Key Findings & Data:Basic thermodynamic parameters including power output and energy efficiency are considered, besides ecological function.
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Conclusion & Impact:The results show that ecological function have maximum (optimum) point for a and there is no optimum point for any parameter for x and y.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Quantum Heat Engine · Irreversibility · Ecological Function
Abstract
This paper considers irreversible two-state quantum Carnot heat engine. Basic thermodynamic parameters including power output and energy efficiency are considered, besides ecological function. Ecological function gives someone information about balance between power output and exergy destruction. The results show that ecological function have maximum (optimum) point for a and there is no optimum point for any parameter for x and y. All parameters are compared with each other and the most convenient operation conditions are recommended.
Bender CM., Brody D.C., Meister B.K. Quantum mechanical Carnot engine. J. Phys. A: Math. Gen. 2000; 33: 4427–4436. doi:10.1088/0305-4470/33/24/302
Yin Y., Chen L., Wu F. Optimal power and efficiency of quantum Stirling heat engines. Eur. Phys. J. Plus 2017; 132: 45. doi: 10.1140/epjp/i2017-11325-0
Latifah E., Purwanto A. Multiple-State Quantum Carnot Engine. Journal of Modern Physics 2011;2: 1366-1372. doi:10.4236/jmp.2011.211169
Liu X., Chen L., Wu F., Sun F. Fundamental optimal relation of an irreversible quantum Carnot heat pump with spin-1/2 systems. Mathematical and Computer Modeling 2011;54: 190-202. doi: doi.org/10.1016/j.mcm.2011.02.001
Liu X., Chen L., Wu F., Sun F., Cooling load and energy efficiency optimization of an irreversible Carnot refrigerator with spin-1/2 systems. International Journal of Energy and Environment 2011; 2: 797-812
Feldmann, T., Kosloff, R. Performance of Discrete Heat Engines and Heat Pumps in Finite Time. Phys.Rev. E 2000; 61: 4774-4790. doi: 10.1103/PhysRevE.61.4774
Liu X., Chen L., Wu F., Sun F. Ecological optimization of an irreversible quantum Carnot heat engine with spin-1/2 systems. Physica Scripta 2010; 81:025003. doi.org/10.1088/0031-8949/81/02/025003
Geva, E., Kosloff, R. A quantum-mechanical heat engine operating in finite time. a model consisting of spin-1/2 systems as working fluid. J. Chem. Phys. 1992;96: 3054–3067. doi: 10.1063/1.461951
Wu, F., Chen, L.G., Sun, F.R. and Wu, C. Performance of an irreversible quantum Carnot engine with spin-1/2. J. Chem. Phys. 2006; 124: 214702. doi:10.1063/1.2200693
Beretta G.P. Quantum thermodynamic Carnot and Otto-like cycles for a two-level system. EPL 2012; 99: 20005. doi: 10.1209/0295-5075/99/20005
Henrich M.J., Rempp F., Mahler G., Quantum thermodynamic Otto machines: A spin-system approach. Eur. Phys. J. Special Topics 2007; 151: 157–165
Xiao-Li Huang, Xin-Ya Niu, Xiao-Ming Xiu, Xue-Xi Yi,, Quantum Stirling heat engine and refrigerator with single and coupled spin systems, Eur. Phys. J. D (2014) 68: 32. doi:10.1209/0295-5075/99/20005
Azimi M, Chotorlishvili L, Mishra S K, Vekua T, Hübner W, Berakdar J. Quantum Otto heat engine based on a multiferroic chain working substance. New Journal of Physics 2014; 16: 063018. doi: 10.1088/1367-2630/16/6/063018