Experimental Study on the Heat Storage and Release of the Solid-Liquid Phase Change in Metal-Foam-Filled Tube

doi:10.19799/j.cnki.2095-4239.2021.0422

Abstract

Abstract:

To solve the key problems of unstable, discontinuous, and uneven radiation intensity in the process of solar heat utilization, phase change heat storage technology and solar heat utilization system are commonly synergized and coupled to achieve a stable and continuous heat output. To enhance the solid-liquid thermal storage/release process and improve the efficiency of thermal storage, the solid-liquid thermal storage/release characteristics of phase change materials (PCMs) (paraffin) in metal foam were experimentally studied at different temperatures of a heat transfer fluid. An experimental system for phase interface visualization was designed and built. During the experiment, a high-definition camera was set to record the phase interface changes during the melting and solidification phase change. By arranging multiple thermocouple measuring points inside the heat storage unit, the law of temperature change during the heat storage/release process was explored. The experimental results demonstrated that, under the influence of natural convection, the phase interface changed from top to bottom during the melting process. In the solidification process, the lower part of the heat storage unit had a lower temperature. Natural convection occurred merely at the beginning, and heat conduction dominated the whole solidification phase change. The phase interface moved from bottom to top with time elapsed. The higher the melting temperature was, the shorter the time required for melting was. Compared with the cases with a heat transfer fluid temperature of 65 ℃, the complete melting time at the heat transfer fluid temperatures of 85 ℃, 80 ℃, 75 ℃, and 70 ℃ was reduced by 56.0%, 46.7%, 15.4%, and 26.7%, respectively. The internal temperature of the PCM exhibited a distinct temperature rise when different heat storage temperatures were set. However, at the same cooling temperature for heat release, the law of temperature variation for the PCM tended to be the same.

Key words: heat storage and release, metal foam, melting temperature, phase interface, temperature change

CLC Number:

TK 124

Zhao DU, Kang YANG, Gao SHU, Pan WEI, Xiaohu YANG. Experimental Study on the Heat Storage and Release of the Solid-Liquid Phase Change in Metal-Foam-Filled Tube[J]. Energy Storage Science and Technology, 2022, 11(2): 531-537.

Figures/Tables 6

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References 19

1	TAO Y B, HE Y L. A review of phase change material and performance enhancement method for latent heat storage system[J]. Renewable and Sustainable Energy Reviews, 2018, 93: 245-259.
2	喻彩梅, 章学来, 华维三. 十水硫酸钠相变储能材料研究进展[J]. 储能科学与技术, 2021, 10(3): 1016-1024.
	YU C M, ZHANG X L, HUA W S. Research progress of sodium sulfate decahydrate phase changematerial[J]. Energy Storage Science and Technology, 2021, 10(3): 1016-1024.
3	王君雷, 徐祥贵, 孙通, 等. 一种螺旋翅片式相变储热单元的储热优化模拟[J]. 储能科学与技术, 2021, 10(2): 514-522.
	WANG J L, XU X G, SUN T, et al. Simulation of heat storage process in spiral fin phase change heat storage unit[J]. Energy Storage Science and Technology, 2021, 10(2): 514-522.
4	杨绪青, 余真珠, 杨肖虎, 等. 压缩空气储能与吸收式热泵循环集成的热电联产系统[J]. 储能科学与技术, 2021, 10(1): 362-369.
	YANG X Q, YU Z Z, YANG X H, et al. Combined heating and power system coupled with compressed air energy storage and absorption heat pump cycle[J]. Energy Storage Science and Technology, 2021, 10(1): 362-369.
5	盛鹏, 徐丽, 赵广耀, 等. 新型混合硝酸熔盐的制备及热物性研究[J]. 储能科学与技术, 2021, 10(1): 170-176.
	SHENG P, XU L, ZHAO G Y, et al. Preparation and thermophysical properties of novel mixed nitrate molten salts[J]. Energy Storage Science and Technology, 2021, 10(1): 170-176.
6	王赛, 孙志高, 李娟, 等. 月桂酸/十四醇/二氧化硅定形相变材料的制备及性能研究[J]. 储能科学与技术, 2020, 9(6): 1768-1774.
	WANG S, SUN Z G, LI J, et al. Preparation and properties of lauric acid/tetradecanol/SiO₂ shape-stabilized phase change materials[J]. Energy Storage Science and Technology, 2020, 9(6): 1768-1774.
7	SIAHPUSH A, O'BRIEN J, CREPEAU J. Phase change heat transfer enhancement using copper porous foam[J]. Journal of Heat Transfer, 2008, 130(8): 082301.
8	CUI H T. Experimental investigation on the heat charging process by paraffin filled with high porosity copper foam[J]. Applied Thermal Engineering, 2012, 39: 26-28.
9	张嘉杰, 屈治国. 金属泡沫中填充石蜡的相变换热特性实验研究[J]. 工程热物理学报, 2017, 38(7): 1441-1446.
	ZHANG J J, QU Z G. Experimental study on the heat transfer of metal foam filled in paraffin[J]. Journal of Engineering Thermophysics, 2017, 38(7): 1441-1446.
10	田伟, 梁晓光, 党硕, 等. 金属泡沫-翅片复合结构强化相变蓄热的实验研究[J]. 西安交通大学学报, 2021, 55(11): 17-24.
	TIAN W, LIANG X G, DANG S, et al. Visualized experimental study on the phase change heat storage enhanced with metal foam[J]. Journal of Xi'an Jiaotong University, 2021, 55(11): 17-24.
11	ZHANG P, MENG Z N, ZHU H, et al. Melting heat transfer characteristics of a composite phase change material fabricated by paraffin and metal foam[J]. Applied Energy, 2017, 185: 1971-1983.
12	杨佳霖, 杜小泽, 杨立军, 等. 泡沫金属强化石蜡相变蓄热过程可视化实验[J]. 化工学报, 2015, 66(2): 497-503.
	YANG J L, DU X Z, YANG L J, et al. Visualized experiment on dynamic thermal behavior of phase change material in metal foam[J]. CIESC Journal, 2015, 66(2): 497-503.
13	CHEN Z Q, GAO D Y, SHI J. Experimental and numerical study on melting of phase change materials in metal foams at pore scale[J]. International Journal of Heat and Mass Transfer, 2014, 72: 646-655.
14	韦攀, 喻家帮, 郭增旭, 等. 环形管填充金属泡沫强化相变蓄热可视化实验[J]. 化工学报, 2019, 70(3): 850-856.
	WEI P, YU J B, GUO Z X, et al. Experimental visualization on thermal energy storage enhancement through metal foam filled annuli[J]. CIESC Journal, 2019, 70(3): 850-856.
15	陈岩, 叶宇轩, 杜文静. 泡沫金属在熔盐相变蓄热中的强化传热特性[J]. 化工进展, 2020, 39(7): 2566-2573.
	CHEN Y, YE Y X, DU W J. Heat transfer enhancement performance in phase change process of molten salt using foam metal[J]. Chemical Industry and Engineering Progress, 2020, 39(7): 2566-2573.
16	徐众, 侯静, 万书权, 等. 金属泡沫/石蜡复合相变材料的制备及热性能研究[J]. 储能科学与技术, 2020, 9(1): 109-116.
	XU Z, HOU J, WAN S Q, et al. Preparation and thermal properties of metal foam/paraffin composite phase change materials[J]. Energy Storage Science and Technology, 2020, 9(1): 109-116.
17	张斌, 金东范, 卢天健. 非均质材料凝固过程分析——理论和实验[J]. 中国科学(E辑: 技术科学), 2009, 39(2): 206-213.
18	宋瀚文, 王子龙, 闫勤学, 等. 石蜡-铜泡沫复合相变蓄热材料热特性的研究[J]. 功能材料, 2021, 52(6): 6102-6109.
	SONG H W, WANG Z L, YAN Q X, et al. Study on thermal characteristics ofparaffin/metal foam composite PCMs[J]. Journal of Functional Materials, 2021, 52(6): 6102-6109.
19	王帅, 彭常宏, 郭赟. 圆柱腔内石蜡熔化过程实验探究[J]. 核技术, 2016, 39(9): 79-85.
	WANG S, PENG C H, GUO Y. Experimental study on paraffin melting in a cylindrical cavity[J]. Nuclear Techniques, 2016, 39(9): 79-85.

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