Optimized Cooling Power of a Vuilleumier Refrigerator with Limited Regeneration

Abdellah Khodja, Raphael Paul, Andreas Fischer and Karl Heinz Hoffmann
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Abdellah Khodja: Institut für Physik, Technische Universität Chemnitz, 09107 Chemnitz, Germany
Raphael Paul: Institut für Physik, Technische Universität Chemnitz, 09107 Chemnitz, Germany
Andreas Fischer: Institut für Physik, Technische Universität Chemnitz, 09107 Chemnitz, Germany
Karl Heinz Hoffmann: Institut für Physik, Technische Universität Chemnitz, 09107 Chemnitz, Germany

Energies, 2021, vol. 14, issue 24, 1-21

Abstract: Vuilleumier refrigerators provide cooling power by utilizing a heat source at temperatures above the ambient. This is particularly helpful in situations where waste heat is available and other power sources are limited. Vuilleumier refrigerators come in different technical configurations; here we analyze the thermodynamic performance of a configuration utilizing two displacer pistons with integrated regenerators. More specifically, we optimize the cooling power by optimizing the piston movement for a range of operation speeds. The optimization is based on the AS motion class for cyclic dynamics and uses an endoreversible model for the refrigerator. Our focus is on the influence of the regeneration extent present, and we find performance gains of about 17% for high regeneration extent and of about 28% for lower regeneration extent.

Keywords: piston motion optimization; endoreversible thermodynamics; vuilleumier refrigerator; cooling power optimization; heat-only operation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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