Coronaviruses disinfection of a mobile object by a germicidal UVC lamp
Materials and Fluids Laboratory, Preparatory Institute for Engineering Studies of Tunis, University of Tunis, Tunis, Tunisia
Accepted: 10 August 2022
Published online: 6 September 2022
The aim of the present work is to study the disinfection of a mobile object by UVGI lamps. Two different disinfection processes are examined: the stationary and dynamic disinfection. In the stationary process, the infected object moves and takes its place under the lamp during a stationary exposure time, tes. However, in the dynamic process the object is in motion with a velocity, v, during a dynamic exposure time ted. For the stationary disinfection process, the expressions of irradiance lamp and the received dose are established by taking into account the non-uniformity of the light emission into the object surface. In the dynamic disinfection process, novel expressions of the lamp irradiance and the received dose are established by considering the velocity of the object, the non-uniformity of the light emission and so explicit expressions equations depending on dynamic exposure time are reported. The last developments are used to study the disinfection of a mobile object by an airline check-in luggage according to the two disinfection processes. The number of the required lamps to kill different varieties of Coronaviruses is calculated. For the same exposure time, 10 s, the dynamic disinfection process is found to be more efficient than the stationary disinfection process and the number of the required lamps is reduced from 20 to 50%.
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