新型涡轮-泵驱动式回路热管设计及热力学分析  

Design of a novel turbine-pump-driven loop heat pipe and its thermodynamic analysis

作　　者：郑小平[1] 丁信伟[1] 喻健良[1] 

机构地区：[1]大连理工大学化工学院

出　　处：《大连理工大学学报》2006年第4期495-498,共4页Journal of Dalian University of Technology

摘　　要：针对热管在逆重力条件下工作时冷凝液回流驱动力不足的问题，提出了一种全新的涡轮-泵驱动回路热管系统．该系统利用蒸汽驱动涡轮和与之连在一起的机械泵，机械泵直接驱动冷凝液返回到蒸发器而实现系统循环，其传热能力由蒸发段的沸腾极限确定，极限热流密度可达到70～80W·cm^-2以上，大大超过了毛细泵回路热管由毛细力所确定的传热能力．热力学分析表明，蒸发段和冷凝段的温差达到10℃以上，涡轮-泵装置即可为冷凝液提供足够的回流驱动力．对于高热流密度耗能设备的热传输问题，该回路热管系统是一种很好的解决方式．A novel turbine-pump-driven device is proposed to supply driving force for the heat pipe operating under anti-gravity conditions. In this device, the turbine and the pump are linked together and driven by vapor; the mechanical pump pumps the condensate to the evaporator to achieve the circulation. Different from conventional capillary pumped loops, in which the low capillary force limits the heat transfer capacity, for the presented system, the maximum heat flux in the evaporator surface determined by the boiling limitation is generally more than 70-80 W · cm^-2. According to thermodynamic analysis, this device can produce enough driving force on condition that the temperature difference between the evaporator and the condenser is greater than 10 ℃. When the temperature uniformity of system is not exactly necessary, this new loop heat pipe will be a prospective solution for transporting large amount of wasted heat from energy consuming components.

关 键 词：回路热管 驱动力 涡轮 泵 

分 类 号：TK172.4[动力工程及工程热物理—热能工程]