Citation: | HAO Junhong, WU Xuefeng, ZHANG Shining, TIAN Liang, GE Zhihua. Normalized Dynamic Characterization and Application of Multiple Heat Storage Materials Based on Standard Thermal Resistance[J]. Applied Mathematics and Mechanics, 2022, 43(11): 1227-1237. doi: 10.21656/1000-0887.430231 |
Based on the standard thermal resistance and the heat current method, the transient heat transfer thermal resistance between the heat storage material and the heat transfer fluid was deduced. With the analog circuit analysis method, the transient heat current model and dynamic response time constants of heat storage-heat exchange processes were obtained. Based on this model, the node temperature was introduced for refining the heat transfer thermal resistance, and the transient heat current model for the 3rd-order circuit coupled with the heat storage and heat transfer processes was obtained. Numerical simulation verification and application comparison indicate that, the normalized dynamic model based on multiple time constants is feasible to characterize the dynamic characteristics of heat storage materials, and can directly compare and analyze different heat exchange and heat storage materials. The case study shows that, for the heat exchange with solid heat storage materials, the liquid metal has better dynamic heat exchange capacity than the molten salt, while for the heat exchange with ceramic materials, the air reaches the steady state faster than water vapor and CO2.
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