Performance Analysis And Experimental Research On Compound Heat Pipe Radiator For Electronic Component

Recently, electron component is being high speed and high frequency to result in increasing of heat productivity along with rapid development of electron technology. Now the heat flow density of electronic component is up to 104W/m2-105 W/m2, and is increasing continually and rapidly. As a result, how resolve heat problem of electron component effectively is urgent affairs that society development have to face at present. This paper's background is society need, and assimilates experience of former scholar to improve on a liquid self-circulating radiator for electronic component and develops a new form of more effective compound heat pipe radiator for electron component. at the same time, which is charged respectively by four natural working substance——methanol, ethanol, acetone, water and a refrigeration——R123.This paper combines a liquid self-circulating radiator and flat heat pipe radiator, utilizes thermosiphon and self-circulating refrigeration principle, designs and produces a new form of heat pipe radiator. There are two different structure forms of heat pipe, which supply each other in function. This paper set up mathematics model for this compound heat pipe and analyzes its heat transfer process to provide theoretic thereunder. In addition, that building experiment setting is used for experiment and analyzed performance of the heat pipe radiator that using five different working substance. According to experiment and calculating, upside and downside a couple of condensation part are in reason and valid. When power is 20W, working substance is R123, the surface temperature is below 35℃; when power is 200W, the surface temperature of electron compound is below 70℃, the total thermal resistance is 0.285℃/W, which exhibits this compound heat pipe great applicability for long-range heat power. Through using five working substance——methanol,ethanol,acetone,water,R123, performance of R123 is best, performance of acetone is best in natural working substance, following is ethanol,methanol,water. In case of long-range, best Charge rate increases with heat power increasing, when heat power is less than 140W, best Charge rate is about 80%, when heat power is more than 140W, best Charge rate is about 90%.This paper proves the heat pipe radiator'effect is effective and is the same with nowadays and future need of electron component radiating heat through theoretic analysis and experiment...