Experimental investigation and quasi-steady modeling of nucleate boiling in mini-channel thermosyphons

被引:1
作者
Scheiff, V. [1 ,2 ]
Yada, S. [2 ]
Fdhila, R. Bel [1 ,2 ]
机构
[1] Malardalen Univ, Vasteras, Sweden
[2] Hitachi Energy Res, Forskargrand 7, SE-72178 Vasteras, Sweden
关键词
Thermosyphons; Evaporation; Boiling phenomenon; Power control; Quasi-steady state; HEAT-TRANSFER; LOOP; FLOW; PERFORMANCE;
D O I
10.1016/j.applthermaleng.2024.124033
中图分类号
O414.1 [热力学];
学科分类号
摘要
This study explores the understanding of two-phase cooling in thermosyphons using a quasi-steady state methodology during the boiling process. A thermosyphon is built as a passive loop to dissipate heat with an evaporator and a condenser. The evaporator is made of multiple mini channels (hydraulic diameter of 1.54 mm, length of 260 mm with 7 x 2 internal ports for a Confinement number of 0.55) with HFO-1336mzz(E) as the working fluid. Different heat loads (500 - 4000 W) are generated directly on the external contact surface of the evaporator to create all the different stages of boiling, from monophasic regime to steady nucleate boiling with the Onset of Nucleate Boiling transition. The temperature evolution inside the evaporator is measured at different heights and compared with a theoretical assumption of a quasi-steady state. A characteristic time depending on critical factors such as thermal mass is determined to model the temperature during a generated heat load. A good agreement between experimental measurements and the quasi-steady model is shown. Thus, this study emphasizes tracking the temperature evolution over time within the system. This dynamic perspective offers a nuanced understanding of the system's response to varying heat inputs, transient phases, and the onset of boiling. This characterized local behavior provides an original insight into the boiling appearing inside mini- channels. It is shown that boiling is initiated by nucleation at a few specific sites and then propagates up to a critical length due to high vapor generation, introducing a thermal lag during the boiling incipience.
引用
收藏
页数:17
相关论文
共 41 条
[1]   A Helmholtz Energy Equation of State for trans-1,1,1,4,4,4-Hexafluoro-2-butene [R-1336mzz(E)] and an Auxiliary Extended Corresponding States Model for the Transport Properties [J].
Akasaka, Ryo ;
Huber, Marcia L. ;
Simoni, Luke D. ;
Lemmon, Eric W. .
INTERNATIONAL JOURNAL OF THERMOPHYSICS, 2023, 44 (04)
[2]   Experimental parameter studies on a two-phase loop thermosyphon cooling system with R1233zd(E) and R1224yd(Z) [J].
Albertsen, Bjorn ;
Schmitz, Gerhard .
INTERNATIONAL JOURNAL OF REFRIGERATION, 2021, 131 :146-156
[3]   Turbulent flow and transient convection in a semi-annular duct [J].
Baudin, N. ;
Colin, C. ;
Ruyer, P. ;
Sebilleau, J. .
INTERNATIONAL JOURNAL OF THERMAL SCIENCES, 2016, 108 :40-51
[4]  
Berthoud G., 2006, Etude du Flux Critique en Chauffage Transitoire, Note Technique
[5]   Improvement of thermosyphon performance by employing nanofluid [J].
Buschmann, Matthias H. ;
Franzke, Uwe .
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID, 2014, 40 :416-428
[6]   Research on the refrigerant column height in the downcomer of a two-phase loop thermosyphon [J].
Cao, Hanwen ;
Ding, Tao ;
He, Zhiguang ;
Li, Zhen .
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID, 2018, 94 :40-48
[7]   A review on independent and integrated/coupled two-phase loop thermosyphons [J].
Cao, Jingyu ;
Zheng, Zhanying ;
Asim, Muhammad ;
Hu, Mingke ;
Wang, Qiliang ;
Su, Yuehong ;
Pei, Gang ;
Leung, Michael K. H. .
APPLIED ENERGY, 2020, 280
[8]   Loop thermosyphon performance study for solar cells cooling [J].
Chen, Shaojie ;
Yang, Jun .
ENERGY CONVERSION AND MANAGEMENT, 2016, 121 :297-304
[9]   High Heat Flux Cooling Technologies Using Microchannel Evaporators: Fundamentals and Challenges [J].
Cheng, Lixin ;
Xia, Guodong .
HEAT TRANSFER ENGINEERING, 2023, 44 (16-18) :1470-1497
[10]   Principles of loop thermosyphon and its application in data center cooling systems: A review [J].
Ding, Tao ;
Chen, Xiaoxuan ;
Cao, Hanwen ;
He, Zhiguang ;
Wang, Jianmin ;
Li, Zhen .
RENEWABLE & SUSTAINABLE ENERGY REVIEWS, 2021, 150