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Airborne Infection

The Experts below are selected from a list of 288 Experts worldwide ranked by ideXlab platform

Edward A. Nardell – 1st expert on this subject based on the ideXlab platform

  • Eggcrate UV: A whole ceiling upper-room ultraviolet germicidal irradiation system for air disInfection in occupied rooms
    Indoor Air, 2014
    Co-Authors: Jacqueline Linnes, Stephen N. Rudnick, G M Hunt, James J Mcdevitt, Edward A. Nardell

    Abstract:

    A novel whole ceiling upper-room ultraviolet germicidal irradiation (UVGI) system (eggcrate UV) has been developed that incorporates open cell “eggcrate” suspended ceiling panels and bare UV lamps with a ceiling fan. Upper-room UVGI is more effective than mechanical ventilation at much lower installation and operating costs. Conventional upper-room UVGI fixtures employ multiple tightly spaced horizontal louvers to confine UV to the upper-room. These louvered fixtures protect occupants in the lower-room from UV-induced eye and skin irritation, but at a major cost to fixture efficiency. By using a lamp and ballast from a conventional upper-room UVGI fixture in the eggcrate UV system, the germicidal efficacy was markedly improved even though the UV radiation emitted by the lamp was unchanged. This fundamental change in the application of upper-room UVGI air disInfection will permit wider, more effective application of UVGI globally to reduce the spread of Airborne Infection. This article is protected by copyright. All rights reserved.

  • the importance of integrated system design for the effectiveness of portable air cleaners in Airborne Infection
    , 2013
    Co-Authors: T Van Reenen, Edward A. Nardell, Paul A Jensen, F Salie, Jan H Grobler

    Abstract:

    Copyright: 2013 The Union. Published in The International Journal of Tuberculosis and Lung Disease, vol. 17(12), pp 92-93

  • Upper-room ultraviolet germicidal irradiation (UVGI) for air disInfection: A symposium in print
    Photochemistry and Photobiology, 2013
    Co-Authors: Edward A. Nardell, Richard Vincent, David H. Sliney

    Abstract:

    Upper-room ultraviolet germicidal irradiation (UVGI) has several applications, its most important use is to reduce tuberculosis transmission in high-burden, resource-limited settings, especially those dealing with epidemics of drug-resistant disease. The efficacy of upper-room (UVGI) to reduce the transmission of Airborne Infection in real-world settings is no longer in question. International application (dosing) guidelines are needed, as are safety standards and commissioning procedures. A recent symposium to build consensus on guidelines discussed specifications for affordable UVGI fixture designs, safety, performance, computer-aided design (CAD) for UVGI, maintenance, dosimetry, gonioradiometric measurement and innovation using germicidal LEDs.

William P Bahnfleth – 2nd expert on this subject based on the ideXlab platform

  • simulation and monetization of collateral Airborne Infection risk improvements from ultraviolet germicidal irradiation for coil maintenance
    Science and Technology for the Built Environment, 2018
    Co-Authors: Joseph Firrantello, William P Bahnfleth

    Abstract:

    Ultraviolet germicidal irradiation of cooling coils controls biofouling that increases airflow resistance and decreases heat transfer coefficient. Though lower in power than air disInfection systems, coil ultraviolet germicidal irradiation systems should provide some collateral air treatment benefit. This benefit is estimated through monetization of simulated nonfatal illness spread in a group of commercial buildings. Benefits were quantified using appropriate metrics for each building type: work-loss days for office buildings, hospital acquired Infections for healthcare facilities, and disability adjusted life years for schools. The pre-ultraviolet germicidal irradiation annual cost of occupant illness was the same order of magnitude as annual energy cost. Area-normalized cost was similar in magnitude for all buildings. The collateral air disInfection of coil surface ultraviolet germicidal irradiation reduced baseline illness costs by 3.5% or less, but the resulting cost savings exceeded the energy cost …

  • Simulation and monetization of collateral Airborne Infection risk improvements from ultraviolet germicidal irradiation for coil maintenance
    Science and Technology for the Built Environment, 2018
    Co-Authors: Joseph Firrantello, William P Bahnfleth

    Abstract:

    Copyright © 2017 ASHRAE. Ultraviolet germicidal irradiation of cooling coils controls biofouling that increases airflow resistance and decreases heat transfer coefficient. Though lower in power than air disInfection systems, coil ultraviolet germicidal irradiation systems should provide some collateral air treatment benefit. This benefit is estimated through monetization of simulated nonfatal illness spread in a group of commercial buildings. Benefits were quantified using appropriate metrics for each building type: work-loss days for office buildings, hospital acquired Infections for healthcare facilities, and disability adjusted life years for schools. The pre-ultraviolet germicidal irradiation annual cost of occupant illness was the same order of magnitude as annual energy cost. Area-normalized cost was similar in magnitude for all buildings. The collateral air disInfection of coil surface ultraviolet germicidal irradiation reduced baseline illness costs by 3.5% or less, but the resulting cost savings exceeded the energy cost to operate the coil ultraviolet germicidal irradiation systems by as much as a factor of 20. The effectiveness of air cleaning methods already in place, such as ventilation and filtration, directly influences the incremental benefit of additional air cleaning measures.

David H. Sliney – 3rd expert on this subject based on the ideXlab platform

  • Upper-room ultraviolet germicidal irradiation (UVGI) for air disInfection: A symposium in print
    Photochemistry and Photobiology, 2013
    Co-Authors: Edward A. Nardell, Richard Vincent, David H. Sliney

    Abstract:

    Upper-room ultraviolet germicidal irradiation (UVGI) has several applications, its most important use is to reduce tuberculosis transmission in high-burden, resource-limited settings, especially those dealing with epidemics of drug-resistant disease. The efficacy of upper-room (UVGI) to reduce the transmission of Airborne Infection in real-world settings is no longer in question. International application (dosing) guidelines are needed, as are safety standards and commissioning procedures. A recent symposium to build consensus on guidelines discussed specifications for affordable UVGI fixture designs, safety, performance, computer-aided design (CAD) for UVGI, maintenance, dosimetry, gonioradiometric measurement and innovation using germicidal LEDs.