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ISSN 0254-0096 CN 11-2082/K

太阳能学报 ›› 2022, Vol. 43 ›› Issue (5): 30-35.DOI: 10.19912/j.0254-0096.tynxb.2020-0448

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地埋管间断工作进出孔平均温度预测方法研究

张晨1, 关鹏1, 段新胜1, 李鹏1, 林清龙2, 李少华2   

  1. 1.中国地质大学工程学院,武汉 430074;
    2.浙江省地质调查院,杭州 311203
  • 收稿日期:2020-05-18 出版日期:2022-05-28 发布日期:2022-11-28
  • 通讯作者: 段新胜(1962—),男,博士、教授,主要从事岩土工程与浅层地热能勘探开发方面的研究。duanxinsheng@163.com
  • 基金资助:
    中国地质科学院、浙江省国土资源厅、杭州市国土资源局项目(1212011120061)

RESEARCH ON PREDICTION OF AVERAGE INLET AND OUTLET TEMPERATURE OF GROUND HEAT EXCHANGERS IN INTERMITTENT OPERATION CONDITION

Zhang Chen1, Guan Peng1, Duan Xinsheng1, Li Peng1, Lin Qinglong2, Li Shaohua2   

  1. 1. Faculty of Engineering, China University of Geosciences, Wuhan 430074, China;
    2. Geological Survey Institute of Zhejiang Province, Hangzhou 311203, China
  • Received:2020-05-18 Online:2022-05-28 Published:2022-11-28

摘要: 按不改变每天总换热量的原则,将单位长度地埋管换热孔在制冷季或制热季中每天的实际释热或取热过程简化为一个矩形释热或取热脉冲,脉冲大小为单位长度地埋管换热孔的设计释热量或设计取热量,时间为每天的等效满负荷释热或取热小时数。采用线热源理论和热流叠加原理,推导若干个矩形脉冲负荷作用后地埋管换热器进出口温度平均值的计算公式,并通过长期现场岩土热响应试验对该公式进行了验证。在已知制冷季或制热季天数和地埋管换热器每天等效满负荷工作小时的基础上,通过设定地埋管在制冷季和制热季传热流体的最高或最低温度,可用该公式计算单位长度地埋管换热孔的设计释热量或取热量。

关键词: 地源热泵, 地埋管换热器, 热负荷, 间歇运行, 等效满负荷工作小时数, 叠加原理

Abstract: According to the principle of not change the total amount of daily heat exchange, simplify the actual heat release or heat extraction to a rectangular heat transfer pulse for unit length heat exchange borehole, the amplitude of the pulse is the design heat transfer capacity and the duration is the equivalent full load (i.e. design heat transfer capacity) working hours of unit length heat exchange borehole in a day. Based on the linear heat source theory and the superposition principle, several formulas for calculating the average temperature of heat-transfer fluid in ground heat exchanger are deduced on above simplifications, and one of the formulas is verified by long-term field thermal respose tests, which provide theoretical basis for the design of ground borehole heat exchanger, and also provides an effective method to decide heat transfer capacity for unit length borehole heat exchanger based on the conventional thermal response test.

Key words: ground source heat pumps, groud heat exchanger, heat load, intermittent operation, equivalent full load working hours, superposition principle

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