不同球径的多孔球层内无机盐溶液过冷度的实验研究

doi:10.11949/j.issn.0438-1157.20171063

摘要/Abstract

摘要：

无机盐溶液的过冷度极大地影响了相变材料的蓄冷特性。实验以NH₄Cl溶液为例，研究了浓度与多孔介质对无机盐溶液的过冷度影响机理。通过改变无机盐溶液浓度与构建多孔介质小球的球径，探究无机盐溶液强化传热传质的方法。实验结果表明：浓度越高，无机盐溶液过冷度越低，离散程度越低，稳定性越高。当浓度达到15%时，溶液平均过冷度较5%浓度溶液可降低17.5%。构建多孔介质小球球径越小，无机盐溶液过冷度越低，离散程度越低，稳定性越高。当球径为5 mm时，溶液平均过冷度较无多孔介质情况下可降低21.7%。

关键词: 过冷度, 多孔介质, 浓度, 无机盐溶液, 氯化铵溶液

Abstract:

The supercooling degree of inorganic salt solution has great effect on the characteristic of the phase change meterials in cool storage. Ammonium chloride solution was chosen as a kind of inorganic salt solution, the experimental system was built to study the influence on supercooling degree of inorganic salt solution under the effection of concentration and porous media. The method of heat transfer enhancement was studied by changing the concentration of inorganic salt solution and the diameter of balls which is constituting the porous media. The experimental results show that with the increase of concentration, the value of inorganic salt solution's supercooling degree and dispersion degree reduced, while the stability increased. Compared with the ammonium chloride solution at the concentration of 5%, the supercooling degree decreased 17.5% when the concentration of chloride solution reached 15%. With the decrease of the diameter of balls which is constituting the porous media, the average value of chloride solution's supercooling degree and dispersion degree decreased, while the stability increased. Compared with the ammonium chloride solution without porous media, the average value of chloride solution's supercooling degree decreased 21.7% when the diameter of balls was 5 mm.

Key words: supercooling degree, porous media, concentration, inorganic salt solution, ammonium chloride solution

中图分类号:

TK02

徐笑锋, 章学来, 陈跃, 陈启杨, 李玉洋. 不同球径的多孔球层内无机盐溶液过冷度的实验研究[J]. 化工学报, 2018, 69(5): 1900-1905.

XU Xiaofeng, ZHANG Xuelai, CHEN Yue, CHEN Qiyang, LI Yuyang. Experimental investigation on inorganic salt solution's supercooling degree under porous spherical layer with different spherical diameters[J]. CIESC Journal, 2018, 69(5): 1900-1905.

参考文献 25

[1]	SAMAN N G, VIKTORIA M, JUSTIN N C. Phase equilibrium in the design of phase change materials for thermal energy storage:state-of-the-art[J]. Renewable and Sustainable Energy Reviews, 2017, 73:558-581.
[2]	RATHOD M K, BANERJEE J. Thermal stability of phase change materials used in latent energy storage systems:a review[J]. Renewable and Sustainable Energy Reviews, 2013, 18:246-258.
[3]	SARIER N, ONDER E. Organic phase change materials and their textile applications:an overview[J]. Thermochimica Acta, 2012, 540:7-60.
[4]	葛文杰, 赵春江. 农业物联网研究与应用现状及发展对策研究[J]. 农业机械学报, 2014, 45(7):222-230, 277. GE W J, ZHAO C J. State-of-the-art and developing strategies of agricultural internet of things[J]. Transactions of the Chinese Society for Agricultural Machinery, 2014, 45(7):222-230, 277.
[5]	黄雪莲, 于新, 马永全. 蓄冷技术在果蔬保鲜中的研究与应用[J]. 仲恺农业技术学院学报, 2010, 23(2):67-71. HUANG X L, YU X, MA Y Q. Study and application of cool storage technology in fruits and vegetables preservation[J]. Journal of Zhongkai University of Agriculture and Engineering, 2010, 23(2):67-71.
[6]	赵春江, 韩佳伟, 杨信廷, 等. 冷链物流研究中的计算流体力学数值模拟技术[J]. 农业机械学报, 2015, 46(3):214-222. ZHAO C J, HAN J W, YANG X T, et al. Digital simulation technology of computational fluid dynamics in agricultural cold-chain logistics applications[J]. Transactions of the Chinese Society for Agricultural Machinery, 2015, 46(3):214-222.
[7]	邸倩倩, 王亚会, 刘斌, 等. 风速对冷藏车内温度分布的影响[J]. 食品科技, 2017, 42(5):46-51. DI Q Q, WANG Y H, LIU B, et al. Effect of wind speed on the temperature of liquid nitrogen refrigerated vehicle[J]. Food Science and Technology, 2017, 42(5):46-51.
[8]	张东霞, 吕恩利, 陆华忠, 等. 保鲜运输车温度场分布特性试验研究[J]. 农业工程学报, 2012, 28(11):254-260. ZHANG D X, LÜ E L, LU H Z, et al. Experimental study on temperature field distribution characteristics in fresh-keeping transportation[J]. Transactions of the Chinese Society of Agricultural Engineering(Transactions of CSAE), 2012, 28(11):254-260.
[9]	赵春江, 韩佳伟, 杨信廷, 等. 基于CFD的冷藏车车厢内部温度场空间分布数值模拟[J]. 农业机械学报, 2013, 44(11):168-173. ZHAO C J, HAN J W, YANG X T, et al. Numerical simulation of temperature field distribution in refrigerated truck based on CFD[J]. Transactions of the Chinese Society of Agricultural Machinery, 2013, 44(11):168-173.
[10]	韩佳伟, 赵春江, 杨信廷, 等. 基于CFD数值模拟的冷藏车节能组合方式比较[J]. 农业工程学报, 2013, 29(19):55-62. HAN J W, ZHAO C J, YANG X T, et al. Comparison of combination mode of energy conservation for refrigerated car based on CFD numerical simulation[J]. Transactions of the Chinese Society of Agricultural Engineering(Transactions of CSAE), 2013, 29(19):55-62.
[11]	TUMIRAH K, HUSSEIN M Z, ZULKARNAIN Z, et al. Nano-encapsulated organic phase change material based on copolymer nanocomposites for thermal energy storage[J]. Energy, 2014, 66(4):881-890.
[12]	陈坤, 洪荣华, 吴杰, 等.低过冷度冰蓄冷溶液的实验研究及节能效益分析[J]. 能源工程, 2015, 1(13):52-55. CHEN K, HONG R H, WU J, et al. Experimental research on low supercooling of ice storage and analysis of its energy saving[J]. Energy Engineering, 2015, 1(13):52-55.
[13]	潘利红, 黄立维, 岳桥, 等. 振动对无机盐相变材料过冷度的影响[J]. 浙江工业大学学报, 2008, 36(6):655-658. PAN L H, HUANG L W, YUE Q, et al. Influence of vibration on the supercooling relex of inorganic salt solution as a phase change materials[J]. Journal of Zhejiang University of Technology, 2008, 36(6):655-658.
[14]	HONG H, PECK J H, KANG C D. Ice adhesion of an aqueous solution including a surfactant with stirring on cooling wall:ethylene glycol-a saline coupling agent aqueous solution[J]. International Journal of Refrigeration-Revue International Du Frond, 2004, 27(8):985-992.
[15]	洪荣华, 孙志坚, 吴杰, 等.成核添加剂减小冰蓄冷溶液过冷度的实验研究[J]. 浙江大学学报(工学版), 2005, 39(11):1797-1800. HONG R H, SUN Z J, WU J, et al. An experimental study on reduce supercooling degree of ice storage solution using nucleation additive[J]. Journal of Zhejiang University (Engineering Science), 2005, 39(11):1797-1800.
[16]	ALIMOHAMMADI M, AGHLI Y, ALAVI E S, et al. Experimental investigation of the effects of using nano/phase change materials (NPCM) as coolant of electronic chipsets, under free and forced convection[J]. Applied Thermal Engineering, 2016, 111:271-279.
[17]	GHOSSEIN R M A, HOSSAIN M S, KHODADADI J M. Experimental determination of temperature-dependent thermal conductivity of solid eicosane-based silver nanostructure-enhanced phase change materials for thermal energy storage[J]. International Journal of Heat and Mass Transfer, 2017, 107:697-711.
[18]	胡玉坤, 丁静. 多孔介质内部传热传质规律的研究进展[J]. 广东化工, 2006, 33(11):44-47. HU Y K, DING J. Study on heat and mass transfer of porous media[J]. Guangdong Chemical Industry, 2006, 33(11):44-47.
[19]	PY X, OLIVES R, MAURA S. Paraffin/porous-graphite-matrix composite as a high and constant power thermal storage material[J]. International Journal of Heat Mass Transfer, 2001, 32(44):2727-2737.
[20]	刘小平, 蒋玉龙, 张素军, 等. 多孔介质非蓄冷板的融化过程[J]. 化工进展, 2015, 34(10):3636-3643. LIU X P, JIANG Y L, ZHANG S J, et al. Melting process of porous-media-filled ice hold-over plate[J]. Chemical Industry and Engineering Progress, 2015, 34(10):3636-3643.
[21]	SIAHPUSH A, O'BRIEN J, C'REPEAU J. Phase change heat transfer enhancement using copper porous loam[J]. Journal of Heat Transfer, 2008, 130:1-11.
[22]	吴志根, 陶文铨. 金属矩阵材料在相变蓄热中的强化换热分析[J]. 工程热物理学报, 2013, 34(2):307-309. WU Z G, TAO W Q. Analysis of heat transfer performance of metal matrix materials in the phase change thermal storage system[J]. Journal of Engineering Thermophysics, 2013, 34(2):307-309.
[23]	王峥, 彭晓峰, 王补宣, 等. 多孔球层内核态沸腾过程特性的实验观察[J]. 工程热物理学报, 2002, 23(6):742-744. WANG Z, PENG X F, WANG B X, et al. Experimental investigation of nucleate boiling phenomena in bead-packed structure[J]. Journal of Engineering Thermophysics, 2002, 23(6):742-744.
[24]	赵群志, 章学来, 刘田田, 等. 多孔球层内水的过冷与蓄冷特性[J]. 化工学报, 2015, 66(1):426-432. ZHAO Q Z, ZHANG X L, LIU T T, et al. Supercooling of water and characteristics cold storage in bead-packed porous structure[J]. CIESC Journal, 2015, 66(1):426-432.
[25]	章学来, 刘田田, 赵群志, 等. 不同材料和球径的多孔球层内水的过冷度分析[J]. 化工学报, 2015, 66(6):2011-2016. ZHANG X L, LIU T T, ZHAO Q Z, et al. Analysis of supercooling degree of water in ball-packed porous structure of different materials and diameters[J]. CIESC Journal, 2015, 66(6):2011-2016.