技术中心

【英文篇名】 Experimental research on high-performance backfill materials for ground heat exchangers 【作者中文名】 陈卫翠; 刘巧玲; 贾立群; 孙亮亮; 方肇洪; 【作者英文名】 By Chen Weicui★; Liu Qiaoling; Jia Liqun; Sun Liangliang and Fang Zhaohong★Shandong Jianzhu University; Jinan; China; 【作者单位】 山东建筑大学; 【文献出处】 暖通空调, Heating Ventilating 水泥砂浆; 回填材料; 导热系数; 埋管长度; 【英文关键词】 ground heat exchanger; cement-sand grout; backfill material; thermal conductivity; buried pipe length; 【摘要】 通过实验研究了基于水泥、石英砂的回填材料各组分对材料导热系数、稠度、强度及膨胀率等的影响,优选出三种具有良好特性的水泥砂浆回填材料,其导热系数可达2.18～2.34W/(m·K)。通过对一个工程实例的模拟计算得出,与传统的膨润土回填材料相比,采用这些高性能回填材料能够减少地埋管换热器埋管长度29%～36%,可显著节省地埋管换热器的初投资和降低运行能耗。 【英文摘要】 Experimentally studies the influences of each component on the thermal conductivity, consistency, strength and expansion ratio of cement-quartz sand grout backfill materials. Recommends three high-performance grout materials with thermal conductivity of 2.18 to 2.34 W/(m·K). A case study shows that application of these cement-sand grout materials can reduce the buried pipe by 29% to 36% in length and the initial investment of ground heat exchangers and running energy consumption significantly compared with ... 【基金】 国家自然科学基金资助项目(编号:50476040)