Performance analysis of deep borehole heat exchangers for decarbonization of heating systems

Abstract

	•Operational strategy affects the performance of deep borehole heat exchanger (DBHE).
	•Correlation between thermal energy extraction and power output.
	•Longer operating time increases thermal energy extraction, shorter thermal power output.
	•Strategic regeneration of DBHE improves performance.
	•DBHE fits urban heating yielding up to a few GWh a year heat per hole in Finland.

Keywords

clean energy / deep borehole exchangers / energy transition / geothermal heat / ground-coupled heat pump

References

[1] Antelmi M, Turrin F, Zille A, Fedrizzi R. A new type in TRNSYS 18 for simulation of borehole heat exchangers affected by different groundwater flow velocities. Energies. 2023;16:3-5.

[2] Ayou DS, Wardhana MFV, Coronas A. Performance analysis of a reversible water/LiBr absorption heat pump connected to district heating network in warm and cold climates. Energy. 2023;268:126679.

[3] Barco-Burgos J, Bruno JC, Eicker U, Saldaña-Robles AL, Alcántar-Camarena V. Review on the integration of high-temperature heat pumps in district heating and cooling networks. Energy. 2022;239:122378.

[4] Bloess A, Schill WP, Zerrahn A. Power-to-heat for renewable energy integration: a review of technologies, modeling approaches, and flexibility potentials. Appl Energy. 2018;212:1611-1626.

[5] Cai W, Wang F, Chen S, et al. Analysis of heat extraction performance and long-term sustainability for multiple deep borehole heat exchanger array: a project-based study. Appl Energy. 2021;289:116590.

[6] COMSOL Multiphyscis^®. Version 6.0 (Computer program). COMSOL AB; 2021. http://www.comsol.com

[7] Deng J, Wei Q, Liang M, He S, Zhang H. Field test on energy performance of medium-depth geothermal heat pump systems (MD-GHPs). Energy Build. 2019;184:289-299.

[8] Diersch HJG. FEFLOW: Finite Element Modeling of Flow, Mass and Heat Transport in Porous and Fractured Media. Springer; 2014.

[9] European Commission. An EU Strategy on Heating and Cooling, EU; 2016.

[10] Gehlin SE, Spitler JD, Hellström G. Deep Boreholes for Ground Source Heat Pump Systems—Scandinavian Experience and Future Prospects. American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE); 2016.

[11] Helen Ltd. District Heating Hourly Data 2015-2021, 2021. Accessed April 2, 2023. https://www.helen.fi/helen-oy/vastuullisuus/ajankohtaista/avoindata

[12] Hellström G. Experiences with the borehole heat exchanger software EED. Megastock. 1997.

[13] Holmberg H, Acuña J, Næss E, Sønju OK. Thermal evaluation of coaxial deep borehole heat exchangers. Renew Energy. 2016;97:65-76.

[14] Horne RN. Design Considerations of a Down-Hole Coaxial Geothermal Heat Exchanger. Transactions Geothermal Resources Council; 1980.

[15] Hughes JD, Russcher MJ, Langevin CD, Morway ED, McDonald RR. The MODFLOW application programming interface for simulation control and software interoperability. Environ Model Softw. 2022;148:105257.

[16] IEA. Heat Pumps, IEA; 2021a. Accessed April 5, 2023. https://www.iea.org/reports/heat-pumps

[17] IEA. Net Zero by 2050, IEA; 2021b. Accessed April 2, 2023. https://www.iea.org/reports/net-zero-by-2050

[18] IEA. District Heating, IEA; 2022a. Accessed April 2, 2023. https://www.iea.org/reports/district-heating

[19] IEA. The Future of Heat Pumps, OECD/IEA; 2022b. Accessed April 2, 2023.

[20] Incropera FP, DeWitt DP, Bergman TL, Lavine AS. Incropera’s Fundamentals of Heat and Mass Transfer. 6th ed. Wiley; 2015.

[21] Kallio J. Geothermal Energy Use, Country Update for Finland, European Geothermal Congress; 2019.

[22] Kohl T, Brenni R, Eugster W. System performance of a deep borehole heat exchanger. Geothermics. 2002;31:687-708.

[23] Laitinen A, Tuominen P, Holopainen R, et al. Renewable Energy Production of Finnish Heat Pumps: Report of the SPF-Project. VTT Technical Research Centre of Finland; 2014.

[24] Laloui L, Rotta Loria AF. Analysis and Design of Energy Geostructures. Academic Press, an Imprint of Elsevier; 2020.

[25] Lund A. Analysis of Deep-Heat Energy Wells for Heat Pump Systems, Master Thesis; Aalto University. 2019.

[26] Lund P. Studies on Solar Heating Systems with Long-Term Heat Storage for Northern High Latitudes. Acta Polytechnica Scandinavica, Applied Physics Series; 1984.

[27] Lurie MV. Modeling of Oil Product and Gas Pipeline Transportation. Wiley; 2009.

[28] Montesdeoca-Martínez F, Velázquez-Medina S. Geothermal energy exploitation in an island-based 100% renewables strategy. Case study of Tenerife (Spain). J Clean Prod. 2023;426:139139.

[29] Pan S, Kong Y, Chen C, Pang Z, Wang J. Optimization of the utilization of deep borehole heat exchangers. Geother Energy. 2020;8:1-20.

[30] Piipponen K, Martinkauppi A, Korhonen K, et al. The deeper the better? A thermogeological analysis of medium-deep borehole heat exchangers in low-enthalpy crystalline rocks. Geother Energy. 2022;10:1-20.

[31] Puranen M, Järvimäki P, Hämäläinen U, Lehtinen S. Terrestrial heat flow in Finland. Geoexploration. 1968;6:151-162.

[32] Rybach L. Geothermal energy: sustainability and the environment. Geothermics. 2003;32:463-470.

[33] Rybach L, Hopkirk RJ. Shallow and deep borehole heat exchangers achievements and prospects. Pro. World Geother Cong. 1995;1995:2133-2139.

[34] Schaber K, Steinke F, Hamacher T. Managing temporary oversupply from renewables efficiently: electricity storage versus energy sector coupling in Germany. Int Energy Workshop. 2013;2013:14.

[35] Todorov O, Alanne K, Virtanen M, Kosonen R. A novel data management methodology and case study for monitoring and performance analysis of large-scale ground source heat pump (GSHP) and borehole thermal energy storage (BTES) system. Energies. 2021.

[36] Wilkie DR. Second law of thermodynamics. Nature. 1973;242:606-607.

[37] Xu X. Spitler, Modeling of Vertical Ground Loop Heat Exchangers with Variable Convective Resistance and Thermal Mass of the Fluid, Methodology. Oklahoma State University; 2005.

[38] Xue T, Jokisalo J, Kosonen R, Ju Y. Design of high-performing hybrid ground source heat pump (GSHP) system in an educational building. Buildings. 2023;13:1825.

[39] Zhang X, Wang E, Liu L, Qi C, Zhen J, Meng Y. Analysis of the operation performance of a hybrid solar ground-source heat pump system. Energy Build. 2022;268:112218.

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2024 The Authors. Deep Underground Science and Engineering published by John Wiley & Sons Australia, Ltd on behalf of China University of Mining and Technology.