Analysis of Fundamental Discharge Phenomena and its Application to Illumination under Green Environment

通常在荧光灯中使用汞，因为它的效率很高。然而，汞的使用导致灯在低环境温度下点火困难，并且灯达到饱和亮度水平需要相对较长的积累时间。研制了一种无汞平放荧光灯，其对角线尺寸为0.5 ~ 5.2英寸。该灯结构简单，放电工作稳定，具有良好的光学特性，例如，在整个放电体积内亮度均匀的444mm×27mm灯的亮度为11000cd m^<-2>，光通量为860lm，效率为30lm W^<-1>。虽然光通量足够的应用，效率是一半的市售汞荧光灯。提高光效是无汞平放荧光灯的重要课题。本研究的目的是了解气相动力学在这些无汞平放荧光灯在不同条件下工作的功效中的作用。为此，我们建立了Ar/Ne/Xe混合物中正柱的零维动力学模型。模型计算结果与实验结果比较合理，可以在各种放电条件下进行模拟

Generally mercury is used in fluorescent lamps because it provides high efficacy. The use of mercury, however, leads to difficulties in lamp ignition at low ambient temperature and also a relatively long build-up time is necessary for the lamp to reach the saturated luminance level.A mercury-free flat discharge fluorescent lamp with diagonal size ranging from 0.5 to 5.2 in has been developed. The lamps have a simple structure, with stable discharge operation and good optical characteristics have been obtained For example, a luminance of 11000cd m^<-2>, a luminous flux of 860lm, and an efficacy of 30lm W^<-1> were attained with the 444mm×27mm lamp with uniform luminance throughout the discharge volume. Although the luminous flux is sufficient for the application, the efficacy is half that of commercially available mercury fluorescent lamps. An improvement of the luminous efficacy is the most important issue for the mercury-free flat discharge fluorescent lamp. The goal of the present study is to understand the role of the gas phase kinetics in the efficacy of these mercury-free flat discharge fluorescent lamps operating under different conditions. To this end, we developed a zero-dimensional kinetic model of the positive column in Ar/Ne/Xe mixtures. Results from the model compare reasonably well with experiment and allow us to under various discharge conditions