“Investigation Variable Parameters in Cryocooler Design: CFD simulation of Coaxial Pulse tube Cryocooler”

Abstract

The most practical choice for compact and convenient pulse tube refrigeration in real-world scenarios is the inline type. To anticipate the lowest achievable temperature in the cold heat exchanger under a refrigerating load-free condition, a Computational Fluid Dynamics(CFD) analysis of the Coaxial pulse tube Cryocoolers(CPTC) is conducted. Helium serves as the working fluid for this analysis. This study meticulously examines the required phase lag between mass flow rate and temperature, while also observing temperature and density variations. The cryocoolers can achieved lowest temperature nearly 111 K with 0-watt load and 155 K with 1watt refrigerating load at cold heat exchanger with maximum enthalpy flow rate achieved when the phase angle is around 30^o. if we consider axial conduction losses than we can find more accurate prediction about cooling effects.