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Trojan Technologies uses mercury-based ultraviolet (UV) lamps in reactors topurify water. When there are multiple closely spaced lamps in a reactor,significant UV emitted by the various lamps can reach, and 'interact' withneighbouring lamps. Although many of the optical phenomena occurring in a UVreactor are well understood and accounted for in current models, the fate of UVphotons from one lamp reaching the plasma of a neighbouring lamp aftertravelling through the intervening air, quartz, and water has not beeninvestigated in detail. These photons can be transmitted through the plasma,absorbed and re-emitted, or lost. The goal of this project was to develop amore accurate model, which accounts for these plasma interactions, to betterpredict the UV distribution throughout a reactor. We developed a Monte Carlotheoretical model of the photon-plasma interactions; predictions of this modelagree well with work in the literature. We further validated our model byperforming several optical experiments with UV lamps.

Detailed Modelling of Ultraviolet Radiation (UV) from the Interaction of Multiple Lamps in Reactors, using Radiative Transfer Techniques