针对单一水合盐相变材料相变温区适配性差,利用熔融共混法制备十二水硫酸铝铵-十水硫酸钠共晶复合相变材料,实现了单一相变材料的温度调控。共晶复合相变材料的相变温度为71℃,潜热值为242.85kJ/kg。采用质量分数为1%的氧化铝作为成核剂,复合材料的过冷度由9.4℃降低至2.5℃;添加高导热膨胀石墨提高材料的传热性能,复合材料的导热系数为原材料的1.73倍;改性后的复合相变材料循环稳定性显著提高,且储热释热密度为259.27kJ/kg。解决了单一十二水硫酸铝铵相变温度与供热末端所需温度不匹配的矛盾,制备的新型十二水硫酸铝铵-十水硫酸钠共晶复合相变材料具有合适的相变温度和较高的相变潜热,可作为以散热器为末端的供热系统、热水系统等领域的候选材料。
In response to the poor adaptability of phase change temperature region of single hydrated salt phase change material,the temperature regulation of single phase change material was achieved by preparing eutectic composite phase change material of aluminum ammonium sulfate dodecahydrate-sodium sulfate decahydrate using melt blending method.The phase change temperature of the eutectic composite phase change material was 71℃,and the latent heat value was 242.85kJ/kg.Using 1wt% alumina as nucleating agent,the supercooling degree of the composite was reduced from 9.4℃ to 2.5℃.Adding high thermally conductive expanded graphite improved the heat transfer performance of the material,and the thermal conductivity of the composite was 1.73 times that of the raw material.The cyclic stability of the modified composite phase change material was significantly improved,and the heat storage and release density was 259.27kJ/kg.In this study,the contradiction between the phase change temperature of single ammonium aluminum sulfate dodecahydrate and the required temperature at the end of heating was solved,and the prepared new ammonium aluminum sulfate-sodium sulfate decahydrate eutectic composite phase change material had suitable phase change temperature and high latent heat of phase change,which could be used as a candidate material in the field of heating system and hot water system with radiator as the end.
[1] 董军,彭诗程.双碳目标下我国储能发展及市场参与激励政策建议[J].华北电力大学学报(社会科学版),2023(3):19-27.
[2] Wang H,Ci E D,Li X Q,et al.Mg(NO3)2·6H2O-LiNO3 eutectic/expanded graphite composite phase change material for thermal energy storage applications[J].Journal of Energy Storage,2022,48:103979.
[3] 国家发展改革委,国家能源局:印发《“十四五”新型储能发展实施方案》[J].节能与环保,2022(3):6.
[4] Wang H,Zhang Y,Ci E D,et al.Preparation and characterization of a solar-driven sodium acetate trihydrate composite phase change material with Ti4O7 particles[J].Solar Energy Materials and Solar Cells,2022,238:111591.
[5] 次恩达,王会,李晓卿,等.六水硝酸镁-硝酸锂共晶盐/膨胀石墨复合相变材料的制备及性能强化[J].储能科学与技术,2022,11(1):30-37.
[6] 肖强强.光热转化相变材料的制备、性能及在太阳能热水系统中的应用[D].广州:华南理工大学,2020.
[7] 孟令然,郭立江,李晓禹,等.水合盐相变储能材料的研究进展[J].储能科学与技术,2017,6(4):623-632.
[8] 樊占胜,鹿院卫,王元媛,等.十二水硫酸铝铵新型复合相变材料及性能研究[J].热力发电,2023,52(2):32-38.
[9] 中华人民共和国住房和城乡建设部.GB 50189—2015《公共建筑节能设计标准》[S].北京:中国建筑工业出版社,2015:17-18.
[10] 罗建文.MgSO4-Na2SO4、KAl(SO4)2-Na2SO4水合盐相变储热材料优化及在太阳能蓄热器中的应用[D].西安:西北大学,2017.
[11] 王成君,段志英,王爱军,等.基于共晶系相变材料的研究进展[J].材料导报,2021,35(13):13058-13066.
[12] 张立明,邹志荣,陆国,等.温室墙体复合相变材料的制备与有限元分析[J].农机化研究,2008(4):158-160,170.
[13] 刘欣,徐涛,高学农,等.十水硫酸钠的过冷和相分离探究[J].化工进展,2011,30(S1):755-758.
[14] 陈凤兰,柳馨,铁生年,等.纳米氧化石墨烯/芒硝基复合相变材料的制备及其热性能[J].硅酸盐学报,2022,50(6):1642-1651.
[15] 李凤艳,王鹏,袁亚东,等.相变温度为室温的Na2SO4·10H2O相变储热材料的制备研究[J].合成材料老化与应用,2015,44(1):39-41,46.
[16] 韩丽蓉.相变蓄热材料十水硫酸钠的改性及应用研究[D].西安:西北农林科技大学,2014.
[17] 汤瑜凤.十水硫酸钠-十二水磷酸氢二钠室温共晶盐定形复合吸附剂的微波复合相变材料的制备及性能研究[D].广州:华南理工大学,2019.
[18] Wang H,Zhang Y,Ci E D,et al.An experimental study in full spectra of solar-driven magnesium nitrate hexahydrate/graphene composite phase change materials for solar thermal storage applications[J].Journal of Energy Storage,2021,38:102536.
[19] Wang H,Guo L J,Liu K Q,et al.Investigation of magnesium nitrate hexahydrate based phase change materials containing nanoparticles for thermal energy storage[J].Materials Research Express,2019,6:105512.
[20] 孙明杰.十二水硫酸铝铵相变储能材料应用基础研究[D].济南:山东建筑大学,2018.
[21] 胡彪,李建强,薛道荣,等.无机水合盐类相变材料在农业大棚的研究进展[J].制冷与空调(四川),2023,37(2):231-239,304.
[22] Cheng W L,Li W W,Nian Y L,et al.Study of thermal conductive enhancement mechanism and selection criteria of carbon-additive for composite phase change materials[J].International Journal of Heat and Mass Transfer,2018,116:507-511.
[23] 陈涛,孙寒雪,朱照琪,等.(准)共晶系相变储能材料的研究进展[J].化工进展,2019,38(7):3265-3273.
[24] 李海丽,季旭,冷从斌,等.膨胀石墨/五水硫代硫酸钠相变储能复合材料热性能[J].复合材料学报,2016,33(12):2941-2951.
基金资助
赤峰区域创新平台项目(2022zk002);河北省省级科技计划资助(22294301Z);唐山市科技创新团队项目(21130202D)
PDF
