摘要
为循环利用工业固体废弃物,降低储热系统成本,以工业固废电石渣替代传统骨架材料,采用冷压烧结法创新制备7种不同配比的Na_(2)CO_(3)/电石渣复合相变储热材料,利用差示扫描量热法、恒速增压法、电子显微法、高温热冲击法、X射线衍射法、红外吸收光谱法等方法研究其储热性能、力学性能、微观结构、热循环稳定性和化学兼容性。结果表明,电石渣与碳酸钠结合可形成性能优异的复合相变储热材料;电石渣与碳酸钠质量比为52.5∶47.5时制备的复合相变储热材料(NC5)综合性能最佳,储热密度在100~900℃内达到993 J/g,抗压强度达到22.02 MPa,最高导热系数为0.62 W/(m·K);样品NC5中不同组分均匀分布,组分间具有良好的兼容性;样品NC5经100次加热/冷却循环后仍具有优异的储热性能,可为固废资源化利用和低成本储热材料研发提供技术支持。
This study innovatively fabricated seven Na_(2)CO_(3)/carbide slag shape-stable phasechange composites(SSPCCs)with carbide slag(industrial solid waste)instead of traditional skeleton materials as skeleton material via the cold-compression hot-sintering method to recycle the industrial solid waste and reduce the cost of thermal energy storage(TES)systems.Then,the TES performance,mechanical property,microstructure,thermal cycling stability,and chemical compatibility were investigated using the differential scanning calorimetry,constant-speed pressuring method,scanning electron microscopy method,hightemperature thermal shock method,X-ray diffraction analysis,and Fourier transform infrared absorption spectroscopy.Results indicated that by combining carbide slag with Na_(2)CO_(3),one might create good SSPCCs.The SSPCC(sample NC5)with the mass fraction of 52.45% carbide slag to 47.5% Na_(2)CO_(3) reached the optimal performance with a TES density of 993 J/g in the range of 100℃ to 900℃ and compressive strength of 22.02 MPa and a maximal thermal conductivity of 0.62 W/(m·K).Different components are distributed evenly and are compatible with one another in sample NC5.Moreover,sample NC5 still had excellent TES performance after the 100 heating/cooling cycles,which can provide technical support for solid waste recycling and low-cost TES materials development.
作者
王辉祥
熊亚选
任静
药晨华
宋超宇
吴玉庭
丁玉龙
WANG Huixiang;XIONG Yaxuan;REN Jing;YAO Chenhua;SONG Chaoyu;WU Yuting;DING Yulong(Beijing Key Lab of Heating,Gas Supply,Ventilating and Air Conditioning Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Beijing Building Research Institute CO.,LTD.of CSCEC,Beijing 100076,China;Key Laboratory of Enhanced Heat Transfer and Energy Conservation,Ministry of Education,Beijing University of Technology,Beijing 100124,China;Birmingham Center for Energy storage,University of Birmingham,Birmingham B152TT,UK)
出处
《储能科学与技术》
CAS
CSCD
北大核心
2022年第12期3819-3827,共9页
Energy Storage Science and Technology
基金
国家自然科学基金(52006008)
北京市教委科研项目(KM201910016011)。
关键词
工业固废
骨架材料
复合相变储热材料
储热性能
热循环稳定性
Industrial solid waste
skeleton material
shape-stable phase change composite
thermal energy storage performance
thermal cycling stability
