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闭环地源热泵系统建模 被引量:4

The modeling of ground-coupled heat pump systems
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摘要 目前国内对地源热泵的研究多集中在地热换热器的传热模型理论研究方面,而对地源热泵系统整体性能的研究则局限于实验测试,因此迫切需要建立一个地源热泵的系统模型来进行系统的优化设计和系统性能预测.采用理论解析方法建立了竖直U型埋管地热换热器的准三维模型,该模型考虑了两支管间的热短路问题,比现有模型更接近于实际工程.采用确定性模型法建立了热泵机组的模型,然后通过能量和质量守衡方程式建立了系统动态耦合模型.利用该模型即可预测在不同的地热换热器配置情况下,地源热泵系统的各项性能.试验表明,该系统模型预测结果与实测值吻合的较好. At present, study on ground-coupled heat pump systems is heat transfer model of geothermal heat exchangers and system performance measurement in China. It is essential to establish a system model to optimize the design of geothermal heat exchangers and predict system performance. A quasi-three-dimensional model for vertical U tube has been developed in this article, which analyzes the impact of thermal "short-circuit", or thermal interference, between the Utube legs on the performance of the ground exchanger, and is fairly closer to the case of practical engineering. The heat pump unit model has been set up with detailed deterministic approach. The dynamic system model is coupled with geo thermal heat exchanger model and heat pump unit model, which is based on the conservation of mass and energy. The system performance can be predicted according to this model in the different layout of geothermal heat exchanger. Ideal agreement between the predicted and experimental results is obtained.
出处 《西安建筑科技大学学报(自然科学版)》 CSCD 北大核心 2007年第2期235-239,244,共6页 Journal of Xi'an University of Architecture & Technology(Natural Science Edition)
基金 国家自然科学基金项目(50476040)
关键词 地源热泵系统 地热换热器 机组模型 系统模型 ground-coupled heat pumps geothermal heat exchangers unit models system models
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参考文献9

  • 1曲云霞,张林华,方肇洪,李安桂.地源热泵名义工况探讨[J].西安建筑科技大学学报(自然科学版),2003,35(3):221-225. 被引量:20
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二级参考文献11

  • 1方肇洪 刁乃仁 苏登超 等.竖直U型埋管地源热泵空调系统的设计与安装[J].现代空调,2001,(10):101-105.
  • 2机械工业部冷冻设备标准化技术委员会编.制冷空调技术标准应用手册[M].北京:机械工业出版社,1997.
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  • 6Kavaragh S P.Ground-source heat pumps[J].ASHARE Journal,1998,40(10).
  • 7Gu Y,O′Neal D L.Development of an equivalent diameter expression for vertical U-tubes used in ground-coupled heat pumps[J].ASHRAE Transactions,1998,104(2):347-355.
  • 8Diao N R,Cui P,Fang Z H.The thermal resistance in a borehole of geothermal heat exchangers[C].Proc.12th International Heat Transfer Conference,2002.
  • 9曾和义,刁乃仁,方肇洪.竖直埋管地热换热器的稳态温度场分析[J].山东建筑工程学院学报,2002,17(1):1-6. 被引量:25
  • 10曲云霞,张林华,方肇洪,李安桂.地源热泵地下环路的设计方法[J].流体机械,2002,30(9):50-52. 被引量:13

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