Performance of Ground Energy Systems Installed in Foundations

安装在地基中的地面能源系统的性能

• 批准号: EP/H049010/1
• 负责人: William Powrie
• 金额: $ 60.87万
• 依托单位: University of Southampton
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2010
• 资助国家: 英国
• 起止时间: 2010 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FH049010%2F1
• 关键词: Performance; Ground; Energy; Systems; Installed

The UK and the European Union have legally binding targets for reducing carbon dioxide emissions and for the increasing renewable energy generation. As about 25% to 33% of the UK's annual energy usage is expended on space heating, the provision of renewable heat energy is an area of critical importance if emissions and energy targets are to be achieved. Increased use of ground energy systems within foundations and other underground structures would be beneficial in both these respects, and will be eligible for financial support through the forthcoming government Renewable Heat Incentive. However, despite a recent increase in the use of ground energy systems, there remain key areas of uncertainty about their performance. This is especially important in the long term, where multiple installations will interact with each other and where unbalanced heating or cooling loads will lead to changes in the thermodynamic regime in the ground. This project aims to address some of the uncertainties surrounding ground energy systems installed in foundations by comprehensively instrumenting and monitoring two sites in contrasting ground conditions. This will allow the real response of the ground to known heating and cooling loads to be measured, and comparisons made with predictions based on analytical and numerical models. The use of contrasting geological regimes will allow investigation of the impact of groundwater on the performance of systems, something rarely considered and not well understood. The field monitoring will be accompanied by a programme of in situ and laboratory testing to assess differences in thermal behaviour at different scales and temperatures relevant to ground energy systems. The testing programme will address questions relating to degrees of uncertainty in determining key thermal properties and how this may compare with other uncertainties in the system design, such as heating/cooling loads. Numerical modelling, including back analysis of the in situ thermal response testing and operation of the ground energy systems, will allow assessment of the sensitivity of the systems to different input parameters. The modelling will also allow evaluation of the numerical and analytical techniques currently used for the design of ground energy systems and assessment of the importance of key factors (geological variation, groundwater, surface boundary conditions, geothermal gradient) not currently accounted for in existing methods. Taken together, the various strands to the project are expected to provide an important dataset which will add substantially to the understanding of the performance of ground energy systems. By addressing uncertainties surrounding design input parameters, geological conditions and design approaches, the project will also provide relevant lessons for direct application to the design and construction of ground energy systems installed in foundations, which it is expected will ultimately form part of improved guidance for industry.

英国和欧盟制定了具有法律约束力的减少二氧化碳排放和增加可再生能源发电的目标。由于英国每年约 25% 至 33% 的能源消耗用于空间供暖，如果要实现排放和能源目标，提供可再生热能是至关重要的领域。在地基和其他地下结构内增加地面能源系统的使用将在这两方面都有好处，并将有资格通过即将推出的政府可再生热能激励计划获得财政支持。然而，尽管最近地面能源系统的使用有所增加，但其性能仍然存在不确定性的关键领域。从长远来看，这一点尤其重要，因为多个装置将相互影响，并且不平衡的加热或冷却负荷将导致地下热力学状态的变化。该项目旨在通过在对比地面条件下对两个地点进行全面检测和监测，解决安装在地基中的地面能源系统的一些不确定性。这将允许测量地面对已知热负荷和冷负荷的真实响应，并与基于分析和数值模型的预测进行比较。使用对比地质状况将允许调查地下水对系统性能的影响，这是很少考虑和未充分理解的。现场监测将伴随着现场和实验室测试计划，以评估与地面能源系统相关的不同规模和温度下热行为的差异。测试计划将解决与确定关键热性能的不确定性程度相关的问题，以及如何将其与系统设计中的其他不确定性（例如加热/冷却负载）进行比较。数值建模，包括现场热响应测试和地面能源系统运行的反分析，将允许评估系统对不同输入参数的敏感性。该模型还将允许评估目前用于地面能源系统设计的数值和分析技术，并评估现有方法中目前未考虑的关键因素（地质变化、地下水、地表边界条件、地温梯度）的重要性。总而言之，该项目的各个部分预计将提供一个重要的数据集，这将大大增加对地面能源系统性能的理解。通过解决设计输入参数、地质条件和设计方法的不确定性，该项目还将为直接应用于安装在地基中的地面能源系统的设计和施工提供相关经验教训，预计最终将成为改进的行业指南的一部分。

项目成果

Influences on the thermal efficiency of energy piles

对能源堆热效率的影响

• DOI: 10.1016/j.energy.2015.02.001
• 发表时间: 2015-03-15
• 期刊: Energy
• 影响因子: 9
• 作者: F. Cecinato;F. Loveridge
• 通讯作者: F. Loveridge

Assessing the applicability of thermal response testing to energy piles

评估热响应测试对能源堆的适用性

• 作者: Fleur Loveridge (Author)

New technologies and applications: materials and equipment in near surface geothermal systems

新技术与应用：近地表地热系统材料与设备

• DOI: 10.1179/1937525514y.0000000012
• 发表时间: 2014-10-01
• 期刊: DFI Journal - The Journal of the Deep Foundations Institute
• 作者: R. Katzenbach;C. Olgun;F. Loveridge;M. Sutman;G. A. Bowers;J. McCartney;L. Laloui;T. Mimouni;F. Dupray;J. Spitler;F. Clauss;L. L. Meyer;G. Akrouch
• 通讯作者: G. Akrouch

Identifying best practice, installation, laboratory testing and field testing

确定最佳实践、安装、实验室测试和现场测试

• DOI: 10.1179/1937525514y.0000000006
• 发表时间: 2014-10-01
• 期刊: DFI Journal - The Journal of the Deep Foundations Institute
• 作者: T. Amis;J. McCartney;F. Loveridge;C. Olgun;M. E. Bruce;K. D. Murphy
• 通讯作者: K. D. Murphy

Measuring soil thermal properties for use in energy foundation design

测量土壤热特性用于能源基础设计

• 发表时间: 2013-09-01
• 作者: Jasmine E. Low;F. Loveridge;W. Powrie
• 通讯作者: W. Powrie