摘要
本文基于能量平衡方程,建立了土壤源热泵U型埋管换热器周围土壤的非稳态传热模型,用所建立的传热模型对土壤源热泵冬季取热过程进行了动态模拟。研究了不同物性土壤温度及U型埋管出口流体温度的变化规律,分析了土壤物性对换热器换热性能的影响,采用间歇运行方式提高了换热器换热能力。通过建立数学模型得出的结果,可供设计参考。
Based on energy balance equations, this paper proposed a transient heat transfer model of underground temperature field around the U - tube vertical heat exchanger. The dynamic simulation on the extracting heat process for ground - source heat pump was conducted. The change rules of underground temperature field for different properties soil and exit fluid temperature of U - tube buried coil were studied. The paper analyzed the influence of properties of soil on the performance of the heat exchanger. The intermittent operations helped to promote exchange capacity. The result provided references for the system design.
出处
《节能技术》
CAS
2007年第6期512-515,共4页
Energy Conservation Technology
关键词
土壤源热泵
U型埋管换热器
土壤温度场
ground - source heat pump
U - tube heat exchanger
temperature field
