Exergy-Based Ecological Optimization of an Irreversible Quantum Carnot Heat Pump with Spin-1/2 Systems

• Published in: Journal of non-equilibrium thermodynamics Vol. 46; no. 1; pp. 61 - 76
• Main Authors: Liu, Xiaowei, Chen, Lingen, Ge, Yanlin, Feng, Huijun, Wu, Feng, Lorenzini, Giulio
• Format: Journal Article
• Language: English
• Published: Berlin De Gruyter 01.01.2021; Walter de Gruyter GmbH
• Subjects: Ecological effects; Exergy; exergy-based ecological optimization; finite time thermodynamics; Heat pumps; Heating load; Optimization; quantum heat pump cycle; spin-1/2 systems
• ISSN: 0340-0204; 1437-4358
• DOI: 10.1515/jnet-2020-0028

Based on an irreversible quantum Carnot heat pump model in which spin-1/2 systems are used as working substance, an exergy-based ecological function and some other important parameters of the model heat pump are derived. Numerical examples are provided to investigate its ecological performance characteristics. The influences of various irreversibility factors on the ecological performance are discussed. Performance comparison and discussion among maximum points of ecological function, heating load, and so on, are conducted. At last, three special cases are discussed.