QI Xuedong,LI haixing,CUI Hongzhi,et al.Measurement of Thermodynamic Parameters of Energy Pile Test Materials[J].Journal of Disaster Prevention and Mitigation Engineering,2022,42(05):929-936.
QI Xuedong,LI haixing,CUI Hongzhi,et al.Measurement of Thermodynamic Parameters of Energy Pile Test Materials[J].Journal of Disaster Prevention and Mitigation Engineering,2022,42(05):929-936. DOI: 10.13409/j.cnki.jdpme.20211120050.
Measurement of Thermodynamic Parameters of Energy Pile Test Materials
This paper proposes to add phase change materials and steel fibers to the traditional concrete energy pile to improve the heat transfer efficiency of the energy pile. By encapsulating phase change materials with steel balls, the phase change materials are not only applied to concrete, but also the high thermal conductivity of steel fibers and steel balls can improve the thermal conductivity of phase change materials and improve the thermal conductivity of phase change energy storage concrete. It provides a reference basis for the application of phase change materials in energy pile engineering. Through the specific process and results of different thermodynamic parameters of phase change steel fiber reinforced concrete, it is found that there is no obvious fragment and collapse in the failure of fiber reinforced concrete. Because the bond stress between steel fiber and concrete on both sides of the crack restricts the development of crack, so as to reduce the brittle failure degree of concrete. In addition, the steel fiber can well compensate for the defects caused by low thermal conductivity phase change materials to improve the overall thermal conductivity of the energy pile. The Steel fiber will reduce the specific heat capacity of concrete, but the sand ratio has an obvious effect on the specific heat capacity of concrete. This result will provide parameter guidance for the subsequent evaluation and optimization of the energy pile heat exchange system.
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