冰浆存蓄含冰率优化研究进展  

Research progress on optimization of ice packing factor in ice slurry storage

作　　者：时国华[1,2] 周文博 王玉乔 傅豪杰 Shi Guohua;Zhou Wenbo;Wang Yuqiao;Fu Haojie(Department of Power Engineering,North China Electric Power University,Baoding 071003,China;Hebei Key Laboratory of Low Carbon and High Efficiency Power Generation Technology,North China Electric Power University,Baoding 071003,China)

机构地区：[1]华北电力大学动力工程系,保定071003 [2]华北电力大学河北省低碳高效发电技术重点实验室,保定071003

出　　处：《低温与超导》2024年第4期31-39,共9页Cryogenics and Superconductivity

基　　金：国家重点研发计划项目(2022YFC3802401);河北省重点研发计划项目(20376201D)资助。

摘　　要：提升蓄冰槽内含冰率可有效提高冰浆蓄冷技术的经济性,有助于推进我国集中供冷和冷热联供的发展。为此,本文在回顾和总结冰浆蓄冷机理和冰浆蓄冷模型的基础上,分析了冰浆存蓄含冰率的关键影响因素,总结了提高蓄冰槽内含冰率的方法,并对大规模冰浆蓄冷的研究趋势进行了展望。研究结果表明:冰浆存储过程中Ostwald熟化和团聚作用会增大冰晶粒径,不利于富冰层的均匀堆积,应削弱Ostwald熟化和团聚效应以提升含冰率;在Tanino模型基础上,实验验证了利用Ergun方程可准确预测跨季节冰浆蓄冷的含冰率;制备冰浆时添加冰点抑制剂、蓄冰槽内设置搅拌器、提高蓄冰槽入口冰浆流量、减小入口冰浆含冰率等措施有利于蓄冰槽内富冰层的均匀堆积,提高蓄冰槽内含冰率;短期冰浆蓄冷优先选用圆柱体蓄冰槽,跨季节冰浆蓄冷优先选用地下梯台型蓄冰槽。本文研究成果有助于推进跨季节大规模冰浆蓄冷的实施应用。Increasing the ice packing factor(IPF)in the ice storage tank can effectively improve the economy of the ice slurry storage technology and contribute to the development of centralized cooling and cold-heat cogeneration in our country.Based on the review and summary of the mechanism and model of ice slurry storage,this paper analyzed the key influencing factors of IPF in ice slurry storage,summarized the methods to increase the IPF in the ice storage tank,and the research trend of large-scale ice slurry storage was looked forward.The research results show that the Ostwald ripening and aggregation effects during the ice slurry storage process will increase the size of ice crystals,which is not conducive to the uniform accumulation of the ice-rich layer,so the Ostwald ripening and aggregation effects should be weakened to improve the IPF.Based on the Tanino model,it is experimentally verified that the Ergun equation can accurately predict the IPF of seasonal ice slurry storage.Measures such as adding ice point inhibitors during ice slurry preparation,setting agitators in the ice storage tank,increasing the ice slurry flow rate at the entrance of the ice storage tank,and reducing the IPF at the entrance of the slurry are beneficial to the uniform accumulation of the ice-rich layer in the ice storage tank and improve the IPF in the ice storage tank.For short-term ice slurry storage,cylindrical ice storage tanks are preferred,while for seasonal ice slurry storage,underground stepped ice storage tanks are preferred.The research results of this article are helpful for the implementation and application of large-scale seasonal ice slurry storage.

关 键 词：含冰率优化 冰浆 蓄冰槽 冰浆蓄冷机理 富冰层 

分 类 号：TB611[一般工业技术—制冷工程] TB64