A Plasama Model Based On Energy Balance For Sulfur Lamp

The rapid development of modern light source, as well as the diversification of applications require light source markets showing a variety of competitive situation, but also makes standard of light efficiency, stability, color rendering index, regulatory, cost become more higher. In terms of development, Edison’s inventation of the incandescent lamp means the birth of electronic light source development focus from the first generation of thermal luminescence incandescent light source to the second generation of gas-discharge light emitting photoluminescence combined with fluorescent, and then to the third generation The high power density. At present fourth generation electronic light source such as LED and the electrodeless discharge lamp has been well developed. Plasma emission mechanism of microwave-driven sulfur found by the end of the last century contributed to the study of the microwave sulfur lamp. Due to its high efficiency, long the electrodeless lamp life, continuous full-spectrum light-emitting, it has been treated as a new member of fourth-generation electrode gas discharge lamp, also attracted more scientists and engineers to improve. So far, the commercialization of microwave sulfur lamp has high power indoor and outdoor lighting applications in the ports, docks, squares, factories, warehouses, stage, gymnasium, public works, agriculture, feeding the application, and achieved very good results. Microwave sulfur lamp in the play to its own advantages but also showed some of the problems to be overcome such as fellow:the existing magnetron drive with motor structural stability is not enough to fully play out the potential of long life light bulbs; the cost of RF sources is so high that it should be show more advantages in efficiency, stability, color rendering index to compare other high-power light source.In order to better play out the potential of the sulfur lamp, this thesis study on the thermal state of the simulation theory of microwave sulfur lamp. Actually Microwave sulfur lamp light-emitting process is a complex process of interaction between microwave and molecular plasma, also is a cutting-edge interdisciplinary subject. For the purpose of the study, there are two main ideas for sulfur lamp light simulation as fellow: one is employing equivalent electromagnetic model simulation of microwave sulfur lamp, to study the standing wave ratio, the field distribution; another way is employing plasma simulation method to study the process of the light emitting. This paper along the latter idea, in-depth analysis on the basis of today’s plasma theory, focused on the energy balance of the process. Mainly as follows:1. Summarized sulfur lamp’s characteristics and the problems based on my research. made his concluding its electromagnetic structure of the model simulation for laboratory-like light CST model, then has introduced current simulation method and experiment method.2. Analyzed the electric field model, heat conduction model, radiation model and chemical equilibrium with the particle concentration of the self-consistent local thermal equilibrium model, which based on the local energy balance equation. Give the framework for numerical calculation process.3. Calculated parameters of these sub-model in the theory required, such as thermal conductivity, specific conductance, radiation absorption coefficient, a detailed derivation of theoretical formulas.4. Summarized my work, and point some important limitation.