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。
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.
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
Key words
ground source heat pumps /
groud heat exchanger /
heat load /
intermittent operation /
equivalent full load working hours /
superposition principle
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参考文献
[1] GB 50366—2009. 地源热泵系统工程技术规范[S].
GB 50366—2009. Technical code for ground source heat pump system[S].
[2] KAVANAUGH S, RAFFERTY K.Geothermal heating and cooling design of ground-source heat pump systems[M]. Atlanta: ASHRAE, 2014: 132-133.
[3] YAVUZTURK C, SPITLER J D.A short time step response factor model for vertical ground loop heat exchangers[J]. ASHRAE transactions, 1999, 105(2): 475-485.
[4] BERNIER M A.Ground-coupled heat pump system simulation[J]. ASHRAE transactions, 2001, 107(1): 605-616.
[5] 王景刚, 马一太, 张子平, 等. 地源热泵的运行特性模拟研究[J]. 工程热物理学报, 2003, 24(3): 361-366.
WANG J G, MA Y T, ZHANG Z P, et al.Operating performance simulation of ground source heat pump system[J]. Journal of engineering thermophysics, 2003, 24(3): 361-366.
[6] 刁乃仁, 方肇洪. 地埋管地源热泵技术[M]. 北京: 高等教育出版社, 2006: 72-74.
DIAO N R, FANG Z H.Ground-coupled heat pump technology[M]. Beijing: Higher Education Press, 2006: 72-74.
[7] 杨卫波, 施明恒. 基于线热源理论的垂直U型埋管换热器传热模型的研究[J]. 太阳能学报, 2007, 28(5): 482-488.
YANG W B, SHI M H.Study on heat transfer model of vertical U-tube ground heat exchangers based on line heat source theory[J]. Acta energiae solaris sinica, 2007, 28(5): 482-488.
[8] 杨卫波, 施明恒. 基于垂直U型埋管换热器的圆柱源理论及其应用研究[J]. 制冷学报, 2006, 27(5): 51-57.
YANG W B, SHI M H.Study on cylindrical source theory based on vertical U-tube ground heat exchangers and it’s application[J]. Journal of refrigeration, 2006, 27(5): 51-57.
[9] 段新胜, 顾湘, 林浩欣, 等. 热响应试验后的热恢复试验理论与应用研究[J]. 太阳能学报, 2017, 38(8): 2317-2322.
DUAN X S, GU X, LIN H X, et al.Theory and application study of thermal recovery test after thermal response test[J]. Acta energiae solaris sinica, 2017, 38(8): 2317-2322.
[10] INGERSOLL L R, PLASS H J.Theory of the ground pipe heat source for the heat pump[J]. Heating piping and air conditioning, 1948, 20(7): 119-122.
[11] CARSLAW H S, JAEGER J C.Conduction of heat in solids[M]. 2nd Ed. Oxford: Clarendon Press, 1959: 261.
基金
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）
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