Energy foundations and other thermo-active ground structures
Energy foundations and other thermo-active ground structures
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DOI：
10.1680/geot.2006.56.2.81
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发表时间：
2006-03-01
期刊：
影响因子：
5.8
通讯作者：
Brandl, H
中科院分区：
文献类型：
--
作者：
Brandl, H
能源基础和其他热活性地面结构、能源威尔斯和路面加热代表了一种创新技术，有助于环境保护，并提供大量的长期成本节约和最小化的维护。本文重点介绍了由于结构原因已经需要的与地面接触的混凝土元件，但同时也作为热交换器工作。填充有载热流体的吸收器管道安装在传统的结构元件（桩、发夹、地下连续墙、地下室底板或墙壁、隧道衬砌）内，形成地热能系统的主回路。冬季利用自然地温作为热源，夏季用于降温。因此，无需在地面下安装额外的元件。然后，主回路通过热泵连接到建筑物内的次级回路。“自由冷却”甚至可以在没有热泵的情况下运行。本文介绍了在地面的热传递，吸收液和混凝土/土壤之间。温度引起的土壤性质的变化或基础的行为也进行了讨论，并建议设计和操作。试点研究项目和案例弥合了理论与实践之间的差距，特殊应用揭示了地热岩土工程的广阔领域。
Energy foundations and other thermo-active ground structures, energy wells, and pavement heating represent an innovative technology that contributes to environmental protection and provides substantial long-term cost savings and minimised maintenance. The paper focuses on earth-contact concrete elements that are already required for structural reasons, but which simultaneously work as heat exchangers. Absorber pipes filled with a heat carrier fluid are installed within conventional structural elements (piles, barrettes, diaphragm walls, basement slabs or walls, tunnel linings), forming the primary circuit of a geothermal energy system. The natural ground temperature is used as a heat source in winter and for cooling in summer. Hence no additional elements have to be installed below surface. The primary circuit is then connected via a heat pump to a secondary circuit within the building. 'Free cooling' may even run without a heat pump. The paper describes heat transfer in the ground, and between absorber fluid and concrete/soil. Temperature-induced changes of soil properties or of foundation behaviour are also discussed, and recommendations for design and operation are given. Pilot research projects and case histories bridge the gap between theory and practice, and special applications reveal the wide field of geothermal geotechnics.