Time-Transient Optimization of Electricity and Fresh Water Cogeneration Cycle Using Gas Fuel and Solar Energy

Khosrow Hemmatpour, Ramin Ghasemiasl (), Mehrdad Malekzadeh Dirin and Mohammad Amin Javadi
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Khosrow Hemmatpour: Department of Mechanical Engineering, West Tehran Brach, Islamic Azad University, Tehran 1468763785, Iran
Ramin Ghasemiasl: Department of Mechanical Engineering, West Tehran Brach, Islamic Azad University, Tehran 1468763785, Iran
Mehrdad Malekzadeh Dirin: Department of Mechanical Engineering, West Tehran Brach, Islamic Azad University, Tehran 1468763785, Iran
Mohammad Amin Javadi: Department of Mechanical Engineering, West Tehran Brach, Islamic Azad University, Tehran 1468763785, Iran

Mathematics, 2023, vol. 11, issue 3, 1-21

Abstract: In this study, a cogeneration cycle in a time-transient state is investigated and optimized. A quasi-equilibrium state is assumed because of the small time increments. Air temperature and solar power are calculated hourly. The cycle is considered in terms of energy, exergy, and economic and environmental analyses. Increasing the net present value (the difference between the present value of the cash inflows and outflows over a period of time) and reducing exergy destruction are selected as two optimization objective functions. The net present value is calculated for the period of 20 years of operation according to the operation parameters. The optimization variables are selected in such a way that one important variable is selected from each system. To optimize the cycle, the particle swarm optimization method is used. The number of particles used in this method is calculated using the trial-and-error method. This cycle is optimized using 13 particles and 42 iterations. After optimization, the energy efficiency increased by 0.5%, the exergy efficiency increased by 0.25%, and the exergy destruction decreased by 1% compared to the cycle with existing parameters.

Keywords: optimization; cogeneration of water and electricity; time-transient analysis; sensitivity analysis; solar power (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2023
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