固体蓄热器无论作为热电联产机组（CHP）的配置系统还是作为清洁电力的消纳系统都起到一定的“削峰填谷”作用。为了提高固体蓄热器的蓄热效率及蓄热容量，首先对工程常用蓄热体结构的蓄热过程提出了一种热物理参数非定值分析方法，并通过实验验证了该数值分析方法的可靠性。对现有蓄热体结构提出截面和功率分布的优化方式，通过建立数值分析方法对优化前后蓄热体结构进行蓄热性能比较，得出截面优化方式和功率分布优化方式在10 h时刻的最高温度分别降低了3.6%和4.0%， 在600 ℃目标温度下的蓄热容量分别提高了5.0%和6.5%。结合截面优化和功率分布优化的特点进而提出复合优化方式，该优化方式具有横、纵两个方向的优化效果，与无优化结构的蓄热体相比，在10 h时刻的最高温度降低率和600 ℃目标温度下的蓄热容量提高率分别为7.2%和11.0%。

Solid heat accumulator plays a certain role of peak load shifting, whether it is used as the configuration system of combined heat and power (CHP) unit or as the consumption system of clean electricity.In order to improve the heat storage efficiency and capacity of solid heat accumulator, an unsteady value analysis method of thermophysical parameters is proposed firstly for heat storage process of heat accumulator structure commonly used in engineering, and the reliability of the numerical analysis method is verified by experiments.The optimization method of section and power distributions for existing regenerator structure is put forward.By establishing numerical analysis method, the heat storage performances of regenerator structure before and after optimization are compared. The results show that the maximum temperatures of section optimization method and power distribution optimization method are reduced by 3.6% and 4.0% respectively at 10 h, and the heat storage capacities of those are increased by 5.0% and 6.5% respectively at the target temperature of 600 ℃.Combined with the characteristics of section optimization and power distribution optimization,a compound optimization method is proposed furtherly, which has the optimization effects in both horizontal and vertical directions.Compared with the regenerator without optimization structure,the maximum temperature reduction rate at 10 h and the heat storage capacity improvement rate at target temperature of 600 ℃ are 7.2% and 11.0% respectively.

TK513.5