高等学校化学学报2025，Vol.46Issue(11)：134-142,9.DOI:10.7503/cjcu20250170
落入式量热法对熔盐储热材料热力学性质的研究
Thermodynamic Property of Molten Salt Thermal Energy Storage Materials Using Drop Calorimetric Technique
摘要
Abstract
As heat storage media,molten salt thermal storage materials have received considerable attention in the field of high-temperature thermal storage technology.Research and understanding of their thermodynamic properties are fundamental to advancing molten salt thermal storage materials.In this study,a high-temperature drop calorimeter was developed for investigating the thermodynamic properties of molten salt thermal energy storage materials.The accuracy of the drop calorimeter was determined to be±0.5%by measuring the enthalpy of the standard material of α-Al2O3.By measuring the enthalpy values of high-purity Sn before and after its solid-liquid phase transition,the measurement deviations for phase transition temperature and enthalpy from the differential scanning calorimetry(DSC)measurement results were determined to be±0.12%and±1.3%,respectively.The enthalpy values of NaNO3,KNO3,and solar salt(60%NaNO3-40%KNO3)were measured by the drop calorimeter in the temperature range of 350-750 K.Polynomial equations for the enthalpy of both the solid and liquid phases were obtained through data fitting,and the phase transition temperatures and enthalpy values were calculated.The results of this study indicate that the drop calorimetry method can accurately measure the enthalpy,phase transition temperature,phase transition enthalpy,and other thermodynamic properties of molten salt thermal storage materials,providing a reliable calorimetric experimental method for their thermodynamic research.关键词
落入式量热法/太阳熔盐/硝酸钾/硝酸钠/相变焓/相变温度/焓Key words
Drop calorimetric technique/Solar molten salt/Potassium nitrate/Sodium nitrate/Phase transition enthalpy/Phase transition temperature/Enthalpy分类
化学化工引用本文复制引用
吴冰,尹楠,胡金玲,魏小兰,赵红,史全..落入式量热法对熔盐储热材料热力学性质的研究[J].高等学校化学学报,2025,46(11):134-142,9.基金项目
国家自然科学基金(批准号:22273100)、辽宁省科技计划项目(批准号:2024JH2/102600006)和大连化学物理研究所创新项目(批准号:DICP I202440)资助. Supported by the National Natural Science Foundation of China(No.22273100),the Science and Technology Planning Project of Liaoning Province,China(No.2024JH2/102600006)and the Innovation Project of Dalian Institute of Chemical Physics,China(No.DICP I202440). （批准号:22273100）
