Influence of External Heat Interaction of Working Fluid on the Oscillating Heat Transfer Behavior of Cryogenic Regenerator

In this paper, an analytical and numerical investigation has been conducted to illustrate the influence of external heat interaction (i.e. heat addition/heat removal) of the working gas with surrounding on the effectiveness of the regenerator. Governing equations for temperature distribution have been derived by utilizing the principle of energy balance to describe the regenerator heat flow phenomena subjected to external heat interaction and are converted into a dimensionless form using reasonable dimensionless parameters. The dimensionless equations are solved to illustrate the effect of external heat interaction of incoming gas on its effectiveness. It is noticed that external heat addition and removal to the working gas reduces and enhances the effectiveness of the regenerator respectively.