Abstract
Recently, the newly developed flat type micro heat pipe (,,HP) attracts attention, because of easy installation in PC and the assurance of the enough contact area. In this research, an experimental study is done to investigate the heat transfer steady characteristics of this heat transfer device in detail and finally, a prediction method of maximum heat transfer capacity is proposed. Since the heat pipe operation must be started from the ambient temperature in practice, depending on the needs of a designer, heat transfer transient characteristic is also a matter of concern. Therefore in order to observe the response of heat pipe to a step heat input, transient tests are done.