Energetic Efficiency of a Deep Borehole Heat Exchanger Adapted from a Freezing Borehole Based on a Long-Term Thermal Response Test DOI Creative Commons
Tomasz Śliwa,

Jakub Drosik,

Michał Kruszewski

et al.

Energies, Journal Year: 2024, Volume and Issue: 17(23), P. 6016 - 6016

Published: Nov. 29, 2024

This paper describes the characteristics of a thermal response test and presents results conducted on borehole at freezing shaft in Poland. Freezing boreholes are temporary created to facilitate other geological work, especially for large-diameter mine shafts or boreholes. Due their nature, they abandoned after necessary work around is completed. The economical point view suggests that, use as boreholes, should be used heating if possible. In this paper, authors aim suggest that can utilized heat exchangers. Large numbers sit idle across globe while could renewable energy source, so creating new way obtain power future popularized. includes description implementation method sample intended abandonment. were interpreted, key parameters exchanger based determined satisfactory. possibilities uses also described.

Language: Английский

A comprehensive review of deep borehole heat exchangers (DBHEs): subsurface modelling studies and applications DOI Creative Commons
Isa Kolo, Christopher S. Brown,

William Nibbs

et al.

Geothermal Energy, Journal Year: 2024, Volume and Issue: 12(1)

Published: June 10, 2024

Language: Английский

Citations

14
Geothermal cascade utilization for low-carbon building cooling and heating via collaboration of shallow and deep borehole heat exchanger array DOI
Wei He, Bo Ren, Hui Jin

et al.

Journal of Building Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 111870 - 111870

Published: Jan. 1, 2025

Language: Английский

Citations

0
Assessment on the thermal efficiency of deep borehole heat exchangers under rock and soil heterogeneity DOI

Zhenggang Ba,

Ye Wang, Zhuang Zhao

et al.

Computers and Geotechnics, Journal Year: 2025, Volume and Issue: 180, P. 107075 - 107075

Published: Jan. 22, 2025

Language: Английский

Citations

0
Controlling injection conditions of a deep coaxial closed well heat exchanger to meet irregular heat demands: a field case study in Belgium (Mol) DOI Creative Commons
V. Leontidis, Edgar Hernández,

Justin Pogacnik

et al.

Geothermal Energy, Journal Year: 2025, Volume and Issue: 13(1)

Published: Jan. 30, 2025

Abstract Deep geothermal closed-loops have recently gained attention because of their advantages over classical applications (e.g., less dependence on the geology, no risk induced seismicity) and technological in drilling process, use alternative to water fluids). This paper deals with repurposing an existing well Mol, Belgium, by numerically evaluating closed-loop concept. Two numerical tools are used predict evolution temperature produced energy a period 20 years considering vertical coaxial complete geological morphology. Full-scale simulations initially carried out estimate maximum capacity highlight need control output adjusting inlet conditions. Simulations then performed either deliver constant power or cover irregular thermal demands two buildings applying both cases three process operations. Through controlling temperature, injected flow rate successively both, production excess energy, resulting from overdesign wellbore for specific application, is limited. The showed that continuous adjustments injection and/or needed restrict rapid drop outlet consequent depletion rocks, caused highly transient nature diffusive heat transfer rocks wellbore, as supply demand, irregular, long term. In fact, combination controls could be ideal strategy supplying demand at highest COP.

Language: Английский

Citations

0
A perspective on Paul Younger’s work on the Newcastle Science Central Deep Geothermal Borehole and new developments from the NetZero GeoRDIE project DOI Creative Commons
Christopher S. Brown, Isa Kolo, Gioia Falcone

et al.

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
Polynomial chaos-based uncertainty quantification of the performance of a closed loop deep geothermal borehole DOI Creative Commons
T.S. Charlton, Mohamed Rouainia

Geothermics, Journal Year: 2025, Volume and Issue: 129, P. 103271 - 103271

Published: Feb. 21, 2025

Language: Английский

Citations

0
Numerical Analysis of Inlet–Outlet Leg Barriers in Vertical Borehole Heat Exchangers: A Strategy to Mitigate the Thermal Resistance DOI Creative Commons

Asfia Nishat,

Hossam Abuel-Naga

Geotechnics, Journal Year: 2025, Volume and Issue: 5(1), P. 17 - 17

Published: March 1, 2025

The efficiency of heat transfer through borehole exchangers is influenced by the thermal resistances both and surrounding soil. Optimizing these can improve performance reduce system costs. Soil resistance geographically specific challenging to reduce, according previous research; in contrast, be minimized practical approaches, such as increasing conductivity grout or adjusting shank spacing U-tube configuration. literature also suggests that coaxial pipes are a more efficient design than single exchanger. A novel approach involves inserting physical barrier between U-tube’s inlet outlet legs short-circuiting and/or temperature distribution from leg borehole. Limited studies exist on technique its contribution reducing resistance. effects two different geometries, flat plate U-shape, made materials, with various soil conductivities configurations, were considered this study. Using FlexPDE software version 6.51, study numerically assesses This focuses sole mitigating an effective solution for optimizing exchangers, especially reduced lower It length up 8.1 m/kW transfer, offering viable alternative enhancing grout. Moreover, under conditions low medium conductivity, exchanger demonstrates reduction 43.4 m per kW (22.7%) overall compared pipes.

Language: Английский

Citations

0
Investigating the impact of groundwater flow on multi-lateral, U-Type, advanced geothermal systems DOI Creative Commons
Christopher S. Brown, Gioia Falcone

Applied Thermal Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 126269 - 126269

Published: March 1, 2025

Language: Английский

Citations

0
Repurposing Hydrocarbon Wells: A Geothermal Assessment and Filtering Framework DOI

A. Bhaskaran,

E. R. Okoroafor,

Roman Shor

et al.

SPE Western Regional Meeting, Journal Year: 2025, Volume and Issue: unknown

Published: April 25, 2025

Abstract The conversion of abandoned petroleum wells into geothermal presents a sustainable opportunity to repurpose idle infrastructure while advancing clean energy solutions. Abandoned wells, if left unaddressed, can pose significant environmental hazards, including methane emissions, groundwater contamination, and land subsidence, making their both necessity an for development. This study focuses on the Long Beach area, where approximately 4,900 exist, which around 400 are classified as idle. Using data collected from West Wilmington Oil Field Unit THUMS, detailed analysis was conducted 22 selected those near port residential areas. These were strategically chosen ensure comprehensive coverage facilities zones, allowing thorough evaluation feasibility in diverse land-use settings. methodology involved grouping based similarities wellbore design downhole equipment. From these groupings, four generalized well layouts developed, incorporating details such depths, casing configurations, cementing practices, other completion characteristics. Well trajectories, Build-and-Hold S-type, commonly considered conversion, they prevalent among wells. trajectories particularly advantageous due extended lateral sections optimal inclination angles, enhance heat extraction efficiency. Inclined boreholes, typical paths, also reduce total borehole length maintaining effective output. capabilities each layout assessed determine most suitable method structural feasibility. establishes framework filtering that be converted studied wells’ aims address legacy challenges contribute transition toward renewable systems reducing capital costs associated with system development by leveraging existing infrastructure. findings provide foundation optimizing strategies initiatives hydrocarbon basins worldwide.

Language: Английский

Citations

0
A numerical study on the sustainability and efficiency of Deep Coaxial borehole heat exchanger systems in the Cold Region of Northeast China DOI

Yongfa Ma,

Fengtian Yang,

Zhu Ruijie

et al.

Renewable Energy, Journal Year: 2024, Volume and Issue: 237, P. 121562 - 121562

Published: Oct. 9, 2024

Language: Английский

Citations

3