Thermal Performance of an Energy Pile Group with a Deeply Penetrating U-shaped Heat Exchanger
| Autor: | Jiannan Chen, Weidong Lyu, Hefu Pu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Control and Optimization
Materials science 020209 energy Multiphysics Energy Engineering and Power Technology 02 engineering and technology lcsh:Technology deeply penetrating U-shaped configuration 020401 chemical engineering Thermal Heat exchanger 0202 electrical engineering electronic engineering information engineering Tube (fluid conveyance) 0204 chemical engineering Electrical and Electronic Engineering heat exchanger Engineering (miscellaneous) lcsh:T Renewable Energy Sustainability and the Environment business.industry pile group Geothermal energy Mechanics energy piles Heat transfer geothermal energy parametric analysis Pile business Energy (signal processing) Energy (miscellaneous) |
| Zdroj: | Energies Volume 13 Issue 21 Energies, Vol 13, Iss 5822, p 5822 (2020) |
| ISSN: | 1996-1073 |
| DOI: | 10.3390/en13215822 |
| Popis: | This study presents a novel heat exchanger configuration, called a deeply penetrating U-shaped configuration, for energy piles. The outlet water temperature, temperature variation along the tube, and heat transfer rate are simulated and computed using Comsol Multiphysics software. The simulations are for the cooling mode. The proposed configuration is compared with traditional U-shaped and W-shaped configurations to prove its superiority. The thermal performance of the pile group is compared with that of a single pile to investigate the effects of the pile group on the heat transfer. A parametric analysis is performed to investigate the effects of several important parameters (i.e., pile spacing, pile diameter, soil type, and thermal parameters) on the heat transfer performance of an energy pile group with the proposed deeply penetrating U-shaped configuration. The results indicate that the corner pile indicates a nonnegligible heat transfer rate 6.8% and 9.9% higher than the central pile in quincuncial and squared arrangements. Purely from the standpoint of thermal performance, the pile spacing is recommended to be more than 6.8 times the pile diameter to reduce the influence of the pile group on the heat transfer capacity. |
| Databáze: | OpenAIRE |
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