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Can commonly-used fan-driven air cleaning technologies improve indoor air quality? A literature review

机译:常用的风扇驱动空气净化技术能否改善室内空气质量?文献综述

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Air cleaning techniques have been applied worldwide with the goal of improving indoor air quality. The effectiveness of applying these techniques varies widely, and pollutant removal efficiency is usually determined in controlled laboratory environments which may not be realized in practice. Some air cleaners are largely ineffective, and some produce harmful by-products. To summarize what is known regarding the effectiveness of fan-driven air cleaning technologies, a state-of-the-art review of the scientific literature was undertaken by a multidisciplinary panel of experts from Europe, North America, and Asia with expertise in air cleaning, aerosol science, medicine, chemistry and ventilation. The effects on health were not examined. Over 26,000 articles were identified in major literature databases; 400 were selected as being relevant based on their titles and abstracts by the first two authors, who further reduced the number of articles to 160 based on the full texts. These articles were reviewed by the panel using predefined inclusion criteria during their first meeting. Additions were also made by the panel. Of these, 133 articles were finally selected for detailed review. Each article was assessed independently by two members of the panel and then judged by the entire panel during a consensus meeting. During this process 59 articles were deemed conclusive and their results were used for final reporting at their second meeting. The conclusions are that: (1) None of the reviewed technologies was able to effectively remove all indoor pollutants and many were found to generate undesirable by-products during operation. (2) Particle filtration and sorption of gaseous pollutants were among the most effective air cleaning technologies, but there is insufficient information regarding long-term performance and proper maintenance. (3) The existing data make it difficult to extract information such as Clean Air Delivery Rate (CADR), which represents a common benchmark for comparing the performance of different air cleaning technologies. (4) To compare and select suitable indoor air cleaning devices, a labeling system accounting for characteristics such as CADR, energy consumption, volume, harmful by-products, and life span is
机译:空气净化技术已在世界范围内得到应用,以改善室内空气质量。应用这些技术的有效性差异很大,通常在受控的实验室环境中确定污染物的去除效率,而在实践中可能无法实现。一些空气净化器在很大程度上无效,而一些会产生有害的副产品。为了总结关于风扇驱动的空气净化技术有效性的已知信息,由来自欧洲,北美和亚洲的空气净化专业专家组成的多学科专家小组对科学文献进行了最新研究,气溶胶科学,医学,化学和通风。没有检查对健康的影响。在主要文献数据库中鉴定出超过26,000篇文章;前两名作者根据其标题和摘要选择了400篇相关文章,而根据全文,他们将该文章的总数减少到160篇。小组在第一次会议期间使用预定义的纳入标准对这些文章进行了审查。专家组也作了补充。其中,最终选择了133篇文章进行详细审查。每篇文章均由小组的两名成员独立评估,然后由全体小组在共识会议上进行评判。在此过程中,有59篇文章被认为是结论性的,其结果用于第二次会议的最终报告。结论是:(1)所审查的技术均不能有效去除所有室内污染物,并且发现许多在操作过程中会产生不良副产物。 (2)颗粒过滤和气态污染物的吸附是最有效的空气净化技术之一,但有关长期性能和适当维护的信息不足。 (3)现有数据难以提取诸如清洁空气输送率(CADR)之类的信息,该信息代表了比较不同空气清洁技术性能的通用基准。 (4)为了比较和选择合适的室内空气净化设备,建立了一个考虑了CADR,能耗,体积,有害副产品和寿命等特征的标签系统。

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