Studies on the Efficiency Assessment of Equipments for the Formation and Decomposition of Ozone in the Closed Room. Tests Using One Type of Equipment.

Abstract

The efficiency of the equipments on the market for ozone formation and decomposition by ultraviolet rays in the closed room was measured and assessed. There were two stick-type low pressure ultraviolet quartz lamps in the equipment. Lamps were placed in parallel with each other in the box, and the air was discharged after being sucked by a built-in fan. First, the only ozone formation lamp was lit. As the air containing some ozone was absorbed into the testing room (4.5m3) having no ozone, the variation of ozone concentration was measured every one minute. Second, the only ozone decomposition lamp was lit and the air reaching a given ozone concentration was discharged after being sucked in, and then, the variation of the residual ozone concentration was measured. In addition, the equipment was stopped as the ozone concentration reached the plateau level, and then the velocity of the spontaneous ozone decomposition was measured. As a result of the above-mentioned experiment, some equations, figures, and tables concerning the mutual relations among the number of ozone and UV lamps, the initial ozone concentration, the residual ozone concentration, the concentration reaching the steady state level, and the beginning or the finishing time of reactions, etc. were obtained. The above-mentioned data gave us a clue to the control of the ozone concentration in the closed room.