Abstract
Energy storage pile foundations are being developed for storing renewable energy by utilizing compressed air energy storage technology. Previous studies on isolated piles indicate that compressed air can result in pressure and temperature fluctuations in the pile, which can further affect safety of the pile foundation. Meanwhile, the temperature changes and distributions for the pile and surrounding soil also are influenced by adjacent piles in typical group pile constructions. Therefore, dynamic thermal transfer simulations were conducted in this paper to investigate the temperature changes and distributions in the concrete pile and surrounding soil for group pile construction. The main parameter in this study is the spacing of the piles. The analysis results show that the group pile effect significantly increases the temperature up to more than 100 °C depending on the location and changes its distribution in both concrete and soil due to the heat transferred from the adjacent piles. The final stabilized temperature can be as high as 120 °C in the concrete pile and 110 °C in the soil after numerous loading cycles, which is about 4 times higher than typical thermo-active energy pile applications. Thus, it is important to include the group pile effect for design and analysis of the energy storage pile foundation.
Highlights
A common method for utilizing renewable energy is to immediately generate electric power for operation of the building via solar panels that are directly attached to residential or commercial buildings [1]
Reinforced concrete pile foundations have been proposed for renewable energy storage by utilizing compressed air energy storage (CAES) technology [3,4]
Sci. 2020, 10, 6597 this paper presents a study on the temperature changes and distributions for the group pile construction sinceAppl
Summary
A common method for utilizing renewable energy is to immediately generate electric power for operation of the building via solar panels that are directly attached to residential or commercial buildings [1]. Similar thermal transfer analyses and temperature distribution studies conducted extensively model was subjected to fluctuating temperature inputs applied to the innerwere surface of the concrete for thermo-active pilewas foundations [8,9,10,11,12,13,14,15,16,17,18,19] In these studies, the pile was treated as a heat for heat pile. Similar thermal transfer and temperature studies were conducted surface fluctuates seasonally while analyses the underground temperatedistribution remains constant In these studies, the pile was treated as a heat behavior for the energy storage pile discussed in this paper is different from that of the thermo-active absorber for heat exchange between the ground surface and underground regions since the pile foundation.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
