Enhanced heat extraction for deep borehole heat exchanger through the jet grouting method using high thermal conductivity material

Han, Yingbo; Xu, Tianfu; Yuan, Yilong; Gherardi, Fabrizio; Feng, Bo; Jiang, Zhenjiao; Hu, Zixu

doi:10.1016/j.renene.2021.06.059

Cited by 23 publications

(9 citation statements)

References 24 publications

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“…Numerical simulations have been conducted to verify the performance of EDBHE production for 30 years. The findings showed that the average annual heat production rate in this period of EDBHE is 463.2 KW, equal to 1.27 times compared to DBHE and that the heat production rate and outlet temperature depend mainly on the artificial soil concrete area [17]. The results demonstrated that the energy extracted from EDBHE is 1002.4 KW and 424.45 KW from DBHE equivalent to 2.36 times, as well as the fixed payback period of 3.12 years and 7.17 years for DBHE, which paves the way to expansion and acceleration of EDBHE systems in the future.…”

Section: Introductionmentioning

confidence: 86%

Enhancing Geothermal Wellbore Heat Exchanger Performance Through Rectangular Protrusion Integration in Repurposed Abandoned Oil Wells

Belaghit,

Saim

2024

IJHT

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In the field of scientific exploration, this study delves into the captivating realm of ground heat exchangers (GHE) by investigating the impact of rectangular protrusions strategically incorporated at the base of these systems. As vital components within geothermal systems, GHEs are responsible for efficiently transferring of thermal energy between the earth and the working fluid. However, through the ingenious integration of rectangular protuberances, the convective heat transfer dynamics within GHEs can be skillfully manipulated, potentially leading to remarkable enhancements in the heat exchange process. The maximum percentage increase in the heat transfer rate reached 23% at a distance of 2,500 meters, emphasizing the importance of strategic positioning of the protrusions. The primary objective of this research endeavor is to comprehensively examine the effects of these protrusions on the extracted temperature of the injected working fluid, thus yielding invaluable insights for optimizing GHE performance and advancing of geothermal energy utilization.

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Section: Introductionmentioning

confidence: 86%

Enhancing Geothermal Wellbore Heat Exchanger Performance Through Rectangular Protrusion Integration in Repurposed Abandoned Oil Wells

Belaghit,

Saim

2024

IJHT

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“…Some researchers have also gone further to investigate enhanced thermal conductivity zones using a soilcrete zone created through jet grouting, enhancing the thermal power by 1.27 times in contrast to normal grout (Yu et al 2021). However, Yu et al (2021) conclude that the length/radius of the zone are more important than its thermal conductivity considering typical ranges. Some studies have considered insulation of the DBHE casing and inner pipe.…”

Section: Impact Of Engineering Parametersmentioning

confidence: 99%

A comprehensive review of deep borehole heat exchangers (DBHEs): subsurface modelling studies and applications

Kolo,

Brown,

Nibbs

et al. 2024

Geotherm Energy

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Deep borehole heat exchangers (DBHEs) with depths exceeding 500 m have been researched comprehensively in the literature, focusing on both applications and subsurface modelling. This review focuses on conventional (vertical) DBHEs and provides a critical literature survey to analyse (i) methodologies for modelling; (ii) results from heat extraction modelling; (iii) results from modelling deep borehole thermal energy storage; (iv) results from heating and cooling models; and (v) real case studies. Numerical models generally compare well to analytical models whilst maintaining more flexibility, but often with increased computational resources. Whilst in-situ geological parameters cannot be readily modified without resorting to well stimulation techniques (e.g. hydraulic or chemical stimulation), engineering system parameters (such as mass flow rate of the heat transfer fluid) can be optimised to increase thermal yield and overall system performance, and minimise pressure drops. In this active research area, gaps remain, such as limited detailed studies into the effects of geological heterogeneity on heat extraction. Other less studied areas include: DBHE arrays, boundary conditions and modes of operation. A small number of studies have been conducted to investigate the potential for deep borehole thermal energy storage (BTES) and an overview of storage efficiency metrics is provided herein to bring consistency to the reporting of thermal energy storage performance of such systems. The modifications required to accommodate cooling loads are also presented. Finally, the active field of DBHE research is generating a growing number of case studies, particularly in areas with low-cost drilling supply chains or abandoned hydrocarbon or geothermal wells suitable for repurposing. Existing and planned projects are thus presented for conventional (vertical) DBHEs. Despite growing interest in this area of research, further work is needed to explore DBHE systems for cooling and thermal energy storage.

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“…Another endeavour involves implementing an alert system for sensors that measure temperature and humidity [11]. A temperature and humidity rise, followed by an alarm, would go unreported, necessitating the use of a durable device that incorporates an alerting and data recording system to report temperature readings monitored by the sensor via SMS to the user or responsible party [12]. A limited number of manufacturers have integrated microprocessors into their products for the past three decades in order to reduce the number of circuits and, consequently, the price paid by end users [13].…”

Section: Review Of Literaturementioning

confidence: 99%

Dynamic Control and Performance Evaluation of Microcontroller-Based Smart Industrial Heat Extractor

Essien

2023

EJCSIT

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Dynamic control and performance evaluation of a microcontroller-based smart industrial heat extractor involves the implementation of control strategies and the assessment of its performance under dynamic operating conditions. Performance evaluation aims to assess the effectiveness and efficiency of the microcontroller-based smart industrial heat extractor under dynamic conditions. Industrial heat extraction systems are often complex, involving multiple components, sensors, actuators, and control algorithms. Understanding and modelling the dynamic behaviour of these systems can be challenging, especially when considering factors like heat transfer rates, thermal delays, and interactions between different system elements. The effectiveness of dynamic control is significantly dependent on precise and dependable measurements from sensors. Sensors deployed in industrial settings may encounter severe environmental conditions, which can result in possible inaccuracies, drift, or even malfunctions. The objective of this research is to propose a simulated methodology for verifying the efficacy of a microcontroller-driven intelligent heat extractor utilised in industrial settings. The execution of experiments or tests within industrial environments can be a costly and time-intensive endeavour, and may entail potential hazards. The efficacy of a smart industrial heat extractor in practical industrial settings can be ascertained through the simulation of its evaluation process, thereby mitigating potential risks. The model designed and simulated in this work utilises an integrated temperature sensor to determine the ambient temperature and transmits a signal to the Arduino UNO microcontroller when the temperature sensor detects variant temperatures ranges. The evaluation is performed by comparing the behaviour and performance of the simulated system with predefined performance metrices.

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Enhanced heat extraction for deep borehole heat exchanger through the jet grouting method using high thermal conductivity material

Cited by 23 publications

References 24 publications

Enhancing Geothermal Wellbore Heat Exchanger Performance Through Rectangular Protrusion Integration in Repurposed Abandoned Oil Wells

Enhancing Geothermal Wellbore Heat Exchanger Performance Through Rectangular Protrusion Integration in Repurposed Abandoned Oil Wells

A comprehensive review of deep borehole heat exchangers (DBHEs): subsurface modelling studies and applications

Dynamic Control and Performance Evaluation of Microcontroller-Based Smart Industrial Heat Extractor

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