Abstract
We report results of investigations on normalization of the air-ionic mode at premises with ultrasonic ionization of humidified air. We substantiated an increase in the concentration of negative air-ions with complex influence of the balloelectric effect and ultrasonic cavitation. We established that the concentration of negative air-ions increases almost in six times at the use of distilled water as a source of air-ions under the action of an ultrasonic generator with a power of 10 W at a distance of 0.5 m. At the same time, there is no generation of ozone and nitrogen oxides due to the combined influence of ultrasonic cavitation in a surface layer of water and the balloelectric effect. We proved that the concentrations of negative and positive air-ions increase due to changes in physical-and-chemical properties of water and the emerging mechanical-and-chemical phenomena with a decrease in the degree of water mineralization of water. We proposed a mechanism for formation of air-ions in the humidified air of industrial premises under the combined action of the balloelectric effect and ultrasound. We substantiated that improvement in the quality of the air-ionic composition of air in industrial premises takes place at a temperature of demineralized water of 20‒25 °C and a directed airflow of 6 m/s towards a working zone, with the combined action of the balloelectric effect and ultrasound, which improves sanitary and hygienic working conditions. We proposed a structure of an automated control system for the air-ionic mode of a working area of industrial premises under artificial air-ionization with a use of an air-ions generator and a ventilation system. It will make possible monitoring and processing of information on technological, electrical and microclimatic parameters, adjusting, coordination of work and joint managing of devices of a ventilation system and an ultrasonic generator of air-ions
Highlights
A concentration of air-ions of both polarities in the air is an important indicator of its quality
Studies in the field of air-ionic effects on human body [1] showed that increased concentrations of negatively charged air-ions contribute to a reduction in fatigue at various types of work
There is a simultaneous occurrence of the balloelectrical effect and ultrasonic cavitation due to the dissolved gases in mineralized water
Summary
A concentration of air-ions of both polarities in the air is an important indicator of its quality. Studies in the field of air-ionic effects on human body [1] showed that increased concentrations of negatively charged air-ions contribute to a reduction in fatigue at various types of work. There is no unambiguous idea of formation mechanisms of air-ions under conditions of humidified air of industrial premises in dependence on a degree of mineralization of water micro drops, which form humidity of air in the presence of dust particles of different nature. The relevance of this study is in determining the mechanisms of influence of humidity depending on a degree of water mineralization, a combined action of ultrasonic cavitation and the balloelectric effect on formation of air-ionic composition of the air in industrial premises to improve sanitary and hygienic working conditions
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