稳态强磁场实验装置(Steady High Magnetic Field Facilities,SHMFF)的运行需要10℃以下的去离子水带走磁体内的热负荷。通过优化蓄冷罐内的布水器类型和尺寸提高分层蓄冷效率,增加磁体装置的运行时间,在理论指导下以设计计算为基础选取...稳态强磁场实验装置(Steady High Magnetic Field Facilities,SHMFF)的运行需要10℃以下的去离子水带走磁体内的热负荷。通过优化蓄冷罐内的布水器类型和尺寸提高分层蓄冷效率,增加磁体装置的运行时间,在理论指导下以设计计算为基础选取5种径向型布水器,且采用数值模拟的方法研究了同一蓄冷罐内八角型和径向型布水器的斜温层厚度。定义布水效率的计算方法,并以布水效率为评价指标,分析了布水器的布水效果。研究表明:相同Re下径向型布水器的布水效果优于八角型,更易形成稳定的斜温层;相同出口流速型号为200-7.5径向型布水器的布水效率为89%;而型号为375-4的径向型布水器的布水效率为84.2%;径向型布水器的径高比是影响蓄冷罐内斜温层厚度的重要因素。研究成果可为蓄冷系统径向型布水器的优化设计提供指导依据。展开更多
Deep mining is an inevitable tendency in the development of coal industry. There are many heat damage problems with the increase of mining depth. The technology of using doublet wells, together with Heat Exchange Ma...Deep mining is an inevitable tendency in the development of coal industry. There are many heat damage problems with the increase of mining depth. The technology of using doublet wells, together with Heat Exchange Machine Systems （HEMSs）, to store cold energy is a key to solve the heat damage problems in deep mines. Based on the geological conditions, thermodynamic and hydraulic parameters of Jiahe Mine, the isotherms in the period of cold energy storage and refrigeration and the volumes of cold water within different temperature ranges of the cold energy storage well were numerically analyzed. The results show that 1） with the same pumped and injected water volumes, the lower the temperature of injected water is, the larger the volume.of cold water in the cold energy storage well is. With the larger volume, the effect of cold energy storage is better. 2） the larger the volumes of pumped and reinjected water frigeration is better. And 3） without disturbance, the volume and temperature of cold water in the cold energy storage well can keep unchanged or have only a little change for a long time. Therefore the technology of doublet wells for cold energy storage is feasible and the cold energy storage aquifers can meet the requirement of the technology.展开更多
文摘稳态强磁场实验装置(Steady High Magnetic Field Facilities,SHMFF)的运行需要10℃以下的去离子水带走磁体内的热负荷。通过优化蓄冷罐内的布水器类型和尺寸提高分层蓄冷效率,增加磁体装置的运行时间,在理论指导下以设计计算为基础选取5种径向型布水器,且采用数值模拟的方法研究了同一蓄冷罐内八角型和径向型布水器的斜温层厚度。定义布水效率的计算方法,并以布水效率为评价指标,分析了布水器的布水效果。研究表明:相同Re下径向型布水器的布水效果优于八角型,更易形成稳定的斜温层;相同出口流速型号为200-7.5径向型布水器的布水效率为89%;而型号为375-4的径向型布水器的布水效率为84.2%;径向型布水器的径高比是影响蓄冷罐内斜温层厚度的重要因素。研究成果可为蓄冷系统径向型布水器的优化设计提供指导依据。
基金Project 50490270 supported by Key Project of National Natural Science Foundation of China
文摘Deep mining is an inevitable tendency in the development of coal industry. There are many heat damage problems with the increase of mining depth. The technology of using doublet wells, together with Heat Exchange Machine Systems （HEMSs）, to store cold energy is a key to solve the heat damage problems in deep mines. Based on the geological conditions, thermodynamic and hydraulic parameters of Jiahe Mine, the isotherms in the period of cold energy storage and refrigeration and the volumes of cold water within different temperature ranges of the cold energy storage well were numerically analyzed. The results show that 1） with the same pumped and injected water volumes, the lower the temperature of injected water is, the larger the volume.of cold water in the cold energy storage well is. With the larger volume, the effect of cold energy storage is better. 2） the larger the volumes of pumped and reinjected water frigeration is better. And 3） without disturbance, the volume and temperature of cold water in the cold energy storage well can keep unchanged or have only a little change for a long time. Therefore the technology of doublet wells for cold energy storage is feasible and the cold energy storage aquifers can meet the requirement of the technology.
