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• W4308522410 endingPage "140231" @default.
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• W4308522410 abstract "• Coupling UV with micro-static electricity for air disinfection was studied. • Disinfecting various microbial aerosols was tested in full-scale ventilation ducts. • UV 185+254 disinfection was more robust than that of UV 254 under adverse conditions. • The combination process realized stable and efficient air disinfection performance. • The concept is low in pressure drop, energy consumption, and equipment costs. The increased threats of pathogenic bioaerosol make air disinfection in heating, ventilation, and air conditioning (HVAC) systems crucial to occupants’ health. To satisfy the high efficiency, superspeed, and wide temperature range of HVAC air disinfection, UV irradiation (UV 254 / UV 185+254 ) and its combination with micro-static electricity were studied in two full-scale ducted ventilation systems. UV 254 could efficiently disinfect S.albus (>99%) at high temperatures (31±2 °C) and low airflow rates (1.2 m s -1 ) but was weakened at lower temperatures and higher airflow rates. Its combination with micro-static electricity could remarkably overcome these adverse factors and realize efficient disinfection within the retention time of 0.21 s. Especially for the relatively stubborn B.subtilis var. niger , the combination process improved the disinfection efficiency to 82% at 16±2°C and the airflow rate of 2.4 m s -1 , while UV 254 was only 52.9%. Since the UV 185+254 disinfection was more effective than that of UV 254 , the UV 185+254 -based combination could further enhance the B.subtilis var. niger to 93.1%. Besides the disinfection stability, the combination process has advantages in pressure drop (around 50 Pa), energy consumption (e.g., 0.115 kW·h km -3 ), and equipment costs (1,500- 3,000 CNY), making it potentially cost-effective for air disinfection in HVAC systems." @default.
• W4308522410 created "2022-11-12" @default.
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• W4308522410 date "2023-02-01" @default.
• W4308522410 modified "2023-10-18" @default.
• W4308522410 title "Cost-effective instant air disinfection for building ventilation system by a combination of UV and micro-static electricity" @default.
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• W4308522410 doi "https://doi.org/10.1016/j.cej.2022.140231" @default.
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