مدل‌سازی عددی تأثیر ساختار متخلخل ترکیبی بر عملکرد حرارتی لوله گرمایی تخت نازک

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشکده مهندسی هوافضا، دانشگاه صنعتی امیرکبیر

2 صنعتی امیرکبیر*مهندسی هوافضا

3 پژوهشگر پژوهشگاه فضایی، پژوهشکده سامانه‌های ماهواره، پژوهشگاه فضایی ایران

4 پژوهشگر پژوهشگاه فضایی، پژوهشکده سامانه‌های ماهواره، پژوهشگاه فضایی ایران، تهران، ایران

5 صنعتی امیرکبیر * هوافضا

چکیده

با توجه به محدودیت حجمی و جرمی دستگاه‌های الکترونیکی کوچک، لوله‌های گرمایی تخت نازک یک راه‌حل ایده‌آل برای کنترل کارآمد انتقال و اتلاف حرارت هستند. عملکرد لوله‌های گرمایی نازک به شدت به مشخصات ناحیه متخلخل وابسته است. در این پژوهش، عملکرد حرارتی لوله‌‌‌های گرمایی تخت نازک با فتیله‌های ترکیبی و شیاردار برای شارهای گرمایی ورودی 2/5 تا 30 وات به صورت عددی مورد مطالعه و با یکدیگر مقایسه شدند. همچنین پارامترهای مؤثر مختلف بر عملکرد حرارتی آن‌ها مانند دمای دیوار، بیشینه سرعت محوری، انتقال جرم در سطح مشترک مایع-بخار، فشار سیستم و مقاومت حرارتی تجزیه و تحلیل شدند. شبیه‌سازی عددی به صورت دوبعدی، ناپایا، تراکم‌ناپذیر و آرام انجام شده است. نتایج به‌دست آمده نشان داد که دمای بخش تبخیرکننده لوله گرمایی با فتیله ترکیبی به طور قابل توجهی کمتر از مقدار مربوط به لوله گرمایی با فتیله شیاردار است. همچنین مشاهده شد که با افزایش شار گرمایی ورودی، مقاومت حرارتی لوله گرمایی با فتیله ترکیبی کاهش یافته و نسبت به فتیله شیاردار عملکردی بسیار مناسبی دارد. برای شارهای گرمایی 10، 20 و 30 وات عملکرد لوله گرمایی با فتیله ترکیبی نسبت به فتیله شیاردار به ترتیب3/59، 20/38 و 28/57 درصد بهبود می‌یابد. بنابراین ساختار فتیله ترکیبی می‌تواند عملکرد لوله گرمایی را بهبود بخشد و میزان این بهبود در شارهای گرمایی بالا، قابل توجه است.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Numerical Investigation of Hybrid Wick Structure Effect on Thermal Performance of a Thin Flat Heat Pipe

نویسندگان [English]

  • Gholamreza Abdizadeh 1
  • sahar noori 2
  • Hamid Reza Tajik 3
  • Mehran Shahryari 4
  • Mohammad Saeedi 5
1 Department of Aerospace Engineering, Amirkabir University of Technology, Tehran, Iran
3 Satellite Research Institute, Iranian Space Research Center, Tehran, Iran
4 Satellite Research Institute, Iranian Space Research Center, Tehran, Iran
5 Assistant Professor, Department of Aerospace Engineering, Amirkabir University of Technology, Tehran, Iran
چکیده [English]

Due to the volume and mass limits of the small electronic devices, thin flat heat pipes are an ideal solution for the efficient transfer and dissipation of heat. The performance of thin heat pipes is heavily dependent on wick structure characteristics. In this research, the thermal performance of thin flat heat pipes with hybrid and grooved wick for different heat inputs were studied numerically, and their heat transfer characteristics were compared. The trends of various parameters such as wall temperature, maximum axial velocity, mass transfer at the liquid-vapor interface, system pressure, and thermal resistance on the thermal performance of the thin flat heat pipe with hybrid and groove wicks were analyzed. The numerical simulation has been done using a two‐dimensional unsteady incompressible laminar flow. Results indicated that the evaporation section temperature of hybrid wick thin flat heat pipe is significantly lower than the corresponding value of grooves heat pipe. It was also observed that with increasing heat input, the thermal resistance of hybrid wick thin flat heat pipe decreased and it has excellent performance compared to the grooved wick. For heat fluxes of 10, 20, and 30 W, the performance of the thin flat heat pipe with hybrid wick compared to grooved wick is improved by 3.59%, 20.38%, and 28.57%, respectively. Therefore, the thermal performance improvement of the thin flat heat pipe with the hybrid wick was more significant. This improvement is more considerable for higher heat fluxes.

کلیدواژه‌ها [English]

  • Flat Heat Pipe
  • Hybrid wick
  • evaporation
  • Phase change
  • High heat flux
[1] A. Faghri, Review and advances in heat pipe science and technology, Journal of heat transfer, 134(12) (2012).
[2] Y. Yau, M. Ahmadzadehtalatapeh, A review on the application of horizontal heat pipe heat exchangers in air conditioning systems in the tropics, Applied Thermal Engineering, 30(2-3) (2010) 77-84.
[3] T. Brahim, M.H. Dhaou, A. Jemni, Theoretical and experimental investigation of plate screen mesh heat pipe solar collector, Energy conversion and management, 87 (2014) 428-438.
[4] Y. Tang, X. Ding, B. Yu, Z. Li, B. Liu, A high power LED device with chips directly mounted on heat pipes, Applied thermal engineering, 66(1-2) (2014) 632-639.
[5] D. Liu, F.-Y. Zhao, H.-X. Yang, G.-F. Tang, Thermoelectric mini cooler coupled with micro thermosiphon for CPU cooling system, Energy, 83 (2015) 29-36.
[6] Y. Liu, X. Yang, J. Li, X. Zhao, Energy savings of hybrid dew-point evaporative cooler and micro-channel separated heat pipe cooling systems for computer data centers, Energy, 163 (2018) 629-640.
[7] J. Qu, H. Wu, P. Cheng, Q. Wang, Q. Sun, Recent advances in MEMS-based micro heat pipes, International Journal of Heat and Mass Transfer, 110 (2017) 294-313.
[8] D.W. Hengeveld, M.M. Mathison, J.E. Braun, E.A. Groll, A.D. Williams, Review of modern spacecraft thermal control technologies, HVAC&R Research, 16(2) (2010) 189-220.
[9] Y. Nakamura, K. Nishijo, N. Murakami, K. Kawashima, Y. Horikawa, K. Yamamoto, T. Ohtani, Y. Takhashi, K. Inoue, Small demonstration satellite-4 (SDS-4): development, flight results, and lessons learned in JAXA’s microsatellite project,  (2013).
[10] S.A. Isaacs, C. Lapointe, P.E. Hamlington, Development and Application of a Thin Flat Heat Pipe Design Optimization Tool for Small Satellite Systems, Journal of Electronic Packaging, 143(1) (2020).
[11] H. Tang, L. Lian, J. Zhang, Y. Liu, Heat transfer performance of cylindrical heat pipes with axially graded wick at anti-gravity orientations, Applied Thermal Engineering, 163 (2019) 114413.
[12] X. Huang, G. Franchi, Design and fabrication of hybrid bi-modal wick structure for heat pipe application, Journal of Porous Materials, 15(6) (2008) 635-642.
[13] S.-C. Shen, H.J. Huang, J.C. Hsieh, J.K. Tseng, C.T. Pan, H.-J. Shaw, Design and processing of novel hybrid structure tubular heat pipe for photoelectric components, Journal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers, Series C/Chung-Kuo Chi Hsueh Kung Ch'eng Hsuebo Pao, 30(6) (2009) 519-525.
[14] L. Jiang, Y. Huang, Y. Tang, Y. Li, W. Zhou, L. Jiang, J. Gao, Fabrication and thermal performance of porous crack composite wick flattened heat pipe, Applied thermal engineering, 66(1-2) (2014) 140-147.
[15] N. Sangpab, N. Kimura, P. Terdtoon, P. Sakulchangsatjatai, N. Kammuang-lue, M. Murakami, Combined effect of bending and flattening on heat transfer performance of cryogenic sintered-wick heat pipe, Applied Thermal Engineering, 148 (2019) 878-885.
[16] W. Zhou, P. Xie, Y. Li, Y. Yan, B. Li, Thermal performance of ultra-thin flattened heat pipes, Applied Thermal Engineering, 117 (2017) 773-781.
[17] Y. Li, W. Zhou, J. He, Y. Yan, B. Li, Z. Zeng, Thermal performance of ultra-thin flattened heat pipes with composite wick structure, Applied Thermal Engineering, 102 (2016) 487-499.
[18] W. Zhou, Y. Li, Z. Chen, L. Deng, B. Li, Experimental study on the heat transfer performance of ultra-thin flattened heat pipe with hybrid spiral woven mesh wick structure, Applied Thermal Engineering, 170 (2020) 115009.
[19] D. Wang, J. Wang, X. Bao, G. Chen, H. Chu, Evaporation heat transfer characteristics of composite porous wick with spherical-dendritic powders, Applied Thermal Engineering, 152 (2019) 825-834.
[20] S. Sudhakar, J.A. Weibel, F. Zhou, E.M. Dede, S.V. Garimella, Area-scalable high-heat-flux dissipation at low thermal resistance using a capillary-fed two-layer evaporator wick, International Journal of Heat and Mass Transfer, 135 (2019) 1346-1356.
[21] M. Famouri, G. Carbajal, C. Li, Transient analysis of heat transfer and fluid flow in a polymer-based micro flat heat pipe with hybrid wicks, International Journal of Heat and Mass Transfer, 70 (2014) 545-555.
[22] S.A. Isaacs, D.A. Arias, D. Hengeveld, P.E. Hamlington, Experimental development and computational optimization of flat heat pipes for cubesat applications, Journal of Electronic Packaging, 139(2) (2017).
[23] T. Naemsai, N. Kammuang-lue, P. Terdtoon, P. Sakulchangsatjatai, Numerical model of heat transfer characteristics for sintered-grooved wick heat pipes under non-uniform heat loads, Applied Thermal Engineering, 148 (2019) 886-896.
[24] K. Zeghari, H. Louahlia, S. Le Masson, Experimental investigation of flat porous heat pipe for cooling TV box electronic chips, Applied Thermal Engineering, 163 (2019) 114267.
[25] C. Oshman, B. Shi, C. Li, R. Yang, Y. Lee, G. Peterson, V.M. Bright, The development of polymer-based flat heat pipes, Journal of Microelectromechanical Systems, 20(2) (2011) 410-417.
[26] C. Li, G. Peterson, The effective thermal conductivity of wire screen, International Journal of Heat and Mass Transfer, 49(21-22) (2006) 4095-4105.
[27] U. Vadakkan, J.Y. Murthy, S.V. Garimella, Transient analysis of flat heat pipes, in:  Heat Transfer Summer Conference, 2003, pp. 507-517.
[28] J. Rice, A. Faghri, Analysis of screen wick heat pipes, including capillary dry-out limitations, Journal of thermophysics and heat transfer, 21(3) (2007) 475-486.
[29] L. Rayleigh, LVI. On the influence of obstacles arranged in rectangular order upon the properties of a medium, The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science, 34(211) (1892) 481-502.
[30] W. Zhou, Y. Li, Z. Chen, L. Deng, Y. Gan, A novel ultra-thin flattened heat pipe with biporous spiral woven mesh wick for cooling electronic devices, Energy Conversion and Management, 180 (2019) 769-783.
[31] U. Vadakkan, S.V. Garimella, J.Y. Murthy, Transport in flat heat pipes at high heat fluxes from multiple discrete sources, J. Heat Transfer, 126(3) (2004) 347-354.
[32] B. Zohuri, Heat pipe design and technology, FL: Taylor and Francis Group, LLC,  (2011).