Analysis and optimization with ecological objective function of irreversible single resonance energy selective electron heat engines. (15th September 2016)

• Record Type: Journal Article
• Authors: Zhou, Junle; Chen, Lingen; Ding, Zemin; Sun, Fengrui
• Is Part Of: Energy. Volume 111(2016)
• Page Start: 306
• Page End: 312
• Publication Date: 2016-09-15
• Subjects: Energy selective electron heat engine -- Ecological objective function -- Performance comparison -- Finite time thermodynamics; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Energy consumption -- Periodicals; 333.7905
• DOI: 10.1016/j.energy.2016.05.111
• Languages: English
• ISSNs: 0360-5442

Abstract

Abstract: Ecological performance of a single resonance ESE heat engine with heat leakage is conducted by applying finite time thermodynamics. By introducing Nielsen function and numerical calculations, expressions about power output, efficiency, entropy generation rate and ecological objective function are derived; relationships between ecological objective function and power output, between ecological objective function and efficiency as well as between power output and efficiency are demonstrated; influences of system parameters of heat leakage, boundary energy and resonance width on the optimal performances are investigated in detail; a specific range of boundary energy is given as a compromise to make ESE heat engine system work at optimal operation regions. Comparing performance characteristics with different optimization objective functions, the significance of selecting ecological objective function as the design objective is clarified specifically: when changing the design objective from maximum power output into maximum ecological objective function, the improvement of efficiency is 4.56%, while the power output drop is only 2.68%; when changing the design objective from maximum efficiency to maximum ecological objective function, the improvement of power output is 229.13%, and the efficiency drop is only 13.53%. Highlights: An irreversible single resonance energy selective electron heat engine is studied. Heat leakage between two reservoirs is considered. Power output, efficiency and ecological objective function are derived. Optimal performance comparison for three objective functions is carried out.