Next Article in Journal
The Effect of Using Social Media in the Modern Marketing Communication on the Shaping an External Employer’s Image
Previous Article in Journal
An Approximate Transfer Function Model for a Double-Pipe Counter-Flow Heat Exchanger
Previous Article in Special Issue
Research and Development of the Oxy-Fuel Combustion Power Cycles with CO2 Recirculation
Article

Performance Optimizations with Single-, Bi-, Tri-, and Quadru-Objective for Irreversible Atkinson Cycle with Nonlinear Variation of Working Fluid’s Specific Heat

by 1,2, 1,2, 1,2,* and 1,2
1
Institute of Thermal Science and Power Engineering, Wuhan Institute of Technology, Wuhan 430205, China
2
School of Mechanical & Electrical Engineering, Wuhan Institute of Technology, Wuhan 430205, China
*
Author to whom correspondence should be addressed.
Academic Editor: Mario Marchesoni
Energies 2021, 14(14), 4175; https://doi.org/10.3390/en14144175
Received: 16 June 2021 / Revised: 1 July 2021 / Accepted: 7 July 2021 / Published: 10 July 2021
(This article belongs to the Special Issue Energy Complex System Simulation, Design, and Optimisation)
Considering nonlinear variation of working fluid’s specific heat with its temperature, finite-time thermodynamic theory is applied to analyze and optimize the characteristics of an irreversible Atkinson cycle. Through numerical calculations, performance relationships between cycle dimensionless power density versus compression ratio and dimensionless power density versus thermal efficiency are obtained, respectively. When the design parameters take certain specific values, the performance differences of reversible, endoreversible and irreversible Atkinson cycles are compared. The maximum specific volume ratio, maximum pressure ratio, and thermal efficiency under the conditions of the maximum power output and maximum power density are compared. Based on NSGA-II, the single-, bi-, tri-, and quadru-objective optimizations are performed when the compression ratio is used as the optimization variable, and the cycle dimensionless power output, thermal efficiency, dimensionless ecological function, and dimensionless power density are used as the optimization objectives. The deviation indexes are obtained based on LINMAP, TOPSIS, and Shannon entropy solutions under different combinations of optimization objectives. By comparing the deviation indexes of bi-, tri- and quadru-objective optimization and the deviation indexes of single-objective optimizations based on maximum power output, maximum thermal efficiency, maximum ecological function and maximum power density, it is found that the deviation indexes of multi-objective optimization are smaller, and the solution of multi-objective optimization is desirable. The comparison results show that when the LINMAP solution is optimized with the dimensionless power output, thermal efficiency, and dimensionless power density as the objective functions, the deviation index is 0.1247, and this optimization objective combination is the most ideal. View Full-Text
Keywords: irreversible Atkinson cycle; nonlinear variable specific heat; NSGA-II; multi-objective optimization; finite time thermodynamics irreversible Atkinson cycle; nonlinear variable specific heat; NSGA-II; multi-objective optimization; finite time thermodynamics
Show Figures

Figure 1

MDPI and ACS Style

Shi, S.; Ge, Y.; Chen, L.; Feng, H. Performance Optimizations with Single-, Bi-, Tri-, and Quadru-Objective for Irreversible Atkinson Cycle with Nonlinear Variation of Working Fluid’s Specific Heat. Energies 2021, 14, 4175. https://doi.org/10.3390/en14144175

AMA Style

Shi S, Ge Y, Chen L, Feng H. Performance Optimizations with Single-, Bi-, Tri-, and Quadru-Objective for Irreversible Atkinson Cycle with Nonlinear Variation of Working Fluid’s Specific Heat. Energies. 2021; 14(14):4175. https://doi.org/10.3390/en14144175

Chicago/Turabian Style

Shi, Shuangshuang, Yanlin Ge, Lingen Chen, and Huijun Feng. 2021. "Performance Optimizations with Single-, Bi-, Tri-, and Quadru-Objective for Irreversible Atkinson Cycle with Nonlinear Variation of Working Fluid’s Specific Heat" Energies 14, no. 14: 4175. https://doi.org/10.3390/en14144175

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop