The conventional practice of underground thermal energy storage is burying heat exchange pipes into pre-drilled vertical holes, referred to as the borehole thermal energy storage . Heat transfer occurs by circulating heat carrier fluid through the pipes. However, the cost of drilling deep holes can cause a breakdown of a project .
Of the common sensible mediums for thermal energy storage, the ground enjoys the advantage of enormous quantity and being widely accessible , . The conventional practice of underground thermal energy storage is burying heat exchange pipes into pre-drilled vertical holes, referred to as the borehole thermal energy storage .
When used for underground solar energy storage, the results suggest that the mass flow rate should be reduced to save the operational cost of the circulation pump. This only causes a slight sacrifice of the rate of solar energy storage, less than 2%, as the mass flow rate is reduced from 0.3 to 0.05 kg/s.
In addition, during underground solar energy storage, temperature increase drives the moisture away from the storage zone . Correspondingly, a dry soil condition is usually assumed in the pure conduction analysis . Table 2. Details of the parametric study. Eq. (8) 3. Steady-state analysis
The rate of solar energy storage corresponding to the steady-state is supposed to be at the lowest level due to the gradual increase in the ground temperature. In addition, corresponding to the steady-state, there is no change in the temperature of the system, indicating that the model domain has been fully charged.
Utility-scale underground storage aligns seamlessly with these projects, providing a practical and scalable solution to support the expansion of H 2 utilization, production, and distribution on a global scale, fostering the transition toward a more sustainable energy future .
Thermal energy transfer around buried pipe infrastructure
One option for dual purpose infrastructure is heat recovery from urban water systems. [4], [5], [6] There are around 1 million kilometres of buried water supply and wastewater collection pipes in the UK, the vast majority of which are located within 1 m of the ground surface. 7 A reliable and all-year-round energy source can be available within these buried pipes, …
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A review of underground hydrogen storage systems: Current …
Underground geological formations have effectively stored H 2, as shown in the literature review. Geochemical, microbiological, hydrodynamic, and geomechanic factors affected by injected hydrogen are some of the key challenges in storing hydrogen in …
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Heat Transfer Performance and Operation Scheme of the Deeply …
Through in situ experiments and a simulation algorithm, the research investigated the heat transmission characteristics of the deeply buried pipe energy pile group and optimized different intermittent operation schemes.
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Underground solar energy storage via energy piles: An …
Energy piles, which embed thermal loops into the pile body, have been used as heat exchangers in ground source heat pump systems to replace traditional boreholes. Therefore, it is proposed to store solar thermal energy underground via energy piles.
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Underground solar energy storage via energy piles
Solar energy is the most feasible source to charge the ground manually. In this study, thermal performance of an energy pile-solar collector coupled system for underground solar energy storage was investigated using numerical modeling. The results suggested that a lower flow rate should be adopted for the energy pile-solar collector coupled ...
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A Multiphysics Simulation Study of the …
Drawing from existing research globally, this paper delves into four key aspects impacting the thermodynamic properties of energy piles: the design of buried pipes, pile structure, heat storage materials within the pipe …
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UNDERGROUND THERMAL ENERGY STORAGE
Solar heat of asphalt or concrete areas is extracted by integrated absorber pipes. The heat is stored in an underground geothermal energy storage (heating soil > 77°F). This seasonal …
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Underground and pipeline hydrogen storage
Underground storage of pure hydrogen: ... companies and laboratories to increase the efficiency of renewable energy resources and to find efficient methods of energy storage. 4.3. Biochemical transformations of underground hydrogen . Due to the high energy of electron–proton bonding in the hydrogen atom, hydrogen is chemically inactive at reservoir …
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Energy storage mechanism and modeling method of underground …
The proposed mechanism for storing large amounts of new energy in underground aquifers allows for the scaling of the energy storage system based on the …
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Underground Thermal Energy Storage | SpringerLink
Underground thermal energy storage (UTES) provide us with a flexible tool to combat global warming through conserving energy while utilizing natural renewable energy resources. Primarily, they act as a buffer to balance fluctuations in supply …
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Chapter 2 Underground Thermal Energy Storage
Underground Thermal Energy Storage 2.1 Introduction Nature provides storage systems between the seasons because thermal energy is passively stored into the ground and groundwater by the seasonal climate changes. Below a depth of 10–15 m, the ground temperature is not influenced and equals the annual mean air temperature. Therefore, average temperature of the ground is …
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Energy storage mechanism and modeling method of underground …
2 Heat transfer models for buried pipe heat exchangers; 3 The comprehensive performance of combined systems with multiple buried pipe arrays [20]. Injecting heat into underground aquifers using buried heat exchangers offers several advantages: (1) It can directly replace the heat transfer methods of traditional ATES technology, avoiding direct contact …
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Underground hydrogen storage: A comprehensive review
Underground storage is a proven way to store a huge amount of energy (electricity) after converting it into hydrogen as it has higher energy content per unit mass than other gases such as methane and natural gas. This paper reviews the technical aspects and feasibility of the underground storage of hydrogen into depleted hydrocarbon reservoirs, …
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Heat Transfer Mechanism of Heat–Cold …
Based on the constructed flow and heat transfer model in pipelines and reservoirs, this study first analyzes the temperature field evolution of a shallow buried pipe system (SBPS) under the alternate operation of …
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Underground Thermal Engermal Energy Storage Storage Concrete …
In this paper, the changes of concrete temperature with depth, radius, flow rate, specific heat and thermal conductivity are analyzed. The influence trend of these factors on …
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Heat Transfer Performance and Operation Scheme of the Deeply Buried …
Through in situ experiments and a simulation algorithm, the research investigated the heat transmission characteristics of the deeply buried pipe energy pile group and optimized different intermittent operation schemes.
Learn More
Underground Thermal Engermal Energy Storage Storage …
In this paper, the changes of concrete temperature with depth, radius, flow rate, specific heat and thermal conductivity are analyzed. The influence trend of these factors on the concrete temperature field around the buried pipe of the heat storage pile is summarized. Classification number: TK521 Document identification code: A.
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Energy storage mechanism and modeling method of underground …
The proposed mechanism for storing large amounts of new energy in underground aquifers allows for the scaling of the energy storage system based on the capacity of curtailed power. This approach enables the effective utilization of new energy while exhibiting excellent thermal storage efficiency. This ATES system uses underground heat ...
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Underground Thermal Energy Storage | SpringerLink
Underground thermal energy storage (UTES) provide us with a flexible tool to combat global warming through conserving energy while utilizing natural renewable energy resources. Primarily, they act as a buffer to balance …
Learn More
HEATSTORE – Underground Thermal Energy Storage (UTES) – …
Proceedings World Geothermal Congress 2020+1 Reykjavik, Iceland, April - October 2021 1 HEATSTORE – Underground Thermal Energy Storage (UTES) – State of the Art, Example Cases and Lessons Learned Anders J. Kallesøe1, Thomas Vangkilde-Pedersen1, Jan E. Nielsen2, Guido Bakema3, Patrick Egermann4, Charles Maragna5, Florian Hahn6, Luca Guglielmetti7 …
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UNDERGROUND THERMAL ENERGY STORAGE
Solar heat of asphalt or concrete areas is extracted by integrated absorber pipes. The heat is stored in an underground geothermal energy storage (heating soil > 77°F). This seasonal stored heat can then be extracted in the winter by a heat pump and be used for space heating.
Learn More
Underground and pipeline hydrogen storage
the underground storage of the gas in an aquifer, depleted gas reservoir, or salt cavern, and a . gas-fired turbine for conversion of the gas to electricity or for direct use as fuel (Figure 4.4 ...
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Underground solar energy storage via energy piles
Solar energy is the most feasible source to charge the ground manually. In this study, thermal performance of an energy pile-solar collector coupled system for underground …
Learn More
Heat Transfer Mechanism of Heat–Cold Alternate …
Based on the constructed flow and heat transfer model in pipelines and reservoirs, this study first analyzes the temperature field evolution of a shallow buried pipe system (SBPS) under the alternate operation of heat–cold extraction, and then discusses the heat transfer performance under different pipeline flow rates, pipeline wall thermal cond...
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Underground solar energy storage via energy piles: An …
Energy piles, which embed thermal loops into the pile body, have been used as heat exchangers in ground source heat pump systems to replace traditional boreholes. …
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Underground Gravity Energy Storage: A Solution for Long-Term Energy Storage
This article suggests using a gravitational-based energy storage method by making use of decommissioned underground mines as storage reservoirs, using a vertical shaft and electric motor ...
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Performance of a full-scale energy pile for underground solar energy …
Energy piles, which are combinations of BHEs with pile foundations, could be used for underground energy exchange without the need for drilling holes [[30], [31], [32]].Energy piles have been combined with ground source heat pump (GSHP) systems for building heating or cooling for years [33].More recently, energy piles have also been employed for geothermal …
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A Multiphysics Simulation Study of the Thermomechanical …
Drawing from existing research globally, this paper delves into four key aspects impacting the thermodynamic properties of energy piles: the design of buried pipes, pile structure, heat storage materials within the pipe core, and soil treatment around the pile using carbon fiber urease mineralization.
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A review of underground hydrogen storage systems: Current …
Underground geological formations have effectively stored H 2, as shown in the literature review. Geochemical, microbiological, hydrodynamic, and geomechanic factors …
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Assesment for optimal underground seasonal thermal energy storage
An optimal design for seasonal underground energy storage systems is presented. This study includes the possible use of natural structures at a depth of 100 to 500 m depth. For safety reasons the storage fluid considered is water at an initial temperature of 90 °C. A finite element method simulation using collected data on the thermal ...
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