Journal of Building Engineering, Journal Year: 2024, Volume and Issue: unknown, P. 111371 - 111371
Published: Nov. 1, 2024
Language: Английский
Geothermics, Journal Year: 2023, Volume and Issue: 117, P. 102888 - 102888
Published: Dec. 7, 2023
Decarbonisation of heat is essential in curbing carbon dioxide emissions and can be achieved through the use geothermal systems. Recently, single-well, closed-loop, deep borehole exchangers, using a coaxial design, have become focus attention, partly due to potential repurpose existing infrastructure (such as oil gas wells); however, few investigated for other types exchanger middle-deep Therefore, this study, comprehensive numerical analysis was undertaken OpenGeoSys software investigate thermal hydraulic performance coaxial, single U-tube double exchangers (MDBHEs). The purpose paper test maximum operational depth each type pipe configuration wells been completed depths exceeding 500 m single/double configurations. best performing MDBHEs should minimise parasitic losses, whilst maximising output. Furthermore, ground sourced pumps require electricity; therefore, at times where electricity prices are high (and drilling costs minimised) it may more beneficial utilise encounter greater temperatures. Results indicate that provide terms specific extraction lowest pressure/parasitic losses. Double similar but significantly pressure losses across all simulations, which translates pumping power costs. Single demonstrate poorest At end 25-year base case scenario 800 MDBHE, configurations, with fluid circulation rate 5 L/s, provided rates 39.1 W/m, 32.8 36.0 respectively, inlet temperature set constant °C. For these were estimated 85 kPa (coaxial), 1.46 MPa (single U-tube) 423 (double U-tube)—the value being close nominal 16 bar (1.6 Mpa) rating SDR11 density polyethylene pipe. Further parametric also undertaken, investigating depth, flow rate, rock conductivity, diameter shank spacing.
Language: Английский
Citations
33
Geothermal Energy, Journal Year: 2024, Volume and Issue: 12(1)
Published: June 10, 2024
Language: Английский
Citations
14
Renewable and Sustainable Energy Reviews, Journal Year: 2024, Volume and Issue: 199, P. 114545 - 114545
Published: May 14, 2024
Heating and cooling both make up a large part of the total energy demand in UK; long-term seasonal thermal storage (STES) can address temporal imbalances between varying supply heat to buildings processes. Underground (UTES) play role decarbonisation by storing waste from space cooling, refrigeration, data processing, industrial processes, harvested summer solar or even generated surplus renewable (solar wind) electricity with fluctuating supply. This paper evaluates range UTES technologies UK context addresses geological suitability, capacity, low-carbon sources, surface sources demand. review concludes that there is significant potential for aquifer (ATES) borehole (BTES) systems, coinciding Therefore, uptake technology will help achieve net-zero carbon neutral targets 2050. There also scope utilise within existing subsurface infrastructure. are 464 oil gas wells which could be repurposed upon end life using different technologies. However, repurposing needs further evaluation; deep single well BTES systems have high area volume ratio storage, reducing efficiency such ATES limited issues associated contaminants. 23,000 abandoned mines underlay ∼25 % UKs population utilised minewater (MTES).
Language: Английский
Citations
10
Thermal Science and Engineering Progress, Journal Year: 2023, Volume and Issue: 48, P. 102352 - 102352
Published: Dec. 22, 2023
Heat transfer processes in geothermal wellbores are an essential component to overall system performance, but can be overlooked subsurface modelling studies that tend focus on reservoir response. This study addresses heat the wellbore through a comprehensive of 10 different parameters OpenGeoSys software designed evaluate losses during open-loop production conditions for typical low-temperature (<100 °C) single phase systems. Models were set-up effects only, using well with constant fluid inlet temperature boundary condition. Results indicate under base case 2-km deep surrounded by rock formations thermal conductivity 2.5 W/(m.K) and bottom-hole 60 °C, difference (reservoir) (wellhead) at end 40-year period is 2.06 °C. corresponds minimum into surrounding -63.3 W/m, which ∼7 % power recorded wellhead (assuming rejection 30 3.4 temperature. These significant, particularly when combination surface exchanger or breakthrough. Wellbore insulation reduce losses, it would appear this only impacts short-term. performance also improved, minimized, developing wells above interval low high gradients.
Language: Английский
Citations
11
Journal of Energy Storage, Journal Year: 2025, Volume and Issue: 113, P. 115598 - 115598
Published: Feb. 7, 2025
Language: Английский
Citations
0
Published: Feb. 14, 2025
Paul Younger, to whose memory this issue is dedicated, was an early advocate of a geothermal energy renaissance in the north England. This paper offers background experience gained with Eastgate BH1 and BH2B boreholes, focused on exploring potential Weardale Granite, followed by what has subsequently become known as Newcastle Science Central Deep Geothermal Borehole (NSCDGB), which found sequence (presumed) Fell Sandstones. These efforts represent not only legacy piece infrastructure UK, but also Younger. While NSCDGB been developed using conventional methods, it proved invaluable providing data modelling test-bed for northern England hoped that future years can serve testing facility deep research. Research carried out part recently concluded NetZero GeoRDIE confirmed could still be converted Heat Exchanger (DBHE), indicative total continuous heat yield >50 kW lifetime 25 if repurposed c.920 m depth.
Language: Английский
Citations
0
Elsevier eBooks, Journal Year: 2025, Volume and Issue: unknown, P. 181 - 220
Published: Jan. 1, 2025
Language: Английский
Citations
0
SPE/ICoTA Well Intervention Conference and Exhibition, Journal Year: 2025, Volume and Issue: unknown
Published: March 18, 2025
Abstract Geothermal heating and cooling of commercial residential buildings is a critical component decarbonization consequently reducing emitted greenhouse gases. In this paper we examine the state-of-the-art modelling ground heat exchangers their utilization in modern geothermal design software packages. Using methodology for modelling, have examined effects several key parameters plants. We argue necessity deeper boreholes show that bore-fields with deeper, but smaller number perform superiorly over same total depth shallower greater boreholes. Moreover, improvements due to groundwater flow u-loop placement are discussed. The role volumetric capacity grouts ignored most traditional models included methodologies emphasized. Considerations coiled tubing drilling applications reviewed maximum achievable predicted sample turning operation. It shown increasing torque per pressure differential positive displacement motors, although enhances mechanical efficiency, could reduce drillable depth.
Language: Английский
Citations
0
Applied Thermal Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 126284 - 126284
Published: March 1, 2025
Language: Английский
Citations
0
Applied Thermal Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 126269 - 126269
Published: March 1, 2025
Language: Английский
Citations
0