Optimized Cooling Power of a Vuilleumier Refrigerator with Limited Regeneration

Energies

Karl Heinz Hoffmann¹  Abdellah Khodja¹  Raphael Paul¹  Andreas Fischer¹ 

[1] Institut für Physik, Technische Universität Chemnitz, 09107 Chemnitz, Germany;

关键词: piston motion optimization;    endoreversible thermodynamics;    vuilleumier refrigerator;    cooling power optimization;    heat-only operation;   

DOI  :  10.3390/en14248376

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown