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首页> 外文期刊>Building and Environment >Sterilization effectiveness of in-duct ultraviolet germicidal irradiation system in liquid desiccant and indirect/direct evaporative cooling-assisted 100% outdoor air system
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Sterilization effectiveness of in-duct ultraviolet germicidal irradiation system in liquid desiccant and indirect/direct evaporative cooling-assisted 100% outdoor air system

机译：液体干燥剂和间接/直接蒸发冷却辅助100％户外空气系统中导尿紫外杀菌辐照系统的灭菌效果

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Microorganism contamination in air conditioning systems can cause respiratory diseases in building occupants. This study aims to evaluate and predict the performance of an in-duct ultraviolet germicidal irradiation (IDUVGI) system to reduce the microorganisms that can grow in the liquid desiccant and indirect/direct evaporative cooling-assisted 100% outdoor air system (LD-IDECOAS). Bacteria and mold on the direct evaporative cooling (DEC) element and in the outdoor and supply air were monitored using a swab and Petrifilm for surfaces and impact sampler for air during the operation of the LD-IDECOAS. Microbial contamination was first verified in the air before performing the sterilization experiment. The experimental results showed that the airborne bacteria were reduced by 78.3% after the operation of the ID-UVGI system but there was almost no reduction in the airborne mold. The bacteria and mold concentration on the DEC surface were decreased by 99.7% and 96.7% respectively 3 h after the ID-UVGI operation. Even after the ID-UVGI system was operated for 6 days, the microbial contamination in the downstream water was not decreased significantly; the inside of the DEC element was suspected to be improperly sterilized. The operating times of the ID-UVGI system needed to inactivate the microorganisms were predicted from the UV-C intensity distribution by irradiation analysis. Legionella sp. and Penicillium sp. were predicted to be inactivated by 99.9% with UV-C exposures of 6 s and 15 min 57 s or less respectively when the LD-IDECOAS is operated at the highest air flow rate.
机译：空调系统中的微生物污染会导致建筑物的呼吸系统疾病。本研究旨在评估和预测导管紫外杀菌辐照（IDUVGI）系统的性能，以减少可在液体干燥剂和间接/直接蒸发冷却辅助100％户外空气系统中生长的微生物（LD-IdeCoas） 。在LD-IdeCoas的操作期间，使用拭子和Petrifilm在LD-IdeCoas的操作期间使用拭子和Petrifilm来监测对直接蒸发冷却（DEC）元件和室外和供应空气的细菌和户外和供应空气。在进行灭菌实验之前首先在空中验证微生物污染。实验结果表明，ID-UVGI系统的操作后，空气中细菌在操作后减少了78.3％，但空气霉菌几乎没有减少。在ID-UVGI操作后，DED表面的细菌和模浓度分别在3小时下降99.7％和96.7％。即使在ID-UVGI系统运行6天后，下游水中的微生物污染也不会显着下降;怀疑DEC元素的内部被灭菌不当。通过辐射分析从UV-C强度分布预测灭活微生物所需的ID-UVGI系统的经营时间。 Legionella sp。和penicillium sp。预计当LD-IdeCoas以最高空气流速运行时，预计将通过6 ​​s和15分57 S或更低的UV-C暴露而灭活99.9％。

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