抄録
The performance enhancement and the size reduction of the electric equipment cause the elevation of power density. These subjects make the thermal design difficult for mechanical designers, and increase importance of high efficiency and precision design method. For example, a heatsink that is used in a base station of communication devices is required to be low cost and light weight. Because the weight of heatsink occupies most of the weight of base station. Usually, a thermal designer selects a regular pitch straight fin as a low cost, easy designable and optimizeable. This paper describes a new light weight heatsink optimization method to use irregular pitch fin. In our method, heatsink section is divides to some areas at the beginning. Secondarily, fin-base-thickness and fin-pitch etc was optimized at each areas by using GA(Genetic Algorithm) or SA (Simulated Annearing) method. As a result, an irregular pitch fin heatsink weight is lower than that of a regular pith fin heatsink about 20% by using this method.
