Supercooling characteristics of a mannitol based phase change system under a ultrasonic action

doi:10.12028/j.issn.2095-4239.2018.0224

Abstract

Abstract: The mannitol based phase change material has phase transition temperature of 2-3℃ required for micro-frozen storage of aquatic products. Such a material has an issue of supercooling. This article aims to understand the supercooling characteristics of mannitol based phase change system under an ultrasonic action from both single and double external fields. The sound pressure model under the action of an external ultrasonic field and the associated influence on the supercooling characteristics of phase change solution were discussed. An experimental system for studying the supercooling characteristics of the phase change system was constructed. It was found that the cavitation effect caused by ultrasonic waves can change the degree of subcooling of the mannitol based phase change system. The supercooling degree of the 3% mannitol based phase change system and the mannitol phase change system containing K₂SO₄ decreased first and then increased with an increase in the ultrasonic power. When the ultrasonic power was too high, the use of cavitation bubbles would reduce the cavitation effect, leading to an increased the degree of supercooling. The K₂SO₄-containing mannitol phase change system showed the best effect under a double ultrasonic field of 150W+150W. When the concentration of K₂SO₄ was 1%, the degree of supercooling was 0.8℃. For the carbon nanotube water dispersant (TNWDIS) mannitol phase change nanofluid, a 50W+50W double ultrasonic external field effect was optimal at a MWCNT concentration of 0.4% and 0.5%, with a supercooling degree of only 0.1℃.

Key words: mannitol, supercooling, nucleating agent, ultrasonic power

CLC Number:

TK02

LIU Lum, ZHANG Xuelai, CHEN Yue, ZHANG Yongyichuan. Supercooling characteristics of a mannitol based phase change system under a ultrasonic action[J]. Energy Storage Science and Technology, 2019, 8(2): 326-332.

References

[1] ZALBA B, MARIN J M, CABEZA L F, et al. Review on thermal energy storage with phase change:materials, heat transfer analysis and applications[J]. Appl. Therm. Eng., 2003, 23(3):251
[2] 杨波, 李汛, 赵军. 移动蓄热技术的研究进展[J]. 化工进展, 2013, 32(3):515-520.
[3] 王大伟. 国内冷链物流行业发展现状及趋势[J]. 重型汽车, 2016(4):44-45.
[4] HASAN M I, BASHIR H O, Shadhan A O. Experimental investigation of phase changematerials for insulation of residential buildings[J]. Sustainable Cities & Society, 2018, 36(10):42-58.
[5] LAAOUATNI A, MARTAJ N, BENNACER R, et al. Phase change materials for improving the building thermal inertia[J]. Energy Procedia, 2017,139(11):744-749.
[6] JIA J, LEE W L. Experimental investigations on using phase change material for performance improvement of storage-enhanced heat recovery room air-conditioner[J]. Energy, 2015, 93:1394-1403.
[7] 杨宁, 王瑾, 柳建华, 等. 一种添加纳米颗粒的共晶盐空调蓄冷材料实验研究[J]. 建筑节能, 2017, 45(1):10-13.
[8] MALVI C S, DIXON-HARDY D W, CROOK R. Energy balance model of combined photovoltaic solarthermal system incorporating phase change material[J]. Solar Energy, 2011, 85(7):1440-1446.
[9] SU D, JIA Y, LIN Y, et al. Maximizing the energy output of a photovoltaic thermal solar collector incorporating phase change materials[J]. Energy & Buildings, 2017, 153(8):382-391.
[10] CARSON J K, EAST A R. The cold chain in New Zealand-A review[J]. International Journal of Refrigeration, 2017, 87(9):185-192.
[11] HOANG H M, LEDUCQ D, PEREZ M R, et al.Heat transfer study of submicro-encapsulated PCM plate for food packaging application[J]. International Journal of Refrigeration, 2015, 52(4):151-160.
[12] 潘欣. 食品相变蓄冷剂的研制[D]. 杭州:浙江大学, 2005.
[13] 谢晶. 食品冷藏链技术与装置[M]. 北京:机械工业出版社, 2010.
[14] 曾翠华, 张仁元.无机水合盐相变储热材料的过冷性研究[J].能源研究与信息, 2005, 21(1):44-49.
[15] 盛强, 邢玉明, 王泽. 成核剂对八水氢氧化钡相变材料过冷度的影响[J]. 化工新型材料, 2015(2):100-102.
[16] 蔡树棠, 刘一心. 热力学理论与空化现象[J]. 应用数学和力学, 1983, 4(6):737-742.
[17] HICKLING R. Nucleation of freezing by cavity collapse and its relation to cavitation damage[J]. Nature, 1965, 206(4987):915-917.
[18] HUNT J D, JACKSON K A. Nucleation of solid in an undercooled liquid by cavitation[J]. Journal of Applied Physics, 1966, 37(1):254-257.
[19] KIANI H, ZHANG Z, DELGADO A, et al. Ultrasound assisted nucleation of some liquid and solid model foods during freezing[J]. Food Research International, 2011, 44(9):2915-2921.
[20] KIANI H, SUN D W, DELGADO A, et al. Investigation of the effect of power ultrasound on the nucleation of water during freezing of agar gel samples in tubing vials[J]. Ultrasonics Sonochemistry, 2012, 19(3):576-581.