The study evaluated 40 different room configurations from buteoank's blog

Commercial UV light has been in existence for decades as a germicidal tool of . Pioneering experiments in disinfecting air were performed in the 1920s and 30s. In 1940, Dr. William F. Fells studied its use for reducing the spread of measles in schools. In 1989, Dr. Richard Riley and Dr. Edward Nardell prepared a comprehensive article on applying UV to air disinfection.1 By installing ceiling-mount UV fixtures in a room, the authors compared the impact of upper air UV equivalent to 20 air changes per hour (ACH). The rule was that one 30-watt UV fixture equaled 20 ACH in a 200 ft2 room. From a biological contamination perspective, this installation can significantly reduce the amount of air turned over in a facility.

Research conducted at the National Institutes of Health (NIH) by Farhad Memarzadeh, MD, with assistance from Andrew Manning, MD, indicates that UVGI, used in the proper configuration with adequate ventilation flow rate, can have a significant impact on reducing the number of viable Mycobacterium tuberculosis (TB) bacteria in a patient room.2 The researchers also validated the fact that UV can reduce the total airflow required, resulting in a cost savings in the ventilation system, as well as an overall operational cost savings because of the reduced air change requirement. The study evaluated 40 different room configurations and three different combinations of lamp intensity and location. The study produced the following conclusions as related to this paper。

The Floatel Triumph is under construction at Keppel FELS. It is scheduled to be delivered in 4Q 2015. The complete W?rtsil? scope of supply includes, in addition to the two AQUARIUS BWMS units, a series of W?rtsil? engine room pumps, and a pre-engineered integrated auxiliary equipment module.

The AQUARIUS UV BWMS is a modular system using a two-stage approach involving filtration and medium-pressure UV disinfection. The W?rtsil? AQUARIUS UV ballast water management system meets the International Maritime Organization’s D2 discharge standard, and received type approval in December 2012. The profitable appliance of medium pressure mercury discharge lamps in UV curing is basically linked to the quality of thermal and electrical lamp operating conditions. Especially the highly loaded and doped discharge lamps have to be operated under well controlled electrical conditions.

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By buteoank
Added Aug 24 '15


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