套管式地埋管换热器传热模型研究
摘要：传热模型是套管式地埋管换热器设计和模拟的重要依据，现有套管式地埋管换热器传热模型存在精度低或计算时间较长的问题。提出了一种新的套管式地埋管换热器传热模型：采用热阻热容模型分析钻孔内的二维(径向和轴向)传热，采用无限柱热源模型分析钻孔外的一维(径向)传热。将该模型应用于一个分布式热响应测试，并将模拟结果与实验数据及其他模型结果进行了对比。结果显示，该模型的计算结果与实验结果吻合较好，所计算的短时间内的流体温度分布及进出口流体温度具有较高的精度。
关键词：套管式地埋管换热器传热模型热阻热容模型无限柱热源模型流体温度高精度短时间
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[12] 孔彦龙，陈超凡，邵亥冰，等.深井换热技术原理及其换热量评估[J].地球物理学报，2017,60(12):4741- 4752.
[13] CARLIMM D,TONON M,ZARRELLA A,et al.A computational capacity resistance model (CaRM) for vertical ground-coupled heat exchangers[J].Renewable energy,2009,35(7):1537- 1550.
[14] NGUYEN A,PASQUIER P,MARCOTTE D.Thermal resistance and capacity model for standing column wells operating under a bleed control[J].Renewable energy,2015,76:743- 746.
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[2] 袁艳平，雷波，余南阳，等.地源热泵地埋管换热器传热研究(1):综述[J].暖通空调，2008,38(4):25- 32.
[3] 胡映宁，李常春，王小纯.套管式地埋管换热器换热性能试验研究[J].暖通空调，2011,41(9):100- 105.
[4] 方亮.地源热泵系统中深层地埋管换热器的传热分析及其应用[D].济南：山东建筑大学，2018:13- 55.
[5] 关春敏，赵树旺，张文科，等.中深层地热能供暖地埋管换热器传热分析[J].暖通空调，2021,51(6):107- 112.
[6] PAN A Q,LU L,CUI P,et al.A new analytical heat transfer model for deep borehole heat exchangers with coaxial tubes[J].International journal of heat and mass transfer,2019,141:1056- 1065.
[7] YANG X Y,WANG G D,WANG Q S,et al.Transient numerical model for a coaxial borehole heat exchanger with the effect of borehole heat capacity[J].International journal of energy research,2019,43(12):6551- 6560.
[8] BEIER R A,ACUÑA J,MOGENSEN P,et al.Transient heat transfer in a coaxial borehole heat exchanger[J].Geothermics,2014,51:470- 482.
[9] CAI W L,WANG F H,LIU J,et al.Experimental and numerical investigation of heat transfer performance and sustainability of deep borehole heat exchangers coupled with ground source heat pump systems[J].Applied thermal engineering,2019,149:975- 986.
[10] HU X C,BANKS J,WU L P,et al.Numerical modeling of a coaxial borehole heat exchanger to exploit geothermal energy from abandoned petroleum wells in Hinton,Alberta[J].Renewable energy,2020,148:1110- 1123.
[11] WANG Z H,WANG F H,LIU J,et al.Field test and numerical investigation on the heat transfer characteristics and optimal design of the heat exchangers of a deep borehole ground source heat pump system[J].Energy conversion and management,2017,153:603- 615.
[12] 孔彦龙，陈超凡，邵亥冰，等.深井换热技术原理及其换热量评估[J].地球物理学报，2017,60(12):4741- 4752.
[13] CARLIMM D,TONON M,ZARRELLA A,et al.A computational capacity resistance model (CaRM) for vertical ground-coupled heat exchangers[J].Renewable energy,2009,35(7):1537- 1550.
[14] NGUYEN A,PASQUIER P,MARCOTTE D.Thermal resistance and capacity model for standing column wells operating under a bleed control[J].Renewable energy,2015,76:743- 746.
[15] MARCOTTE B,BERNIER M.Experimental validation of a TRC model for a double U-tube borehole with two independent circuits[J].Applied thermal engineering,2019,162:114229.
[16] HOLMBERG H,ACUÑA J,NÆSS E,et al.Thermal evaluation of coaxial deep borehole heat exchangers[J].Renewable energy,2016,97:65- 76.
[17] ACUÑA J,PALM B.Distributed thermal response tests on pipe-in-pipe borehole heat exchangers[J].Applied energy,2013,109:312- 320.
Study on heat transfer model of coaxial borehole ground heat exchangers
Abstract: Heat transfer model is an important basis for the design and simulation of coaxial borehole heat exchangers, however, the existing heat transfer models of coaxial borehole heat exchangers have some disadvantages, such as low precision or too much computation time. A new heat transfer model of coaxial borehole heat exchangers is proposed, in which two-dimensional(radial and axial) heat transfer in the borehole is analysed by the thermal resistance and capacity model, and one-dimensional(radial) heat transfer outside the borehole is analysed by the infinite cylindrical-source model. The model is applied to a distributed thermal response test, and the simulation results are compared with the experimental data and the results of another model. The results show that the calculation results of the model match better with the experimental data, and that the short-time fluid temperature distribution and inlet and outlet fluid temperatures calculated by the model have high precision.
Keywords: coaxial borehole heat exchanger; heat transfer model; thermal resistance and capacity model; infinite cylindrical-source model; fluid temperature; high precision; short time;
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