Regenerators play an important role in Stirling engines, pin-array stack regenerators have low flow resistance, to verify their advantages in Stirling engines, the heat transfer performance was explored theoretically, and the equivalent heat transfer coefficient and its influencing factors were obtained. The results show that the magnitude of equivalent heat transfer coefficient of this kind of regenerator can be up to 10⁵W/m²·K, indicating that the pin-array stack generator is satisfactory when used in Stirling engines. Equivalent heat transfer coefficient is influenced by three factors: the working frequency, radius and thermal diffusivity of pins. With the increase of frequencies, the heat transfer performance increase monotonously, while with the increase of radius, there are two extreme points. Based on this, two typical working conditions are determined, the thermally penetrated condition and the thermally unpenetrated condition, and the heat transfer performance of the thermally penetrated condition is good, but the thermally unpenetrated condition should be avoided. Based on the equivalent heat transfer coefficient, the regenerator size optimization criterion was proposed according to the target parameter of specific volume heat transfer capacity, and the optimal parameters can be obtained by setting the relative radius to be 1.

蓄热器在斯特林发动机中起着重要的作用，针阵列叠式蓄热器具有低流动阻力，以证明其在斯特林发动机中的优势，从理论上探讨了传热性能，并获得了等效传热系数及其影响因素。结果表明，这种蓄热体的等效传热系数可达到10 ⁵ W / m ^2。·K，表示在斯特林引擎中使用引脚阵列堆栈生成器时令人满意。等效传热系数受三个因素影响：引脚的工作频率，半径和热扩散率。随着频率的增加，传热性能单调增加，而随着半径的增加，存在两个极端。基于此，确定了两个典型的工作条件，即热渗透条件和热非渗透条件，并且热渗透条件的传热性能良好，但应避免热非渗透条件。在等效传热系数的基础上，根据单位体积传热能力的目标参数，提出了蓄热室尺寸的优化准则，