PARAMETRIC ANALYSIS OF NEGATIVE THERMAL RESISTANCE BETWEEN PIPES OF VERTICAL SINGLE U-TUBE GROUND HEAT EXCHANGER

Li Luxi; Liao Quan; Liu Xianyan; Peng Qingyuan

doi:10.19912/j.0254-0096.tynxb.2022-1700

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Acta Energiae Solaris Sinica ›› 2024, Vol. 45 ›› Issue (3) : 210-216. DOI: 10.19912/j.0254-0096.tynxb.2022-1700

PARAMETRIC ANALYSIS OF NEGATIVE THERMAL RESISTANCE BETWEEN PIPES OF VERTICAL SINGLE U-TUBE GROUND HEAT EXCHANGER

Li Luxi¹, Liao Quan¹, Liu Xianyan², Peng Qingyuan²

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Abstract

This paper solves the coupled heat transfer process inside and outside the borehole wall of a vertical single U-tube ground heat exchanger by using the Mutipole method, analyses the steady-state heat transfer process within the borehole based on the simplified three and four thermal resistance models, parametrically investigates the influence of the pipe layout, thermal properties of grout/soil and other factors on the direct thermal resistance between pipes in the borehole, reveals the mechanism of the negative thermal resistance phenomenon between pipes in the borehole, and some constructive suggestions have been proposed for the industrial application of the simplified thermal resistance model within borehole.

Key words

ground source heat pumps / heat exchanger / thermal resistance / negative thermal resistance phenomenon / Multipole method

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Li Luxi, Liao Quan, Liu Xianyan, Peng Qingyuan. PARAMETRIC ANALYSIS OF NEGATIVE THERMAL RESISTANCE BETWEEN PIPES OF VERTICAL SINGLE U-TUBE GROUND HEAT EXCHANGER[J]. Acta Energiae Solaris Sinica. 2024, 45(3): 210-216 https://doi.org/10.19912/j.0254-0096.tynxb.2022-1700

References

[1] 徐伟. 水源地源热泵高效应用关键技术研究与示范课题组编写. 中国地源热泵发展研究报告: 2008[M]. 北京: 中国建筑工业出版社, 2008.
XU W.Prepared by the Research and Demonstration Research Team on Key Technologies for Efficient Application of Water Source Ground Source Heat Pumps. Report on China ground-source heat pump(2008)[M]. Beijing: China Architecture & Building Press, 2008.
[2] 方肇洪, 刁乃仁, 崔萍. 地埋管地源热泵系统技术集成[J]. 建设科技, 2012(13): 56-57, 61.
FANG Z H, DIAO N R, CUI P.Technical integration of ground source heat pump system with buried pipe[J]. Construction science and technology, 2012(13): 56-57, 61.
[3] CLAESSON J, HELLSTRÖM G. Multipole method to calculate borehole thermal resistances in a borehole heat exchanger[J]. HVAC&R research, 2011, 17(6): 895-911.
[4] MINAEI A, TALEE Z, SAFIKHANI H, et al.Thermal resistance capacity model for transient simulation of Earth-Air heat exchangers[J]. Renewable energy, 2021, 167: 558-567.
[5] PASQUIER P, MARCOTTE D.Short-term simulation of ground heat exchanger with an improved TRCM[J]. Renewable energy, 2012, 46: 92-99.
[6] MINAEI A, MAEREFAT M.Thermal resistance capacity model for short-term borehole heat exchanger simulation with non-stiff ordinary differential equations[J]. Geothermics, 2017, 70: 260-270.
[7] ESKILSON P, CLAESSON J.Simulation model for thermally interacting heat extraction boreholes[J]. Numerical heat transfer, 1988, 13(2): 149-165.
[8] LIAO Q, ZHOU C, CUI W Z, et al.New correlations for thermal resistances of vertical single U-tube ground heat exchanger[J]. Journal of thermal science and engineering applications, 2012, 4(3): 1.
[9] LAMARCHE L, KAJL S, BEAUCHAMP B.A review of methods to evaluate borehole thermal resistances in geothermal heat-pump systems[J]. Geothermics, 2010, 39(2): 187-200.
[10] 朱小波. 基于地埋管换热器热阻-热容网络模型的岩土热响应测试方法研究[D]. 重庆: 重庆大学, 2016.
ZHU X B.New thermal response test based on thermal resistance-capacitance network model of vertical ground heat exchanger[D]. Chongqing: Chongqing University, 2016.
[11] BAUER D, HEIDEMANN W, MÜLLER-STEINHAGEN H, et al. Thermal resistance and capacity models for borehole heat exchangers[J]. International journal of energy research, 2011, 35(4): 312-320.
[12] BENNET J, CLAESSON J, HELLSTRÖM G. Multipole method to compute the conductive heat flows to and between pipes in a composite cylinder[R]. Notes on Heat Transfer, 1987, 3.
[13] CLAESSON J, JAVED S.Explicit multipole formula for the local thermal resistance in an energy pile:the line-source approximation[J]. Energies, 2020, 13(20): 5445.