CAJ | 학술논문

环路热管(Loop Heat Pipe,LHP)是一种靠蒸发器的毛细芯产生毛细力驱动回路运行,利用工质相变来传递热量的高效传热装置.研制了一套平板式蒸发器、风冷式冷凝器的小型环路热管(MLHP),MLHP的毛细芯为500目不锈钢丝网,工质为丙酮,蒸发器、冷凝器以及所有管路均由紫铜制成.主要研究了平板型MLHP在不同热负荷条件下的温度波动特性,并重点研究了倾角以及充灌量等对MLHP系统温度波动的影响,且给出相应的合理解释.实验结果表明,平板式MLHP在2～3W/cm~2热流密度区间范围内容易发生温度波动.
배로열관(Loop Heat Pipe,LHP)시일충고증발기적모세심산생모세력구동회로운행,이용공질상변래전체열량적고효전열장치.연제료일투평판식증발기、풍랭식냉응기적소형배로열관(MLHP),MLHP적모세심위500목불수강사망,공질위병동,증발기、냉응기이급소유관로균유자동제성.주요연구료평판형MLHP재불동열부하조건하적온도파동특성,병중점연구료경각이급충관량등대MLHP계통온도파동적영향,차급출상응적합리해석.실험결과표명,평판식MLHP재2～3W/cm~2열류밀도구간범위내용역발생온도파동.
Loop heat pipes are heat transfer devices based on the evaporation and condensation of a working fluid, and using capillary pumping forces to ensure the fluid circulation. A series of tests have been carried out with a miniature loop heat pipe (MLHP) with flat evaporator and a fin-and-tube type condenser. The loop was made of pure copper with stainless mesh wick and acetone was used as the working fluid. At low heat loads, temperature oscillations were observed throughout the loop. The characteristics of temperature oscillation of the flat MLHP at heat fluxes from 2W/cm~2 to 3W/cm~2were studied. The compensation chamber was considered as the most critical component of the MLHP and its hydrodynamic state dictated the extent and the characteristics of the temperature oscillations for the input heat load. The heat leaks from the evaporator to the compensation chamber, the heat loss to ambient and subcooled liquid temperature dictated the vapor condition inside the compensation chamber, and the rate of vapor growth or dissipation dictated the nature of the temperature oscillation. The effects of different liquid charging ratio and the tilt angle to the temperature oscillations were studied in detail.