倾角及加热功率对乙烷脉动热管传热性能的影响
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摘要
为了研究脉动热管在中低温区的传热性能,设计了一台乙烷脉动热管,采用低温Stirling制冷机为冷源。实验研究了在不同温区范围内,加热功率和倾角两个因素对乙烷脉动热管传热性能的影响。研究结果显示:在-40℃和-70℃温区,当倾角小于45°时,倾角对传热温差的影响较小,而倾角在45°～90°之间时,随着倾角的增大,传热温差呈明显上升趋势。在较低加热功率下,倾角对传热温差的影响较小,在较高加热功率时,倾角对传热温差的影响较大。实验还发现在同一倾角下,随着加热功率的增加,传热温差逐渐增大,传热热阻呈现出先减小后增大的趋势。
To study the heat transfer performance of the pulsating heat pipe in the middle and low temperature region, an ethane pulsating heat pipe was designed, and the low-temperature Stirling refrigerator was used as the cold source. The effects of heating power and inclination angle on the heat transfer performance of ethane pulsating heat pipe were studied experimentally in different temperature regions. The results showed that in the temperature region of-40℃ and-70℃, when the inclination angle was less than 45°, the inclination angle had little effect on the heat transfer temperature difference. When the inclination angle was between 45° and 90°, the heat transfer temperature difference significantly increased with the increase of the inclination angle. At a low heating power, the inclination angle had little effect on the heat transfer temperature difference. At a high heating power, the inclination had a great influence on the heat transfer temperature difference. It was also found that under the same inclination angle, with the increase of heating power, the heat transfer temperature difference gradually increased,and the heat transfer resistance showed a tendency to decrease first and then increase.
To study the heat transfer performance of the pulsating heat pipe in the middle and low temperature region, an ethane pulsating heat pipe was designed, and the low-temperature Stirling refrigerator was used as the cold source. The effects of heating power and inclination angle on the heat transfer performance of ethane pulsating heat pipe were studied experimentally in different temperature regions. The results showed that in the temperature region of-40℃ and-70℃, when the inclination angle was less than 45°, the inclination angle had little effect on the heat transfer temperature difference. When the inclination angle was between 45° and 90°, the heat transfer temperature difference significantly increased with the increase of the inclination angle. At a low heating power, the inclination angle had little effect on the heat transfer temperature difference. At a high heating power, the inclination had a great influence on the heat transfer temperature difference. It was also found that under the same inclination angle, with the increase of heating power, the heat transfer temperature difference gradually increased,and the heat transfer resistance showed a tendency to decrease first and then increase.
引文
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[27] Nazari M A, Ahmadi M H, Ghasempour R. A review on pulsating heat pipes:from solar to cryogenic applications[J]. Appl. Energy,2018, 222(14):475-484.
[28] Han H, Cui X Y, Zhu Y, et al. A comparative study of the behavior of working fluids and their properties on the performance of pulsating heat pipes(PHP)[J]. Int. J. Therm. Sci., 2014, 82(8):138-147.
[29] Tong B Y, Wong T N, Ooi K T. Closed-loop pulsating heat pipe[J]. Appl. Therm. Eng., 2001, 21(18):1845-1862.
[30]胡建军,徐进良.汞-水混合工质脉动热管实验研究[J].化工学报, 2008, 59(5):1083-1090.Hu J J, Xu J L. Experimental study on pulsating heat pipe with mercury-water mixed working fluid[J]. Journal of Chemical Industry and Engineering(China), 2008, 59(5):1083-1090.
[2] Noie S H. Heat transfer characteristics of a two-phase closed thermosyphon[J]. Appl. Therm. Eng., 2005, 25(4):495-506.
[3] Qu J, Wu H Y, Wang Q. Experimental investigation of siliconbased micro-pulsating heat pipe for cooling electronics[J].Nanoscale Microscale Thermophys. Eng., 2012, 16(1):37-49.
[4] Han X H, Wang X H, Zheng H C, et al. Review of the development of pulsating heat pipe for heat dissipation[J]. Renew.Sustain. Energy Rev., 2016, 59:692-709.
[5] Supirattanakui P, Rittidech S, Bubphachot B. Application of a closed-loop oscillating heat pipe with check valves(CLOHP/CV)on performance enhancement in air conditioning system[J].Energy Build., 2011, 43(7):1531-1535.
[6] Yang H H, Khandekar S, Groll M. Performance characteristics of pulsating heat pipes as integral thermal spreaders[J]. Int. J.Therm. Sci., 2009, 48(4):815-824.
[7] Charoensawan P, Terdtoon P. Thermal performance of horizontal closed-loop oscillating heat pipes[J]. Appl. Therm. Eng., 2008, 28(5/6):460-466.
[8] Kim B, Li L, Kim J, et al. A study on thermal performance of parallel connected pulsating heat pipe[J]. Appl. Therm. Eng.,2017, 126(17):1063-1068.
[9] Cui X Y, Qiu Z Q, Weng J H, et al. Heat transfer performance of closed loop pulsating heat pipes with methanol-based binary mixtures[J]. Exp. Therm. Fluid Sci., 2016, 76(7):253-263.
[10] Vassilev M, Avenas Y, Schaeffer C, et al. Experimental study of a pulsating heat pipe with combined circular and square section channels[R]. New Orleans, LA, 2007.
[11] Shafii M B, Faghri A, Zhang Y W. Analysis of heat transfer in unlooped and looped pulsating heat pipes[J]. Int. J. Numer.Methods Heat. Fluid Flow, 2002, 12(5):585-609.
[12] Kim J S, Bui N H, Jung H S, et al. The study on pressure oscillation and heat transfer characteristics of oscillating capillary tube heat pipe[J]. Journal of Mechanical Science and Technology,2003, 17(10):1533-1542.
[13] Rahman M L, Afrose T, Tahmina H K, et al. Effect of using acetone and distilled water on the performance of open loop pulsating heat pipe(OLPHP)with different filling ratios[J]. AIP Conference Proceedings, 2016, 1754(1):1-8.
[14] Xu D, Li L F, Liu H M. Experimental investigation on the thermal performance of helium based cryogenic pulsating heat pipe[J].Exp. Therm. Fluid Sci., 2016, 70(1):61-68.
[15] Xue Z H, Qu W. Experimental study on effect of inclination angles to ammonia pulsating heat pipe[J]. Chinese Journal of Aeronautics, 2014, 27(5):1122-1127.
[16] Paudel S B, Michna G J. Effect of inclination angle on pulsating heat pipe performance[R]. Chicago, Illinois, USA, 2014.
[17]屈健,彭友权,孙芹.带平板蒸发器的紧凑型三维脉动热管传热特性[J].化工学报, 2018, 69(7):2899-2907.Qu J, Peng Y Q, Sun Q. Heat transfer characteristics of compact three-dimensional pulsating heat pipe with flat evaporator[J].CIESC Journal, 2018, 69(7):2899-2907.
[18] Hu C F, Jia L. Experimental study on the start up performance of flat plate pulsating heat pipe[J]. J. Therm. Sci., 2011, 20(2):150-154.
[19] Jang D S, Chung H J, Jeon Y, et al. Thermal performance characteristics of a pulsating heat pipe at various nonuniform heating conditions[J]. Int. J. Heat Mass Transf., 2018, 126(12):855-863.
[20] Chen X, Shao S, Xiang J J, et al. Experimental investigation on ethane pulsating heat pipe based on Stirling cooler[J]. Int. J.Refrig., 2018, 88(4):506-515.
[21] Rahman M L, Sultan R A, Islam T, et al. An experimental investigation on the effect of fin in the performance of closed loop pulsating heat pipe(CLPHP)[J]. Procedia Eng., 2015, 105(7):137-144.
[22] Xian H, Xu W, Zhang Y, et al. Thermal characteristics and flow patterns of oscillating heat pipe with pulse heating[J]. Int. J. Heat Mass Transf., 2014, 79(12):332-341.
[23] Baitule D A, Pachghare P R. Experimental analysis of closed loop pulsating heat pipe with variable filling ratio[J]. Int. J. Mech. Eng.Robot. Res., 2013, 2(3):113-121.
[24] Liang Q, Li Y, Wang Q. Experimental investigation on the performance of a neon cryogenic oscillating heat pipe[J].Cryogenics, 2017, 84(4):7-12.
[25] Fonseca L D, Miller F, Pfotenhauer J. Experimental heat transfer analysis of a cryogenic nitrogen pulsating heat Pipe at various liquid fill ratios[J]. Appl. Therm. Eng., 2018, 130(3):343-353.
[26] Sun X, Pfotenhauer J, Jiao B, et al. Investigation on the temperature dependence of filling ratio in cryogenic pulsating heat pipes[J]. Int. J. Heat Mass Transf., 2018, 126(12):237-244.
[27] Nazari M A, Ahmadi M H, Ghasempour R. A review on pulsating heat pipes:from solar to cryogenic applications[J]. Appl. Energy,2018, 222(14):475-484.
[28] Han H, Cui X Y, Zhu Y, et al. A comparative study of the behavior of working fluids and their properties on the performance of pulsating heat pipes(PHP)[J]. Int. J. Therm. Sci., 2014, 82(8):138-147.
[29] Tong B Y, Wong T N, Ooi K T. Closed-loop pulsating heat pipe[J]. Appl. Therm. Eng., 2001, 21(18):1845-1862.
[30]胡建军,徐进良.汞-水混合工质脉动热管实验研究[J].化工学报, 2008, 59(5):1083-1090.Hu J J, Xu J L. Experimental study on pulsating heat pipe with mercury-water mixed working fluid[J]. Journal of Chemical Industry and Engineering(China), 2008, 59(5):1083-1090.
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