Cost-effective instant air disinfection for building ventilation system by a combination of UV and micro-static electricity

Xie, Yankai; Zhu, Xun; Zhang, Pengyi; Wang, Shan; Yang, Jie; Li, Jinge

doi:10.1016/j.cej.2022.140231

Cited by 12 publications

(13 citation statements)

References 56 publications

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“…Additionally, filters require frequent maintenance and replacement to avoid the proliferation of pathogens on their surfaces. This further increases the system's operating and equipment costs [56]. UVGI is considered an affordable and ready-to-apply strategy to control airborne pathogens compared to ventilation and filtration.…”

Section: Discussionmentioning

confidence: 99%

UVC-Mirror for effective pathogens inactivation in air ducts

Treccani,

Rovetta,

Zanetti

et al. 2024

E3S Web Conf.

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Improving the air quality of indoor environments (IAQ) is of utmost importance to safeguard public health as people spend about 80–90% of their time indoor. Efficient Ultraviolet germicidal irradiation (UVGI) system represents a strategic and sustainable solution to protect from recurrent and new airborne pathogens. Here, we present a new approach to design highly efficient UVGI systems, which can be installed in existing Air Treatment Units (ATU) plants with minimal effort. The increased efficiency relies on the concept of an optical cavity, thanks to its shape and source position. The internal volume consists of a highly reflective cavity illuminated with UV-C lamps. Optical simulations permitted the variation of the parameters to maximize the internal irradiance and, thus, the performance. The sanitation efficacy of the system was assessed on a full-scale pilot system. Tests were carried out under normal operating conditions against various microorganisms showed an inactivation rate of > 99%. The benefits of such systems are triple and encompass economic, environmental, and societal aspects. Since the system requires little energy to operate, its application for air disinfection may yield significant energy savings and ensure a balance between energy sustainability and good IAQ.

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Section: Discussionmentioning

confidence: 99%

UVC-Mirror for effective pathogens inactivation in air ducts

Treccani,

Rovetta,

Zanetti

et al. 2024

E3S Web Conf.

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“…combined plasma and photocatalytic technology and demonstrated possible catalyst regeneration with nonthermal plasma . Xie et al achieved stable and efficient air disinfection performance ( E EO = 5.75 × 10 –6 kWh·m –3 ·order –1 and rate constant = 10 –5 s –1 ) by combining UV and microstatic electricity . A summary of advantages and disadvantages of presented air purification technologies can be seen in Table S1.…”

Section: Comparison Of Energy Efficiencies Of Different Air Purificat...mentioning

confidence: 99%

“…127 Xie et al achieved stable and efficient air disinfection performance (E EO = 5.75 × 10 −6 kWh•m −3 •order −1 and rate constant = 10 −5 s −1 ) by combining UV and microstatic electricity. 128 A summary of advantages and disadvantages of presented air purification technologies can be seen in Table S1.…”

Section: Comparison Of Energy Efficiencies Of Different Air Purificat...mentioning

confidence: 99%

Reactive Air Disinfection Technologies: Principles and Applications in Bioaerosol Removal

Liu

Marjub

et al. 2023

ACS EST Eng.

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As COVID-19 and other infectious diseases continue to spread globally, removing airborne pathogens from confined spaces such as buildings, transportation carriers, and stations is becoming increasingly crucial to curbing transmission and reducing human infection rates. Bioaerosols can act as vectors or media that could store and transport air pollutants and pathogens. To mitigate the adverse effects of bioaerosols and effectively control epidemics, this work reviews the current state-ofthe-art air purification processes and technologies available on the market or demonstrated in laboratory and industrial settings, including ozone oxidation, UV disinfection, and photocatalysis. These reactive air purification processes can be used in conjunction with adsorption or filtration-based systems to enhance disinfection besides the physical capture of particulates or the removal of volatile organic compounds (VOCs). This review aims to provide a concise yet comprehensive overview of various reactive air purification technologies. Their principles, applications, and limitations are briefly discussed to provide insight and guidelines for further development of new air purification processes to address emerging airborne contaminant issues.

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“…Xie et al [64] developed a bioaerosol control strategy for ventilation systems using UV irradiation and microstatic electricity. The results showed the effectiveness of UV under certain conditions.…”

Section: Included Articlesmentioning

confidence: 99%

“…Among the experimental studies [1,2,[12][13][14]17,22,23,25,29,31,40,43,44,46,48,49,52,[54][55][56][57][60][61][62][63][64]70,71], three [12,13,23] performed tests in work or everyday living environments, while [1,2,15,29,48,49,54,56,60,70] performed tests in test chambers. Some papers [14,17,25,43,44,52,[62][63][64]…”

Section: Experimental Workmentioning

confidence: 99%

A Systematic Review on the Application of Ultraviolet Germicidal Irradiation to HVAC Systems

Cattai,

D’Orazio,

Sbardella

2023

Energies

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With the renewed focus on indoor air quality (IAQ) due to “Sick building syndrome” and the recent COVID-19 pandemic, the availability of innovative components and innovative guidance for maintenance and systemic safety design will play an important role, with HVAC systems as protagonists. UV-C irradiation has been investigated for a long time, and some system solutions are known. The aim of this work is to provide an overview of the latest outcomes related to the innovative components of HVAC systems using UV-C irradiation and investigate the current state of the art. A procedure based on the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement was adopted, and the Scopus database was used to query the relevant literature. A total of 66 publications qualified for inclusion in the survey: 29 articles report experimental investigations, 24 articles are related to numerical or theoretical analysis, and both approaches were used in 13 articles. Many papers deal with upper-room UVGI, AHUs, and ducts. A few papers analyse mobile devices. The evaluation of the dose, as in the case of the definition of irradiance, is reported in a small number of articles. This lack of information makes the scenario imprecise and non-quantitative.

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Cost-effective instant air disinfection for building ventilation system by a combination of UV and micro-static electricity

Cited by 12 publications

References 56 publications

UVC-Mirror for effective pathogens inactivation in air ducts

UVC-Mirror for effective pathogens inactivation in air ducts

Reactive Air Disinfection Technologies: Principles and Applications in Bioaerosol Removal

A Systematic Review on the Application of Ultraviolet Germicidal Irradiation to HVAC Systems

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