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Performance of geothermal energy piles in buildings: A bibliometric analysis and systematic review
Energy and Buildings ( IF 6.6 ) Pub Date : 2025-01-23 , DOI: 10.1016/j.enbuild.2025.115357
Muhammad Abubakar Baffa, Zahiraniza Mustaffa, Niraku Rosmawati Ahmad, Mohamed E. El-Atroush, Nura Shehu Aliyu Yaro, Mohamed El Amine Ben Seghier

The adoption of Geothermal Energy Piles (GEPs) as an alternative renewable energy source for heating and cooling demand of buildings continues to grow rapidly. This study presents an integrated approach wherein a bibliometric analysis and systematic review are employed to offer a holistic overview of the performance of GEPs in buildings. The trend of research in the area, key contributing countries, and keyword co-occurrence networks were analyzed. The commonly studied variables were classified and discussed based on methodologies of investigations. Findings of the studies were generally found to branch into thermal performance and thermo-mechanical behavior of GEPs. Furthermore, heat exchange rate was found to be a key factor among other variables on thermal performance and is significantly affected by flow rate and the gradient between the outlet and inlet temperature of the heat carrier fluid. Similarly, pile head settlement and shaft friction were found to be a key factor on thermo-mechanical behavior. An increase in axial stresses due to thermal loading was also commonly reported, in some cases reaching up to twice the level experienced under purely mechanical loading and should therefore not be overlooked in GEP design. Finally, this paper identifies research gaps and outlines prospective future directions for the performance of GEPs in buildings.

中文翻译:


建筑物中地热能桩的性能:文献计量分析与系统评价



地热能桩 (GEP) 作为替代可再生能源,用于建筑物的供暖和制冷需求继续快速增长。本研究提出了一种综合方法,其中采用文献计量分析和系统评价来全面概述 GEP 在建筑物中的性能。分析了该地区的研究趋势、主要贡献国家和关键词共现网络。根据调查方法对常用研究的变量进行分类和讨论。研究结果通常发现分支到 GEP 的热性能和热机械行为。此外,发现热交换率是影响热性能的其他变量中的一个关键因素,并且受流速以及热载流流体出口和入口温度之间的梯度的显着影响。同样,发现桩头沉降和轴摩擦是热机械行为的关键因素。由于热载荷引起的轴向应力增加也很常见,在某些情况下,其水平是纯机械载荷下的两倍,因此在 GEP 设计中不应忽视。最后,本文确定了研究差距,并概述了 GEP 在建筑物中性能的前瞻性未来方向。
更新日期:2025-01-23
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