The vacuum adsorption method and the sol-gel method were used to prepare the composite form-stable phase change material(PCM) with polyethylene glycol (PEG) as the phase change material,expanded graphite (EG) as the carrier matrix,and silica(SiO2) as the encapsulating material.The surface morphology,shaping effect,crystallization performance,heat storage,thermal stability and thermal conductivity of the PCM with different composition ratios were studied.The results shown that the abundant three-dimensional pore structure on the surface of EG can effectively adsorb PEG,and the dense SiO2 can play a role in encapsulating the pore structure of EG.The maximum mass fraction of PEG in the PCM was 82%.After 100 phase change cycle,it can still maintain a good shape setting effect,and had good crystallization performance,heat storage performance,thermal stability and thermal conductivity.The PCM can be widely used in fields such as building energy saving and road engineering.
[1] Mao Q.Recent developments in geometrical configurations of thermal energy storage for concentrating solar power plant[J].Renewable and Sustainable Energy Reviews,2016,59:320-327.
[2] Safari A,Saidur R,Sulaiman F A,et al.A review on supercooling of phase change materials in thermal energy storage systems[J].Renewable and Sustainable Energy Reviews,2017,70:905-919.
[3] 何丽红,王浩,杨帆,等.PEG/SiO2相变颗粒对沥青胶浆性能实验研究[J].化工新型材料,2018,46(8):257-260.
[4] Miró L,Gasia J,Cabeza L F.Thermal energy storage (TES) for industrial waste heat (IWH) recovery:a review[J].Applied Energy,2016,179:284-301.
[5] Wahid M A,Hosseini S E,Hussen H M,et al.An overview of phase change materials for construction architecture thermal management in hot and dry climate region[J].Applied Thermal Engineering,2017,112:1240-1259.
[6] 何丽红.复合相变储热沥青路面材料研制及降温机理[D].重庆:重庆交通大学,2016.
[7] Nazir H,Batool M,Osorio F J B,et al.Recent developments in phase change materials for energy storage applications:a review[J].International Journal of Heat and Mass Transfer,2019,129:491-523.
[8] De Gracia A,Cabeza L F.Phase change materials and thermal energy storage for buildings[J].Energy and Buildings,2015,103:414-419.
[9] 王思宇,郭彦峰,余亮汉,等.PEG/EG复合相变储能材料蓄冷性能的实验研究[J].中国塑料,2018,32(4):51-57.
[10] Li C,Zhang B,Xie B,et al.Stearic acid/expanded graphite as a composite phase change thermal energy storage material for tankless solar water heater[J].Sustainable Cities and Society,2019,44:458-464.
[11] 张磊.聚乙二醇基复合储热材料的制备、性能及其相变传热过程研究[D].武汉:武汉理工大学,2012.
[12] 赵建国,郭全贵,刘朗,等.聚乙二醇/膨胀石墨相变储能复合材料[J].现代化工,2008(9):46-47.
[13] 康丁,西鹏,段玉情,等.聚乙二醇/膨胀石墨相变储能复合材料的研究[J].化工新型材料,2011,39(3):106-108+119.
[14] 张一博.多孔基复合相变材料应用于沥青路面储热降温的试验研究[D].重庆:重庆交通大学,2012.
[15] 王瑞馨,江阿兰.复合相变材料的制备及在沥青混凝土中调温效果[J].低温建筑技术,2018,40(4):13-16.
[16] Miao C,Lü G,Yao Y,et al.Preparation of silica microcapsules containing octadecane as temperature-adjusting powder[J].Chemistry Letters,2007,36(4):494-495.
[17] Miao C Y,Yao Y W,Tang G Y,et al.Preparation and characterization of silica microcapsules containing butyl-stearate via sol-gel method[J].Transactions of Nonferrous Metals Society of China,2007,17(s1B):s1018-s1021.
基金资助
国家自然科学基金(51908178);国家重点研发计划项目(2018YFF0300200);河北省自然科学基金(E2018402206);河北省教育厅青年拔尖人才计划项目(BJ2017034);河北省教育厅青年基金(QN2019108)
PDF
