流体机械

2016, v.44;No.533(11) 61-66

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地埋换热器温度场数值模拟及试验研究
Numerical Simulation and Experimental Research on the Temperature Field around Ground-loop Heat Exchangers

郭二宝;
GUO Er-bao;Anhui Jianzhu University;

摘要(Abstract):

土壤温度场的恢复特性是判定土壤源热泵系统长期稳定运行的重要依据。探讨了某住宅小区土壤源热泵系统的设计方法及主要部件地埋换热器的埋管方式。利用建筑热环境设计模拟分析软件De ST-h建立高层住宅建筑群模型,并进行全年空调负荷模拟。运用大型商业软件FLUENT模拟分析了土壤源热泵连续运行一个夏季和经过一个秋季过渡季后地埋换热器周围土壤温度场的变化和恢复情况,试验研究了制冷过程及制冷期后地层温度恢复过程不同地层的温度分布,结果与数值模拟基本吻合。最后,指出复合式土壤源热泵有利于促进土壤温度场的恢复,从而实现系统长期稳定地运行。
The recovery characteristic of soil temperature field is an important basis to determine the long-term stable operation of GCHP. Explore the design methods of GCHP of a residential district,and introduce burying way of the main part soil heat exchanger. The high-rise residence buildings ' model is established and the annual air-conditioning load is simulated through the building thermal environment simulation software De ST-h. The large-scale commercial software FLUENT is used to simulate and analyze the soil temperature distribution and recovery around the ground-loop heat exchanger after a summer's operation and a autumn's recovery of GCHP. The temperature distribution of different strata during cooling process and recovery process of formation temperature after cooling is studied experimentally. The results are in agreement with the numerical simulation. At last,the result shows that hybrid GCHP is conducive to the restoration of the soil temperature,so that the system can run stably for a long time.

关键词(KeyWords): 土壤源热泵;地埋换热器;温度场;模拟;土壤热平衡
ground-coupled heat pump;ground-loop heat exchanger;temperature field;simulation;soil heat balance

Abstract:

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基金项目(Foundation): 安徽省高等学校省级优秀青年人才基金项目(2012SQRL132)

作者(Author): 郭二宝;
GUO Er-bao;Anhui Jianzhu University;

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