摘要
蓄热技术(thermal energy storage,TES)可有效改善建筑材料的热性能,用于TES的相变材料具有较高的储热量和良好的生物相容性,但导热系数低,传热效率不高。通过TES技术,以脱木素木材(delignified wood,DW)为载体,聚乙二醇(polyethylene glycol,PEG)为储热材料,稀土铝酸锶(SrO·Al_(2)O_(3):Eu^(2+),Dy^(3+),SAED)为导热材料制备了不同SAED含量的新型木基复合材料,同时探究了SAED含量对木基复合材料热性能的影响,结合实际工艺建立了其储热过程的传热模型并进行求解。结果表明,40%SAED/PEG/DW的导热系数和升温速率相较于纯PEG/DW分别提高了57.14%和29.76%;建模求解纯PEG/DW,20%、30%和40%SAED/PEG/DW的储热过程,对比实际值和模拟预测值,其标准误差SE分别为1.35、1.92、1.73和1.35℃,预测误差PE分别为2.82%、-0.41%、-0.19%和-0.55%,模拟结果与实测结果吻合较好,可有效预测其储热过程的温度变化情况,用于指导实际生产。
Heat storage technology(TES)can effectively improve the thermal performance of building materials.Phase change materials used for TES have high heat storage and good biocompatibility,but low thermal conductivity and low heat transfer efficiency.By TES technology,new wood-derived composites with different SAED content were prepared with delignin wood(DW)as the carrier,polyethylene glycol(PEG)as the heat storage material,and SrO·Al_(2)O_(3):Eu^(2+),Dy^(3+)(SAED)as the thermal conductivity material.Meanwhile,the influence of SAED content on the thermal properties of wood-derived composites was investigated.Combined with the actual process,the heat transfer model of the heat storage process is established and solved.The results show that the thermal conductivity and heating rate of 40%SAED/PEG/DW are 57.14%and 29.76%higher than that of pure PEG/DW,respectively.The model was used to solve the pure PEG/DW,20%,30%and 40%SAED/PEG/DW heat storage process,and the standard error SE was 1.35℃,1.92℃,1.73℃and 1.35℃respectively by comparing the actual value and the simulated predicted value.The prediction errors PE are 2.82%,-0.41%,-0.19%and-0.55%,respectively.The simulation results are in good agreement with the measured results,which can effectively predict the temperature change of the heat storage process and guide the actual production.
作者
王铭婕
万倩
何正斌
伊松林
WANG Mingjie;WAN Qian;HE Zhengbin;YI Songlin(Beijing Key Laboratory of Wood Science and Engineering,Beijing Forestry University,Beijing 100083,China)
出处
《功能材料》
CAS
CSCD
北大核心
2023年第3期3201-3207,共7页
Journal of Functional Materials
基金
国家重点研发计划(2016YFD0600701)。
关键词
稀土铝酸锶
聚乙二醇
复合材料
储热
模拟
SrO·Al_(2)O_(3):Eu^(2+),Dy^(3+)
polyethylene glycol
composites
thermal storage
simulation
