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Proceedings of the 27th National and 5th International ISHMT-ASTFE Heat and Mass Transfer Conference December 14-17, 2023, IIT Patna, Patna-801106, Bihar, India
December, 14-17, 2023, Bihar, India

High-Efficiency Hybrid Regenerator for Cryogenic Applications Using Additive Manufacturing

Get access (open in a dialog) DOI: 10.1615/IHMTC-2023.1700
pages 1045-1048


The regenerator is a crucial component of the cryogenic system, which directly interacts with cold and warm fluids during the process. The regenerative process improves the efficiency of the cryogenic system by reducing the work required to achieve low temperatures. An attempt to build the SS316L-based regenerator using an additive manufacturing technique reached a cryogenic temperature of 99K. Unfortunately, it could not be beneficial for liquefying nitrogen, which requires a temperature of 80K. A hybrid regenerator using excellent granules of Stainless Steel (SS) and lead is a promising approach for reaching temperatures below 20 K. The SS granules provide high thermal conductivity and low heat capacity, while the lead granules provide high specific heat and thermal inertia. This combination of properties allows the regenerator to absorb and release large amounts of heat with minimal temperature change, essential for achieving low temperatures. The performance of the proposed regenerator was observed from the simulation result that the minimum temperature obtained is 43.62K at an inlet temp of 300K and Temperature variation along the length of the regenerator.