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.
First, underground space can provide a stable and ample operation space for the energy storage system, protecting the devices from the impacts of extreme weather like rainstorms, typhoons, and blizzards (Zhang et al., 2021).
As an important support technology of renewables, energy storage system is of great significance in improving the resilience of the power system. In this paper, a resilience enhancement method for power systems with high penetration of renewable energy based on underground energy storage systems (UESS) is proposed.
Ma and Wang proposed using energy piles to store solar thermal energy underground in summer, which can be retrieved later to meet the heat demands in winter, as schematically illustrated in Fig. 1. A mathematical model of the coupled energy pile-solar collector system was developed, and a parametric study was carried out.
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Energy storage needs to account for the intermittence of solar radiation if solar energy is to be used to answer the heat demands of buildings. Energy piles, which embed …
This paper clarifies the framework of underground energy storage systems, including underground gas storage (UGS), underground oil storage (UOS), underground …
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 …
Energy storage needs to account for the intermittence of solar radiation if solar energy is to be used to answer the heat demands of buildings. Energy piles, which embed thermal loops into …
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 …
Large-scale underground energy storage technology uses underground spaces for renewable energy storage, conversion and usage. It forms the technological basis of achieving …
Ochs et al. reported an experimental study of underground energy storage for solar energy, and proposed the concepts of humidity permeability in high temperature and heat …
In the current energy transition towards a sustainable economy, large-scale energy storage systems are required to increase the integration of intermittent renewable energies, …
One way to ensure large-scale energy storage is to use the storage capacity in underground reservoirs, since geological formations have the potential to store large volumes …
As an important support technology of renewables, energy storage system is of great significance in improving the resilience of the power system. In this paper, a resilience …
Underground thermal energy storage (UTES) is a form of STES useful for long-term purposes owing to its high storage capacity and low cost (IEA I. E. A., 2018). UTES effectively stores the …
In this study, thermal performance of an energy pile-solar collector coupled system for underground solar energy storage was investigated using numerical modeling.
In this paper, on the base of the future development of clean and low-carbon energy, the concept and connotation of underground energy storage engineering (UESE) was …
At that time, wind and solar power will generate approximately 2.6 × 10 13 kW·h (approximately 25% will originate from energy storage coupled with power-to-X, of which more …
The preliminary experimental and theoretical studies on the performance of the energy pile for underground solar thermal energy storage conducted by Ma et al. [42,43] …
Underground energy storage facilities are capable of storing a range of energy types, notably including compressed air, thermal energy, and chemical energy. Compressed …
Researchers in the Stanford School of Sustainability have patented a sustainable, cost-effective, scalable subsurface energy storage system with the potential to revolutionize …
At that time, wind and solar power will generate approximately 2.6 1013 kW h (approximately 25% will originate from energy storage coupled with power-to-X, of which more than 80% will be …
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