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Design and Testing of a UV Disinfection System Based on Non-Mercury Containing Lamps 基于无汞灯的紫外线消毒系统的设计与测试
发布日期: 2006-11-01
采用准分子灯技术的紫外线(UV)水消毒系统是一个合适的选择 在灯汞含量受到限制或不受欢迎的情况下。准分子灯 存在能够产生杀菌紫外线辐射,并具有适当的电气效率和相关的 杀菌效果和水透射率方面的波长。 结合NASA在执行长期人类太空任务方面的利益 对汞的严格限制显而易见,基于XeBr*准分子设计了紫外线系统 灯技术。XeBr*准分子灯以特定的频率发射几乎单色的辐射 波长282nm。使用XeBr*准分子灯进行的基线实验 证明其杀菌紫外线输出对枯草芽孢杆菌的灭活非常有效 孢子。 使用拉格朗日模型开发了这种新反应堆系统的数值原型 计划建模方法包括流体力学和粒子轨迹的模拟 使用商用计算流体力学软件(FLUENT)。精确的 反应堆内辐射强度场的模拟需要开发一种新的 强度场模型。反应器的最终设计是通过迭代程序完成的 使用这些建模工具,从而实现反应堆特性的优化。 对数值原型行为的模拟表明,在以下方面效率很高: 微生物失活和功耗。包括9个参考文献、图表。
Ultraviolet (UV) water disinfection systems employing excimer lamp technology represent a suitable choice in situations where lamp mercury content is restricted, or otherwise undesirable. Excimer lamps exist that generate germicidal UV radiation with appropriate electrical efficiency, and at relevant wavelengths in terms of germicidal effectiveness and water transmittance. In conjunction with NASA's interests in conducting long-duration human space missions, where severe restrictions on mercury are evident, a UV system was designed based on XeBr* excimer lamp technology. XeBr* excimer lamps emit nearly monochromatic radiation at a characteristic wavelength of 282 nm. Baseline experiments conducted with a XeBr* excimer lamp demonstrated its germicidal UV output to be highly effective for inactivation of Bacillus subtilis spores. A numerical prototype of this new reactor system was developed using a Lagrangian modeling scheme. The modeling approach involved simulation of fluid mechanics and particle trajectories using commercially available computational fluid dynamics software (FLUENT). Accurate simulations of the radiation intensity field within the reactor required the development of a new intensity field model. The final design of the reactor was produced by an iterative procedure using these modeling tools, thereby allowing for optimization of reactor characteristics. Simulations of the behavior of the numerical prototype indicated high efficiency, in terms of microbial inactivation and power consumption. Includes 9 references, figures.
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发布单位或类别: 美国-美国给水工程协会
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