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论文类型：期刊论文

发表时间：2011-08-06

发表刊物：Advanced Materials Research

收录刊物：EI、CPCI-S、Scopus

卷号：320

页面范围：530-535

ISSN号：9783037852118

关键字：porous media; coupled thermal conduction and groundwater advection; double U-tube heat exchanger

摘要：In this paper, the coupled thermal conduction and groundwater advection heat transfer model was developed according to the heat-transfer process between the heat exchanger underground and its ambient soil. Soil was considered as saturated porous medium. The paper analyzed that the influence of different inlet flow rate, inlet water temperature, and backfill material on the soil temperature field and heat exchange rate, compared the double U-tube and the single U-tube in numerical simulation. The results show that the enhancing of soil thermal conductivity, inlet water temperature and inlet water flow rate leads to the increase of the heat exchange rate of U tube heat exchanger, and the influence on the double U tube is relativity small. In addition, the heat exchange characteristic of the double U tube is superior to the single U tube. The result has guiding significance to the intermittent operation of the ground source heat pump.