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。
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 conventional bentonite grout.
出处
《暖通空调》
北大核心
2006年第9期1-6,23,共7页
Heating Ventilating & Air Conditioning
基金
国家自然科学基金资助项目(编号:50476040)
关键词
地埋管换热器
水泥砂浆
回填材料
导热系数
埋管长度
ground heat exchanger, cement-sand grout, backfill material, thermal conductivity, buried pipe length
