Abstract
A regenerator is one of the parts which influence performance of the Stirling cycle machine. In generally a metal matrix is used as the material of the regenerator, but a plastic matrix that is represented by Nylon has never been used so far. As for the advantage of the plastic matrix being light, the plastic matrix itself has a small diamter of the matrix wire and it has the possibility to become cheap. The positions of the displacer and the piston for the refrigerator and gas pressure were measured, and the COP of the Stirling refrigerator with the hybrid-regenerator piled up the metal matrix and the plastic matrix was evaluated. The best performance of the Stirling refrigerator is revealed at the volume ratio of the Nylon matrix to the copper matrix 2.3. The COP of the hybrid-regenerator is 80 percent of the COP with the metal matrix regenerator. The COP of the Stirling refrigerator with the hybrid-regenerator was also numericals simulated.