跨季节蓄能型地源热泵地下蓄能与释能特性  

Underground energy storage and release characteristics of ground source heat pump with seasonal energy storage

作　　者：杨卫波[1,2] 陈振乾[1,3] 施明恒[1] 

机构地区：[1]东南大学能源与环境学院,南京210096 [2]扬州大学能源与动力工程学院,扬州225127 [3]东南大学城市工程科学国际研究中心,南京210096

出　　处：《东南大学学报（自然科学版）》2010年第5期973-978,共6页Journal of Southeast University：Natural Science Edition

基　　金："十一五"国家科技支撑计划资助项目(2008BAJ12B04);中国博士后科学基金资助项目(20090461050);住房与城乡建设部科技计划资助项目(2008-K1-26);扬州大学新世纪人才工程-优秀青年骨干教师计划资助项目(2008年)

摘　　要：为了探讨跨季节蓄能型地源热泵地下蓄能与释能特性,以垂直U形埋管地下蓄能区域为研究对象,建立了准三维蓄能传热数学模型.分析了蓄能过程中土壤热作用半径与蓄热率随运行时间的变化及全年运行过程中土壤温度的动态变化规律,探讨了土壤类型与释热率对地下蓄能与释能特性及全年土壤热平衡问题的影响.结果表明:蓄能过程中不同半径处土壤温度会逐渐升高,热作用半径随时间而增大,但逐渐趋于平稳;同时,土壤类型对蓄能过程中热扩散半径与速度有影响;此外,负荷不平衡率与土壤类型对全年土壤热平衡也有一定的影响.实验验证表明,所建地下蓄能传热模型可有效模拟地下蓄能与释能过程.研究结论对跨季节蓄能型地源热泵系统的优化设计与运行具有重要指导意义.In order to investigate the underground energy storage and release characteristics of ground source heat pump with seasonal energy storage,a quasi three-dimensional heat transfer model was developed for the underground energy storage region with vertical U-bend ground heat exchangers.The variation of soil thermal interference radius and energy storage rate with energy storage operation time and the dynamic variation law of soil temperature during a year were analyzed.The effects of soil type and heat release rate on the characteristics of energy storage and release and ground heat balance during a year were investigated.The results indicate that the soil temperature at different radius would increase during the energy storage,the thermal interference radius can increase and gradually tends to be steady with the duration of operation time.At the same time,the soil thermal diffuse radius and velocity are affected by the soil type,and the ground heat balance of a year is also affected by the load imbalance rate and soil type.The experimental validations show that the developed mathematical model can be used to simulate effectively the process of underground energy storage and release.The research results can provide a significant guiding for the optimization design and operation of ground source heat pump with seasonal energy storage.

关 键 词：地源热泵 跨季节蓄能 释能 地埋管换热器 土壤热平衡 

分 类 号：TK124[动力工程及工程热物理—工程热物理]