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Parametric Study of a Vertical Ellipsoidal HgTLI Discharge Lamp on Entropy and Heat Transfer

This article aims at studying the effect of arc current, pressure, and thallium percentage on the entropy and the average Nusselt number, within an ellipsoidal HgTLI discharge lamp with high intensity in a vertical position. To achieve this objective, we developed a 3-D model in laminar study and po...

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Published in:	IEEE transactions on plasma science 2023-07, Vol.51 (7), p.1-0
Main Authors:	Ferjani, Besma, Hamida, Mohamed Bechir Ben
Format:	Article
Language:	English
Subjects:	Atomic ratio COMSOL Multiphysics Direct current Discharge lamps Electrodes Entropy Fluid flow Heat transfer HgTLI lamp High intensity discharge lamps local thermodynamic equilibrium (LET) Mathematical models Mercury Metals Nusselt number Parameters Parametric statistics Plasma temperature Plasmas Pressure effects Thallium Three dimensional models Vertical orientation
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container_title	IEEE transactions on plasma science
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creator	Ferjani, Besma Hamida, Mohamed Bechir Ben
description	This article aims at studying the effect of arc current, pressure, and thallium percentage on the entropy and the average Nusselt number, within an ellipsoidal HgTLI discharge lamp with high intensity in a vertical position. To achieve this objective, we developed a 3-D model in laminar study and powered with direct current. Then, we used the commercial software COMSOL Multiphysics to solve the system of equations for mass, energy, and momentum. Indeed, important parameters, such as the thallium percentage, the electric current, and the pressure, were modified and their effect on entropy and average Nusselt number were studied. The results show that the increases in the different parameters, namely, pressure, arc current, and the mercury to thallium atomic ratio, increase the agitation of the lamp's particles, which affect the average Nusselt number and the amount of entropy produced via heat transfer and viscous friction.
doi_str_mv	10.1109/TPS.2023.3284410
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language	eng
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source	IEEE Electronic Library (IEL) Journals
subjects	Atomic ratio COMSOL Multiphysics Direct current Discharge lamps Electrodes Entropy Fluid flow Heat transfer HgTLI lamp High intensity discharge lamps local thermodynamic equilibrium (LET) Mathematical models Mercury Metals Nusselt number Parameters Parametric statistics Plasma temperature Plasmas Pressure effects Thallium Three dimensional models Vertical orientation
title	Parametric Study of a Vertical Ellipsoidal HgTLI Discharge Lamp on Entropy and Heat Transfer
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