Volume 10 Issue 3 ( September 2023 )

Spitting in public places is a significant factor in spreading contagious diseases such as viral meningitis, hepatitis, and cytomegalovirus among humans. A recent study found that the novel Coronavirus is also spread via the spit of an infected person. 91.7% of patients have covid-19 detected in self-collected saliva. Many countries have emphasized stopping people from spitting in open or public places such as hospitals, parks, airports, railway stations, etc. The Coronavirus will be deactivated within one minute when it will expose to 353 K temperature. Direct concentrated sunlight has high-intensity UV rays that break down the DNA of Coronavirus and significantly reduce the spread of infection by spitting on infected persons in public places. In this regard, the present work is an attempt to design and construct a solar concentrating spittoon. This spittoon can burn spitted saliva of a person within a minute. It can generate 390 k temperature and 176 watts of heat at its receiver. At this temperature, most viruses (including Coronavirus), bacteria, and pathogens are killed or lose their ability to disease transmission. The results show that the solar concentrating spittoon performs effectively from 8.00 am to 5.00 pm daily. During this period, most people spend their time outside, such as in the park, bus stand, hospital, etc., where this solar concentrating spittoon incinerates human cough and spit within a minute. The efficiency of the solar-concentrating spittoon reached its peak for a duration of nine hours. The thermal efficiency of the receiver was found to be 80 percent, with 20 percent of the heat being dissipated to the nearby environment. It was revealed that the total efficiency was about 70 percent. Installation of this solar concentrating spittoon will help prevent the transmission of deadly contagious diseases among humans and clean the city.

Keywords: Covid-19; Heat transfer; Solar concentrator spittoon; Solar thermal energy; Thermal efficiency; Overall efficiency.