Cooling Cycle Optimization for a Vuilleumier Refrigerator

Entropy

Karl Heinz Hoffmann¹  Raphael Paul¹  Abdellah Khodja¹  Andreas Fischer¹ 

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

关键词: piston motion optimization;    endoreversible thermodynamics;    Stirling engine;    irreversibility;    power;    efficiency;   

DOI  :  10.3390/e23121562

来源: DOAJ

【 摘 要 】

Vuilleumier refrigerators are a special type of heat-driven cooling machines. Essentially, they operate by using heat from a hot bath to pump heat from a cold bath to an environment at intermediate temperatures. In addition, some external energy in the form of electricity can be used as an auxiliary driving mechanism. Such refrigerators are, for example, advantageous in situations where waste heat is available and cooling power is needed. Here, the question of how the performance of Vuilleumier refrigerators can be improved is addressed with a particular focus on the piston motion and thus the thermodynamic cycle of the refrigerator. In order to obtain a quantitative estimate of the possible cooling power gain, a special class of piston movements (the AS motion class explained below) is used, which was already used successfully in the context of Stirling engines. We find improvements of the cooling power of more than 15%.

【 授权许可】

Unknown