system with mercury vapor sources (UR-UVGI-MV). Escherichia coli, Serratia marcescens, and Staphylococcus epidermidis were atomized under the well-mixed condition and exposed to UR-UVGI-LED (or UR-UVGI-MV) device. The intensity output of the UR-UVGI-LED was also varied from 0% (no LED), 25%, 50% to 100% to further evaluate the UR-UVGI-LED disinfection effectiveness under different power levels. The decay rates for UR-UVGI-LED ranged from −0.1420 ± 0.04 min⁻¹ to −0.3331 ± 0.07 min⁻¹ for Escherichia coli, −0.1288 ± 0.01 min⁻¹ to −0.3583 ± 0.02 min⁻¹ for Serratia marcescens, and −0.0330 ± 0.01 min⁻¹ to −0.0487 ± 0.01 min⁻¹ for Staphylococcus epidermidis. It was noticed that the intensity level had a non-linear influence on the UR-UVGI-LED’s performance. The decay rates achieved by the UR-UVGI-MV system were −0.3867 ± 0.08 min⁻¹, −0.4745 ± 0.002 min⁻¹, and −0.1624 ± 0.02 min⁻¹ for Escherichia coli, Serratia marcescens, and Staphylococcus epidermidis, respectively. Hence, the disinfection performance of both UR-UVGI-LED and UR-UVGI-MV systems was comparable for Escherichia coli and Serratia marcescens. These results demonstrate that the UR-UVGI-LED system has a high potential to be used as a safe and effective irradiated light source to disinfect indoor airborne pathogens.     

置换通风的应用及研究进展

本文介绍和综述国外有关置换通风的研究进展,影响置换通风热舒适性和室内空气品质的因素,以及人员活动和热源分布等对置换通风气流组织的影响。     

CFD analysis of ventilation effectiveness in a public transport interchange

A study was conducted into the ventilation effectiveness of a ventilation system within a public transport interchange (PTI) in Hong Kong. A computational fluid dynamics (CFD), steady state computational model of the PTI was used to investigate and predict the typical pollutant emission pattern for buses. In Hong Kong, the displacement ventilation (DV) scheme is often employed for the PTI. The numerical simulation investigates the effectiveness of the DV system in removing pollutants from the occupied zone. An alternative model is proposed where the supply is located at the ceiling and the exhausts are located at the lower part of the columns. It was found that both systems could adequately ventilate the PTI; however, the ceiling based air supply system is able to provide improved thermal comfort and indoor air quality (IAQ).