Fundamental research on a reverse Stirling cycle refrigerator using atmospheric pressure nitrogen refrigerant

-Optimization evaluation of the regenerator based on temperature drop and pressure loss-

Abstract

A Stirling refrigerator has a structure in which a high-temperature compression section and a low-temperature expansion section are arranged via a regenerator, and generally uses a single-phase gas as the working fluid. The regenerator contained in Stirling refrigerators acts as a heat storage material that exchanges heat as the working fluid flows through it, and its specifications determine the performance of this type of refrigerator. This study presents the results of an experimental evaluation of cooling performance using a regenerator made of thin stainless steel wire, when the wire diameter, bulk density, and refrigerator operating speed are changed.