蠕动泵驱动的毛细管环路传热系统的性能研究
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摘要
液态工质在满足一定内径要求的毛细管内会形成稳定的液柱——气塞系统。本文提出利用蠕动泵驱动毛细管内气液相间隔的工质单向循环流动,形成一个具有脉动热管效应的新型两相传热系统。搭建了系统实验装置,以去离子水为工质,当毛细管内径为3 mm,管内工质流速恒定为7 m/min时,实验研究了不同充液率的两相传热系统在加热功率分别为60 W、80 W和100 W时的传热特性。结果表明:该传热系统的最佳充液率为20%,在加热功率为60、80、100 W时,充液率为20%的传热系统达到稳态时的热阻分别为0. 52、0. 38、0. 30℃/W,相比于传统的水冷传热系统其热阻分别降低了32. 5%、45. 7%、50%。
A stable liquid column-air plug system forms when liquid working fluid flows in a capillary tube that meets specific requirements for the inner diameter. In this paper,a novel two-phase heat transfer system with a pulsating heat pipe is proposed for the scenario in which a liquid-vapor two-phase working fluid in the capillary tube is driven by a peristaltic pump and one-way flow forms. The heat transfer characteristics of the system with different liquid filling ratios are investigated experimentally by a self-designed experimental setup with deionized water as the working fluid under 60 W,80 W,and 100 W conditions. The inner diameter of the capillary tube is 3 mm,and the working fluid flows in a capillary tube with a constant flow rate of 7 m/min. The experimental results show that the optimum liquid filling ratio of the heat transfer system is 20%. When the heating power is 60 W,80 W,and 100 W,the thermal resistance of the system with the optimum liquid filling ratio is 0. 52 ℃/W,0. 38 ℃/W,and 0. 30 ℃/W,respectively,which is reduced by 32. 5%,45. 7%,and50%,respectively,compared with that of the traditional water-cooled heat transfer system.
A stable liquid column-air plug system forms when liquid working fluid flows in a capillary tube that meets specific requirements for the inner diameter. In this paper,a novel two-phase heat transfer system with a pulsating heat pipe is proposed for the scenario in which a liquid-vapor two-phase working fluid in the capillary tube is driven by a peristaltic pump and one-way flow forms. The heat transfer characteristics of the system with different liquid filling ratios are investigated experimentally by a self-designed experimental setup with deionized water as the working fluid under 60 W,80 W,and 100 W conditions. The inner diameter of the capillary tube is 3 mm,and the working fluid flows in a capillary tube with a constant flow rate of 7 m/min. The experimental results show that the optimum liquid filling ratio of the heat transfer system is 20%. When the heating power is 60 W,80 W,and 100 W,the thermal resistance of the system with the optimum liquid filling ratio is 0. 52 ℃/W,0. 38 ℃/W,and 0. 30 ℃/W,respectively,which is reduced by 32. 5%,45. 7%,and50%,respectively,compared with that of the traditional water-cooled heat transfer system.
引文
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[3] TONG B Y,WONG T N,OOI K T. Closed-loop pulsating heat pipe[J]. Applied Thermal Engineering,2001,21(18):1845-1862.
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[13] ZHOU Feng,DUAN Wei,MA Guoyuan. Thermal performance of a pump-driven loop heat pipe as an air-to-air energy recovery device[J]. Energy and Buildings,2017,151:206-216.
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[16]马国远,段未,周峰.泵驱动回路热管能量回收装置的工作特性[J].北京工业大学学报,2016,42(7):1095-1101.(MA Guoyuan,DUAN Wei,ZHOU Feng. Operating characteristics of a pump-driven loop heat pipe energy recovery device[J]. Journal of Beijing University of Technology,2016,42(7):1095-1101.)
[17]段未,马国远,周峰.泵驱动回路热管能量回收装置性能的影响因素[J].化工学报,2016,67(10):4146-4152.(DUAN Wei,MA Guoyuan,ZHOU Feng. Factors influencing energy recycle performance of pump-driven loop heat pipe loop device[J]. CIESC Journal,2016,67(10):4146-4152.)
[18]郭振江,邵杰,王伟,等.机械泵驱动分离式热管应用于空调冷量回收[J].建筑节能,2016,44(3):10-12.(GUO Zhenjiang,SHAO Jie,WANG Wei,et al. Mechanically pump-driven separate heat pipe employed in air conditioning system for cooling energy recovery[J]. Building Energy Efficiency,2016,44(3):10-12.)
[19]王道臣,陈志军,韩玉明,等.蠕动泵流量的理论计算与试验验证[J].化工自动化及仪表,2015(2):186-187,216.(WANG Daochen,CHEN Zhijun,HAN Yuming,et al. Theoretical calculation and experimental investigation of peristaltic pump flow[J]. Control and Instruments in Chemical Industry,2015(2):186-187,216.)
[20] AKACHI H,POLASEK F,STULC P. Pulsating heat pipes[C]//5th International Heat Pipe Symposium. Melbourne,Australia,1996:208-217.
[21] MOFFAT R J. Describing the uncertainties in experimental results[J]. Experimental Thermal and Fluid Science,1988,1(1):3-17.
[2] COTTER T P. Theory of heat pipes[J]. Theory of Heat Pipes,1965,25(5):1366-1373.
[3] TONG B Y,WONG T N,OOI K T. Closed-loop pulsating heat pipe[J]. Applied Thermal Engineering,2001,21(18):1845-1862.
[4] BAZZO E,RIEHL R R. Operation characteristics of a small-scale capillary pumped loop[J]. Applied Thermal Engineering,2003,23(6):687-705.
[5] ZHU Lin,YU Jianlin. Simulation of steady-state operation of an ejector-assisted loop heat pipe with a flat evaporator for application in electronic cooling[J]. Applied Thermal Engineering,2016,95:236-246.
[6] BAI Lizhan,LIN Guiping,ZHANG Hongxing,et al. Mathematical modeling of steady-state operation of a loop heat pipe[J]. Applied Thermal Engineering,2009,29(13):2643-2654.
[7]刘杰,裴念强,郭开华,等.机械泵驱动两相冷却系统启动特性的实验研究[J].中国空间科学技术,2008,28(1):64-70.(LIU Jie,PEI Nianqiang,GUO Kaihua,et al. Experimental investigation on start-up characteristics of mechanically pumped two-phase cooling system[J]. Chinese Space Science and Technology,2008,28(1):64-70.)
[8]刘杰,李廷勋,裴念强,等.两相冷却系统过热现象与启动温度关系分析[J].制冷学报,2007,28(6):23-28.(LIU Jie,LI Tingxun,PEI Nianqiang,et al. Analysis on relationship between superheat phenomena and startup temperature for two-phase cooling system[J]. Journal of Refrigeration,2007,28(6):23-28.)
[9]刘杰,李廷勋,郭开华,等.并行蒸发器机械泵驱动两相冷却系统特性的实验研究[J].制冷学报,2008,29(6):5-8.(LIU Jie,LI Tingxun,GUO Kaihua,et al. Experiment on two-phase cooling system with dual-evaporator driven by mechanical pump[J]. Journal of Refrigeration,2008,29(6):5-8.)
[10]刘杰,裴念强,郭开华,等.机械泵驱动两相冷却系统特性分析和实验研究[J].制冷学报,2007,28(2):27-31.(LIU Jie,PEI Nianqiang,GUO Kaihua,et al. Theoretical and experimental investigation on characters of mechanical pumped two phase cooling system[J]. Journal of Refrigeration,2007,28(2):27-31.)
[11]郑小平,丁信伟,喻健良.新型涡轮-泵驱动式回路热管设计及热力学分析[J].大连理工大学学报,2006,46(4):495-498.(ZHENG Xiaoping,DING Xinwei,YU Jianliang. Design of a novel turbine-pump-driven loop heat pipe and its thermodynamic analysis[J]. Journal of Dalian University of Technology,2006,46(4):495-498.)
[12] AMBROSE J H,FEILD A R,HOLMES H R. A pumped heat pipe cold plate for high-flux applications[J]. Experimental Thermal and Fluid Science,1995,10(2):156-162.
[13] ZHOU Feng,DUAN Wei,MA Guoyuan. Thermal performance of a pump-driven loop heat pipe as an air-to-air energy recovery device[J]. Energy and Buildings,2017,151:206-216.
[14]马跃征,马国远,张双.磁力泵驱动两相冷却环路的换热特性[J].化工学报,2015,66(11):4388-4393.(MA Yuezheng,MA Guoyuan,ZHANG Shuang. Heat transfer characteristics of two-phase cooling loop driven by magnetic pump[J]. CIESC Journal,2015,66(11):4388-4393.)
[15]马跃征,许树学,马国远,等.磁力泵驱动两相冷却复合制冷系统特性分析和实验研究[J].制冷学报,2016,37(3):1-5.(MA Yuezheng,XU Shuxue,MA Guoyuan,et al. Characteristic analysis and experimental study on a hybrid system with magnetic pump-driven two phase cooling system[J]. Journal of Refrigeration,2016,37(3):1-5.)
[16]马国远,段未,周峰.泵驱动回路热管能量回收装置的工作特性[J].北京工业大学学报,2016,42(7):1095-1101.(MA Guoyuan,DUAN Wei,ZHOU Feng. Operating characteristics of a pump-driven loop heat pipe energy recovery device[J]. Journal of Beijing University of Technology,2016,42(7):1095-1101.)
[17]段未,马国远,周峰.泵驱动回路热管能量回收装置性能的影响因素[J].化工学报,2016,67(10):4146-4152.(DUAN Wei,MA Guoyuan,ZHOU Feng. Factors influencing energy recycle performance of pump-driven loop heat pipe loop device[J]. CIESC Journal,2016,67(10):4146-4152.)
[18]郭振江,邵杰,王伟,等.机械泵驱动分离式热管应用于空调冷量回收[J].建筑节能,2016,44(3):10-12.(GUO Zhenjiang,SHAO Jie,WANG Wei,et al. Mechanically pump-driven separate heat pipe employed in air conditioning system for cooling energy recovery[J]. Building Energy Efficiency,2016,44(3):10-12.)
[19]王道臣,陈志军,韩玉明,等.蠕动泵流量的理论计算与试验验证[J].化工自动化及仪表,2015(2):186-187,216.(WANG Daochen,CHEN Zhijun,HAN Yuming,et al. Theoretical calculation and experimental investigation of peristaltic pump flow[J]. Control and Instruments in Chemical Industry,2015(2):186-187,216.)
[20] AKACHI H,POLASEK F,STULC P. Pulsating heat pipes[C]//5th International Heat Pipe Symposium. Melbourne,Australia,1996:208-217.
[21] MOFFAT R J. Describing the uncertainties in experimental results[J]. Experimental Thermal and Fluid Science,1988,1(1):3-17.