ABSTRACT
Self-ballasted compact fluorescent lamps (SBCFL's) are desired to be small and highly efficient, because they are designed to replace incandescent lamps for energy saving. After the SBCFL of A-bulb shape was launched in 1998 [1], we have continued to improve the characteristics, especially on two issues: quick light output run-up, and thermal reliability of the integrated electronic circuits. These two issues appear to have no relation, but the both are linked technologically on the importance of heat analysis. The run-up characteristics of amalgam-included SBCFL's depend on the mercury vapor pressure, which is strongly concerned with the temperature of amalgam [2]. In this paper, we focus on the heat-transfer analysis. Although software of computational fluid dynamics is often helpful to treat heat problems, the method of heat-transfer network analysis is also considered to be valid for the calculation of SBCFL's. The reason is that many of SBCFL's generally have simple and similar structures. It also has advantages on time and cost.
2. MODEL DESCRIPTION Heat-transfer network analysis was applied for the steady problems of SBCFL's without outer globes in
the previous work [3]. Here, we solve steady and non-steady problems of SBCFL's with and without globes, using basically the same method.
