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斯特林发动机由于其外部加热特性适合用于分布式供能系统而正在得到越来越多的重视。斯特林机运转时,其内部工质的压力传递变化特性决定了输出机械功率的大小。本文首先采用施密特分析法对自主研制的某型斯特林机在预充氦气压力为2 MPa的工况下计算其压力的周期性变化情况,然后在同样的工况下用实验测试的方法研究工质在换热器系统内的压力传递变化特性。最后比较理论计算值与实验测试值得出,施密特分析法可以反映出斯特林机换热器系统内工质压力的真实变化情况,且叠网式的回热器结构是造成换热器系统内压力损失的主要因素之一。
Stirling engines are gaining more and more attention due to their external heating characteristics suitable for use in distributed energy systems. Stirling machine is running, the internal pressure of the working fluid changes in the transmission characteristics of the decision of the size of the output mechanical power. In this paper, Schmitt’s method is used to calculate the cyclical variation of pressure on a self-developed Stirling machine under the pre-charge helium pressure of 2 MPa, and then use the experimental test under the same conditions Method to study the variation of the pressure transfer in the heat exchanger system. Finally, the theoretical and experimental values are compared to find out that Schmitt’s analysis can reflect the real change of working medium pressure in the Stirling heat exchanger system, and the stacked regenerator structure is the result of heat exchanger One of the main factors of pressure loss in the system.