Abstract
Regenerator losses of two 3-kW Stirling engines are analyzed in detail to optimize the regenerators. A fifty-percent indicated efficiency and a lower regenerator loss were obtained by adopting a unique cylinder arrangement and a well-designed heat exchanger system. To clarify the regenerator performance, the losses are adequately evaluated by using reliable experimental data and are analyzed by a mathematical model. Based on these analysis results and optimizing processes during the engine improvements, a design method for regenerators of practical engine was established and was introduced in this report.
