发电技术2025，Vol.46Issue(6)：1192-1199,8.DOI:10.12096/j.2096-4528.pgt.24055
基于石块-沙子-导热油的多种组合混合储热性能研究
Study on Heat Storage Performance of Various Mixture Combinations of Stones,Sand,and Thermal Oil
摘要
Abstract
[Objectives]Traditional concrete thermal energy storage systems are prone to cracking during cyclic heat storage processes,leading to a sharp decline in overall heat storage capacity and power,which severely affects system lifespan and increases heat storage costs.To mitigate these issues,a multi-component mixed heat storage method incorporating stones,sand,and thermal oil is proposed.[Methods]Utilizing computational fluid dynamics(CFD)simulation technology,the heat storage processes of different heat storage media are simulated and investigated.[Results]Cracked concrete experiences a 23.1％reduction in heat storage capacity compared to uncracked concrete.Under the same heat storage conditions,coarse sand demonstrates better heat storage performance than fine sand.The mixture of coarse sand and thermal oil exhibits a 7.2％higher heat storage capacity than that of cracked concrete.Furthermore,the mixture of sand,stones,and thermal oil increases heat storage capacity by 20.5％relative to cracked concrete used as heat storage medium.The released heat is slightly lower than the stored heat.The heat released by cracked concrete is 21.7％lower than that of uncracked concrete and 18.86％lower than that of the mixture of sand,stones,and thermal oil used as the heat storage medium.Cost calculations further reveal that the thermal energy storage system using the mixture of stones,sand,and thermal oil as the storage medium achieves higher heat storage capacity while resulting in lower fixed and maintenance costs.[Conclusions]This multi-component mixed heat storage method can effectively address concrete cracking issues,enhance heat storage efficiency,and reduce costs,which is of great significance for advancing the development and application of heat storage technologies.关键词
储能/填充床/储热技术/储热介质/多元混合/计算流体动力学/储热量/固定成本Key words
energy storage/packed bed/thermal energy storage technology/heat storage medium/multi-component mixing/computational fluid dynamics/heat storage capacity/fixed cost分类
能源科技引用本文复制引用
李凌旭,陈龙祥,叶楷..基于石块-沙子-导热油的多种组合混合储热性能研究[J].发电技术,2025,46(6):1192-1199,8.基金项目
福建省科技计划项目(2021H0045) （2021H0045）
泉州市科技计划项目(2022C019R).Project Supported by Science and Technology Plan of Fujian Province(2021H0045) （2022C019R）
Science and Technology Plan of Quanzhou City(2022C019R). （2022C019R）
