摘要
采集了地源热泵埋地换热器不同深度的粘土以及准备回填的沙土、混凝土样本,对其含水率和导热系数进行了测定。同时对粘土和沙子作为不同回填土时,换热器性能进行了研究。实验表明,相同含水率条件下,混凝土的导热系数最大,粘土的导热系数最小。当沙子作为回填土时,比粘土作为回填土时双U和套管换热器的换热量增大约8%左右,单U换热器的换热量增大约为16%左右。
The main objective of the present study, which was performed for the first time in Guangzhou at the university level, is to investigate the performance characteristics of a GSHP system with different backfill soil. The heat conduction coefficient and the ratio of moisture of backfill soil sampled were measured from the different layer around the buried tube heat exchange. Results showed that heat conduction coefficient of sand and silty soil with same amount of water are less than that of concrete, The performance of the buried tube heat exchanger is different with different backfill soil.
出处
《流体机械》
CSCD
北大核心
2007年第8期60-62,共3页
Fluid Machinery
基金
广州市科技攻关项目(056Z211001)
关键词
埋地换热器
回填土
导热系数
含水率
buried tube heat exchanger
backfill soil
heat conductive coefficient
rate of water
