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A platform for research: civil engineering, architecture and urbanism
Experimental Study of High-Thermal Conductivity SiC Concrete Energy Piles
https://orcid.org/http://orcid.org/0000-0002-2130-5909
As a new carrier for collecting shallow geothermal energy, energy piles have been widely used around the world. However, the existing methods are limited by different factors, and they do not further improve the heat transfer efficiency. In this article, the preparation of a new high-thermal conductivity SiC concrete (HCSC) pile is described. Primarily, a study on the properties of HCSC is conducted, and its thermal conductivity properties are tested. Second, indoor model tests of HCSC piles are conducted, and the influences of the pile material, heat exchange pipe material, inlet and outlet water temperatures, and thermal exchange fluid flow rate on the efficiency of energy piles are analyzed. The results show that SiC particle gradation strongly influences the thermal conductivity of concrete, with an average thermal conductivity of 2.87 W/(mk); additionally, the maximum thermal conductivity reaches 3.72 W/(mk), which is three times higher than that of conventional concrete. The working efficiencies of SiC piles increase to 261%, which is greater than that of the conventional piles, with a maximum energy of 189.51 W/m. The inlet water temperature of 32 °C has an acceptable energy consumption ratio, and the maximum temperature difference between the inlet and outlet reaches 0.357 °C/m, with an average value of 0.255 °C/m. Within the first 10 h, the energy obtained by the new energy pile is 128.2 W/m, while that of the conventional group is only 60.45 W/m.
Experimental Study of High-Thermal Conductivity SiC Concrete Energy Piles
https://orcid.org/http://orcid.org/0000-0002-2130-5909
As a new carrier for collecting shallow geothermal energy, energy piles have been widely used around the world. However, the existing methods are limited by different factors, and they do not further improve the heat transfer efficiency. In this article, the preparation of a new high-thermal conductivity SiC concrete (HCSC) pile is described. Primarily, a study on the properties of HCSC is conducted, and its thermal conductivity properties are tested. Second, indoor model tests of HCSC piles are conducted, and the influences of the pile material, heat exchange pipe material, inlet and outlet water temperatures, and thermal exchange fluid flow rate on the efficiency of energy piles are analyzed. The results show that SiC particle gradation strongly influences the thermal conductivity of concrete, with an average thermal conductivity of 2.87 W/(mk); additionally, the maximum thermal conductivity reaches 3.72 W/(mk), which is three times higher than that of conventional concrete. The working efficiencies of SiC piles increase to 261%, which is greater than that of the conventional piles, with a maximum energy of 189.51 W/m. The inlet water temperature of 32 °C has an acceptable energy consumption ratio, and the maximum temperature difference between the inlet and outlet reaches 0.357 °C/m, with an average value of 0.255 °C/m. Within the first 10 h, the energy obtained by the new energy pile is 128.2 W/m, while that of the conventional group is only 60.45 W/m.
Experimental Study of High-Thermal Conductivity SiC Concrete Energy Piles
https://orcid.org/http://orcid.org/0000-0002-2130-5909
As a new carrier for collecting shallow geothermal energy, energy piles have been widely used around the world. However, the existing methods are limited by different factors, and they do not further improve the heat transfer efficiency. In this article, the preparation of a new high-thermal conductivity SiC concrete (HCSC) pile is described. Primarily, a study on the properties of HCSC is conducted, and its thermal conductivity properties are tested. Second, indoor model tests of HCSC piles are conducted, and the influences of the pile material, heat exchange pipe material, inlet and outlet water temperatures, and thermal exchange fluid flow rate on the efficiency of energy piles are analyzed. The results show that SiC particle gradation strongly influences the thermal conductivity of concrete, with an average thermal conductivity of 2.87 W/(mk); additionally, the maximum thermal conductivity reaches 3.72 W/(mk), which is three times higher than that of conventional concrete. The working efficiencies of SiC piles increase to 261%, which is greater than that of the conventional piles, with a maximum energy of 189.51 W/m. The inlet water temperature of 32 °C has an acceptable energy consumption ratio, and the maximum temperature difference between the inlet and outlet reaches 0.357 °C/m, with an average value of 0.255 °C/m. Within the first 10 h, the energy obtained by the new energy pile is 128.2 W/m, while that of the conventional group is only 60.45 W/m.
Experimental Study of High-Thermal Conductivity SiC Concrete Energy Piles
Int J Civ Eng
Wang, Yuxiao (author) / Du, Guangyin (author) / Shi, Gang (author) / Liu, Songyu (author)
International Journal of Civil Engineering ; 21 ; 647-664
2023-04-01
18 pages
Article (Journal)
Electronic Resource
English
Experimental study of capping for reinforced concrete piles
| Engineering Index Backfile | 1946
Engineering Index Backfile | 1910
Engineering Index Backfile | 1894