The buried pipe element method can be used to calculate the temperature of mass concrete through highly efficient computing. However, in this method, temperatures along cooling pipes and the convection coefficient of the cooling pipe boundary should be improved to achieve higher accuracy. Thus, there is a need to propose a method for improvement.
According to the principle of heat balance and the temperature gradient characteristics of concrete around cooling pipes, a method to calculate the water temperature along cooling pipes using the buried pipe element method is proposed in this study. By comparing the results of a discrete algorithm and the buried pipe element method, it was discovered that the convection coefficient of the cooling pipe boundary for the buried pipe element method is only related to the thermal conductivity of concrete; therefore, it can be calculated by inverse analysis.
The results show that the buried pipe element method can achieve the same accuracy as the discrete method and simulate the temperature field of mass concrete with cooling pipes efficiently and accurately.
This new method can improve the calculation accuracy of the embedded element method and make the calculation results more reasonable and reliable.
This research was supported by the National Key Research and Development Project of China (Grant No. 2018YFC0406703), the National Natural Science Foundation of China (Grant No. 51779277, 51579252 and 51439005), the Special Scientific Research Project of the State Key Laboratory of Simulation and Regulation of Water Cycles in River Basins (2016ZY10), Special Scientific Research Project of the China Institute of Water Resources and Hydropower Research (Grant No. SS0145B392016 and SS0145B612017) and the Special Scientific Research Project of the China Institute of Water Resources and Hydropower Research (KY1799).
Special thanks are also given to Chao Wu for his work in translating Chinese into English in some chapters of this paper.
Zhu, Z., Liu, Y., Fan, Z., Qiang, S., Xie, Z., Chen, W. and Wu, C. (2020), "Improved buried pipe element method for temperature-field calculation of mass concrete with cooling pipes", Engineering Computations, Vol. ahead-of-print No. ahead-of-print. https://doi.org/10.1108/EC-09-2019-0439Download as .RIS
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