An evaluation of ultraviolet germicidal irradiation (UVGI) technology in health care facilities
An evaluation of ultraviolet germicidal irradiation (UVGI) technology in health care facilities
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医疗机构中紫外线杀菌照射 (UVGI) 技术的评估
DOI：
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发表时间：
2008
期刊：
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通讯作者：
Jeremy B. Dreiling
中科院分区：
文献类型：
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作者：
Jeremy B. Dreiling
卫生保健设施负责治疗高度感染和传染的病人，同时也负责治疗最容易感染疾病的病人。因此，重要的是，战略性地应用每一项可用的技术和应用，以保护每一位乘客。特别地，紫外线杀菌照射（UVGI）技术在当今的工业中被用作感染控制装置，主要在医疗保健设施中。本文讨论了应用UVGI去除有害空气传播病原体的有效性和经济影响，并概述了有关病毒、细菌和真菌等空气传播病原体的背景信息。除了UVGI，本文涉及的其他工程控制方法包括机械通风和空气分配，过滤和压差控制。因此，建立了一个诊断和治疗领域的经济评价，以比较紫外线GI技术和其他控制方法。该评估包括一个设计满足规范要求的基线系统;一个上层房间UVGI系统;一个加热，通风和空调（HVAC）系统，增加每小时换气次数（ACH）;和一个AHU中的UVGI系统。首先，成本，能源成本和维护成本是经济比较的基础。所有替代方案的预测有效性保持不变，并确定实现预期有效性所需的时间。因此，具有增加的ACH的上部房间UVGI系统和HVAC系统产生高得多的比较年度成本以及显著更好的房间消毒效果。与具有相同房间消毒效果的基准系统相比，AHU中的UVGI系统导致了较低的年度成本。通过设计具有UVGI的感染控制系统，HVAC工程师将更有能力和成功地为这些关键设施提供最佳控制系统。
Health care facilities are responsible for treating highly infected and contagious patients at the same time as patients who are most susceptible to disease. Therefore, it is important that every available technology and application to be strategically applied to protect each and every occupant. In particular, ultraviolet germicidal irradiation (UVGI) technologies are being used in today’s industry as infection control devices, primarily in health care facilities. This paper addresses the effectiveness and economic impact of applying UVGI to remove harmful airborne pathogens and outlines background information on infectious airborne pathogens such as viruses, bacteria, and fungi. Besides UVGI, other engineering control methods covered in this paper include mechanical ventilation and air distribution, filtration, and differential pressure control. Consequently, an economic evaluation of a diagnostic and treatment area was created to compare UVGI technologies and other control methods. The evaluation consists of a baseline system designed to meet code requirements; an upper-room UVGI system; a heating, ventilating, and air-conditioning (HVAC) system with an increased air changes per hour (ACH); and a UVGI system in an AHU. First costs, energy costs, and maintenance costs were the basis of economic comparison. The predicted effectiveness of all the alternatives was held constant and the time required to achieve the desired effectiveness was determined. As a result, the upper-room UVGI system and HVAC system with an increased ACH yielded much higher comparative annual costs as well as significantly better room disinfection effectiveness. The UVGI system in the AHU resulted in a lower comparative annual cost than the baseline system with the same room disinfection effectiveness. By designing infection control systems with UVGI, HVAC engineers will be more capable and successful in providing the optimal control system to these critical facilities.