纳米成核剂对三水醋酸钠蓄热性能的影响
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摘要
三水醋酸钠是一种熔点适宜,潜热值较高的相变储热材料,在太阳能热利用方面具有广泛的应用前景。但是在其凝固过程中,相分离和过冷问题严重影响了蓄热性能,限制了其应用。以几种纳米材料(纳米氧化铝、纳米铜、碳纳米管)为成核剂,实验分析了三水醋酸钠蓄热性能的变化情况,结果表明质量分数2%的Al_2O_3、1%的Cu、2%的碳纳米管在自然分散下就能够消除三水醋酸钠的过冷,且纳米成核剂可以提高三水醋酸钠的导热性能。
Sodium Acetate Trihydrate( SAT),which has appropriate melting point and high latent heat value,is a promising phase change material for its wide application prospect in the solar energy utilization. However,the supercooling and phase segregation problems during the freezing process seriously affected the heat storage performance,which limit its application. In this study,the effect of several nanoparticles( Al_2O_3,Cu,carbon nanotubes) as nucleating agents for SAT are experimental investigated.The results show that the additions of 2%Al_2O_3,1%Cu,2%carbon nanotubes naturally dispersed in sodium acetate trihydrate are able to eliminate the supercooling and improve the performance of thermal conductivity of Sodium Acetate Trihydrate.
Sodium Acetate Trihydrate( SAT),which has appropriate melting point and high latent heat value,is a promising phase change material for its wide application prospect in the solar energy utilization. However,the supercooling and phase segregation problems during the freezing process seriously affected the heat storage performance,which limit its application. In this study,the effect of several nanoparticles( Al_2O_3,Cu,carbon nanotubes) as nucleating agents for SAT are experimental investigated.The results show that the additions of 2%Al_2O_3,1%Cu,2%carbon nanotubes naturally dispersed in sodium acetate trihydrate are able to eliminate the supercooling and improve the performance of thermal conductivity of Sodium Acetate Trihydrate.
引文
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[19]丁德锋,郑国杰,刘世杰,等.利用T-history曲线法求解三水醋酸钠热物性[J].广州化工,2015,(22):69-71.DING De-feng,ZHENG Guo-jie,LIU Shi-jie,et al.Calculation of the thermophysical properties of sodium acetate trihydrate using T-history method[J].Guangzhou Chemical Industry,2015,(22):69-71.(in Chinese)
[20]聂光华,张志英.几种结晶水合盐的热导率测量研究[J].西北大学学报:自然科学版,2001,31(6):492-495.NI Guang-hua,ZHANG Zhi-ying.Conductivity calculation of several kind of crystalline hydrated salt[J].Journal of Northw est University(Natural Science Edition),2001,31(6):492-495.(in Chinese)
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[2]张雪梅,蔡路茵,苏忠杰,等.超声波对三水醋酸钠相分离及结晶的影响[J].化工学报,2010,61(1):104-108.ZHANG Xue-mei,CAI Lu-yin,SU Zhong-jie,et al.Effects of ultrasound on phase separation and crystallization of sodium acetate trihydrate[J].Journal of Chemical Industry and Engineering,2010,61(1):104-108.(in Chinese)
[3]王智平,郭长华,王克振,等.相变储热材料CH3COONa·3H2O的研究与发展趋势[J].材料导报,2010,24(8):60-63.WANG Zhi-pin,GUO Chang-hua,WANG Ke-zhen,et al.Research and prospect of sodium acetate trihydrate phase change material[J].M aterial Review,2010,24(8):60-63.(in Chinese)
[4]王崇云,王维,冯利利,等.正二十烷与膨胀石墨共改性三水合醋酸钠相变材料储热性能[J].复合材料学报,2014,31(3):824-829.WANG Chong-yun,WANG Wei,FENG Li-li,et al.Phase change property of sodium acetate trihydrate modified with n-Eicosane and expanded graphite[J].Acta Materiae Compositae Sinica,2014,31(3):824-829.(in Chinese)
[5]Sharma R K,Ganesan P,Tyagi V V,et al.Developments in organic solid-liquid phase change materials and their applications in thermal energy storage[J].Energy Conversion and M anagement,2015,95:193-228.
[6]李晶,刘中良,马重芳.改善三水醋酸钠固液相变性能的实验研究[J].工程热物理学报,2006,27(5):817-819.LI Jing,LIU Zhong-liang,M A Chong-fang.Experimental study on improving solid-liquid phase change performance of sodium acetate trihydrate[J].Journal of Engineer Thermophysics,2006,27(5):817-819.(in Chinese)
[7]Cabeza L F,Svensson G,Hiebler S,et al.Thermal Performance of Sodium Acetate Trihydrate Thickened With Different M aterials as Phase Change Energy Storage M aterial[J].Applied Thermal Engineering,2003,23(13):1697-1704.
[8]方玉堂,金策,梁向晖,等.三水醋酸钠/甲酰胺复合相变材料的制备及性能[J].化工学报,2015,66(12):5142-5148.FANG Yu-tang,JIN Ce,LIANG Xiang-hui,et al.Preparation and performance of sodium acetate trihydrate/formamide composite phase change material[J].Journal of Chemical Industry and Engineering,2015,66(12):5142-5148.(in Chinese)
[9]石海民,梁德青,李栋梁,等.CH3COONa·3H2O相变蓄热性能研究[J].制冷学报,2009,30(2):8-11.SHI Hai-min,LIANG De-qing,LI Dong-liang,et al.Study on phase change property of heat storage material CH3COONa·3H2O[J].Journal of Refrigeration,2009,30(2):8-11.(in Chinese)
[10]丁红雨,李慧星,冯国会.基于相变材料三水醋酸钠蓄热性能实验研究[J].建筑节能,2014,(10):42-45.DING Hong-yu,LI Hui-xin,FENG Guo-hui.Experimental research on thermal storage performance of CH3COONa·3H2O as phase change material[J].Building Energy Efficiency,2014,(10):42-45.(in Chinese)
[11]卢大杰,胡芃,赵斌斌,等.三水合醋酸钠纳米成核剂的性能研究[J].工程热物理学报,2012,33(8):1279-1282.LU Da-jie,HU Peng,ZHAO Bin-bin,et al.Study on the performance of nanoparticles as nucleating agents for sodium acetate trihydrate[J].Journal of Engineer Thermophysics,2012,33(8):1279-1282.(in Chinese)
[12]李金田,茅靳丰,李伟华,等.三水醋酸钠的过冷机理与实验研究[J].制冷学报,2009,30(5):32-35.LI Jin-tian,M AO Jin-feng,Li Wei-hua,et al.Supercooling mechanism and experimental study of sodium acetate trihydrate[J].Journal of Refrigeration,2009,30(5):32-35.(in Chinese)
[13]Peter M,Ron E.Thermal property and latent heat energy storage behavior of sodium acetate trihydrate composites containing expanded graphite and carboxymethyl cellulose for phase change materials[J].Applied Thermal Engineering,2015,75(1):978-983.
[14]Dannemand M,Johansen J B,Furbo S.Solidification behavior and thermal conductivity of bulk sodium acetate trihydrate composites w ith thickening agents and graphite[J].Solar Energy M aterials&Solar Cells,2016,145:287-295.
[15]张贺磊,方贤德,赵颖杰.相变储热材料及技术的研究进展[J].材料导报,2014,28(13):26-32.ZHANG He-lei,FANG Xian-de,ZHAO Yin-jie.Progress in phase change materials and technologies[J].M aterials Review,2014,28(13):26-32.(in Chinese)
[16]徐建霞,柯秀芳.三水合醋酸钠相变储能性能研究[J].材料导报,2007,(S3):319-321.XU Jian-xia,KE Xiu-fang.Study of phase change property of sodium acetate trihydrate as energy storage material[J].M aterial Review,2007,(S3):319-321.(in Chinese)
[17]李伟华,茅靳丰,李金田,等.三水醋酸钠基复合相变材料导热能力强化研究[J].建筑材料学报,2013,16(3):517-520.LI Wei-hua,M AO Jin-feng,LI Jin-tian,et al.Study of enhancing heat conductivity of composite phase change material based on trihydrate sodium acetate[J].Journal of Building M aterial,2013,16(3):517-520.(in Chinese)
[18]郎雪梅,叶菊招.三水合醋酸钠的相变贮热性能[J].材料开发与应用,2003,18(1):4-7.LANG Xue-mei,YE Ju-zhao.Phase Change property of sodium acetate trihydrate as heat storage material[J].Development and Application of M aterials,2003,18(1):4-7.(in Chinese)
[19]丁德锋,郑国杰,刘世杰,等.利用T-history曲线法求解三水醋酸钠热物性[J].广州化工,2015,(22):69-71.DING De-feng,ZHENG Guo-jie,LIU Shi-jie,et al.Calculation of the thermophysical properties of sodium acetate trihydrate using T-history method[J].Guangzhou Chemical Industry,2015,(22):69-71.(in Chinese)
[20]聂光华,张志英.几种结晶水合盐的热导率测量研究[J].西北大学学报:自然科学版,2001,31(6):492-495.NI Guang-hua,ZHANG Zhi-ying.Conductivity calculation of several kind of crystalline hydrated salt[J].Journal of Northw est University(Natural Science Edition),2001,31(6):492-495.(in Chinese)
[21]高安旗.纳米复合相变储能材料性能研究[D].广州:暨南大学,2015.GAO An-qi.Nanocomposite phase change materials for heat storage[D].Guangzhou:Jinan University,2015.(in Chinese)