Abstract
In this paper, the pain point that cold chain transportation urgently needs for an efficient disinfection method is pointed out. Thus, this work aims at solving the problems and improving the disinfection efficiency in cold chain transportation. While Ultraviolet-C (UVC) irradiation is an effective method by which to kill viruses, it is difficult to apply the commonly used UVC-LED disinfection light source to ice-covered cold chain transportation due to its uneven light field distribution. Thus, the light field regulation of UVC-LED disinfection for cold chain transportation is studied. A UVC-LED chip with a wavelength of 275 nm was used as a light source, and parallel light was obtained by collimating lenses. Then, microlens array homogenization technology was used to shape the UVC light into a uniform light spot, with an energy space uniformity rate of 96.4%. Moreover, a simulation was conducted to compare the effects of the ice layer on the absorption of UVC light. Finally, an experiment was carried out to verify that the disinfection efficiency can be increased nearly by 30% with the proposed system by disinfecting E. coli (Escherichia coli), and the results indicate that the proposed system is an effective disinfection solution during cold chain transportation.
Highlights
Since 2019, the COVID-19 virus has spread globally, and the main transmission mode is cold chain transportation
The final disinfection effect is shown in Figure 7a; the leftmost is the reference group, that is, the E. coli after 0 min of irradiation
On the premise of the wide application of UVC for disinfection, aiming at the disinfection demands in cold chain transportation and facing the difficulties caused by ice layer and transportation environment, this paper proposes a uniform UVC light disinfection system, which combines light regulation, optical design and a disinfection system, in order to improve disinfection efficiency, overcome a challenging environment and save energy, providing reliable help for disinfection in cold chain transportation
Summary
Since 2019, the COVID-19 virus has spread globally, and the main transmission mode is cold chain transportation. The existence of ice makes the disinfection situation more complicated, which will be discussed later; in addition, cold chain transportation involves many links, making the transmission routes of viruses and bacteria wider. All these bring great difficulties to disinfection in the process of cold chain transportation. The process of UV disinfection will not produce pungent odor and will not produce any chemical residues [7]; it is an effective disinfection method in cold chain transportation
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
