Systematic analysis and multi-objective optimization of an integrated power and freshwater production cycle

Bahari, Mehran; Entezari, Ashkan; Esmaeilion, Farbod; Ahmadi, Abolfazl

doi:10.1016/j.ijhydene.2022.04.066

Cited by 11 publications

(5 citation statements)

References 71 publications

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“…87 This analysis is based on fundamental thermodynamic principles, namely energy conservation and mass conservation. 88,89 Generally assuming a steady-flow, steady-state process, according to Equation (1), mass and energy balance are applied to calculate the useful energy and efficiencies. The mass balance can be defined in the rating form as follow 90 :…”

Section: Energy Analysismentioning

confidence: 99%

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Critical review of multigeneration system powered by geothermal energy resource from the energy, exergy, and economic point of views

Azizi

Esmaeilion

Moosavian

et al. 2022

Energy Science & Engineering

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Concerns about greenhouse gas emissions from fossil fuels have made the use of renewable sources the world's most important energy challenge. Among renewable energies, geothermal energy has a special place due to its sustainable resources and shallow environmental impacts. These energy sources are classified as low-grade thermal energy sources, so they cannot independently provide a high amount of thermal energy. Therefore, extensive studies have been conducted on practical methods of using geothermal energy for multigeneration productions. Studies on geothermal energy-based systems to supply energy to various systems such as chillers, electrolyzers, turbines, and desalination units are reviewed in this study. As the methods, scenarios, and practical possibilities of multigenerational system (MGS) are limited, in this study, while expressing the limitations and problems of these systems, the most critical issues raised in this issue are examined and analyzed, and compatibility, products, Levelized cost of energy, energy and exergy efficiencies, and technical issues are summarized. Also, due to the limitations of geothermal energy sources in recent studies, their combination with other renewable energy sources has been evaluated. Therefore, the classification of studies conducted to combine renewable energy sources with the geothermal system to achieve multigeneration productions is thrown in the last part of this study. The results of the studies show that the combination of geothermal energy with other renewable energy sources is used in 90% of cases to provide heat and cold load and in 10% of cases to generate electrical power. These systems also improve energy and exergy efficiency and economic viability by increasing stability.

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Section: Energy Analysismentioning

confidence: 99%

“…It can give information on the quantity of energy input and output of a system 87 . This analysis is based on fundamental thermodynamic principles, namely energy conservation and mass conservation 88,89 …”

Section: Mathematical Modelingmentioning

confidence: 99%

Critical review of multigeneration system powered by geothermal energy resource from the energy, exergy, and economic point of views

Azizi

Esmaeilion

Moosavian

et al. 2022

Energy Science & Engineering

Self Cite

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“…In a general and simplified manner, mass and energy rate balances can be written as 40,43,44 :

\sum _{\mathrm{in}}\dot{m}=\sum _{\mathrm{out}}\dot{m},

\dot{Q}-\dot{W}=\sum _{P}\dot{m}({h}_{f}+(h-{h}_{0}))-\sum _{R}\dot{m}({h}_{f}+(h-{h}_{0})).

Here, Q̇ and Ẇ denote the heat transfer rate and work rate respectively, ṁ is the mass flow rate, and h is the specific enthalpy. Subscripts P , f , R , and 0 denote products, formation, reactants, and dead state conditions, respectively.…”

Section: Mathematical Modelingmentioning

confidence: 99%

Assessment of a novel geothermal powered polygeneration system with zero liquid discharge

Afshari

Ehyaei

Esmaeilion

et al. 2022

Energy Science & Engineering

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Energy, exergy, economic, exergoenvironmental, and environmental analyses are reported for a novel polygeneration system consisting of a geothermal cycle, a CO2 cycle, a reverse osmosis unit, an electrodialysis unit, a lithium bromide absorption chiller, and a liquefaction unit for natural gas. The proposed system is able to produce electricity, cooling, desalinated water, sodium hydroxide, and hydrogen. To study the environmental aspects of the proposed facility, the associated social cost of air pollution is determined. This parameter implies a comparison between nonrenewable and renewable energy systems to produce the same amount of electricity, while the amount of air pollutants generated and their associated costs are considered. Three scenarios are introduced. The results indicate that the system produces 631 GWh/year electrical energy, 465 GWh/year cooling, 6.22 ‎ton/year NaClO, 1.57 × 108 m3/year hydrogen, and 386,000 m3/year potable water for a geothermal working fluid supplied with mass flow rate of 100 kg/s at a temperature of 150°C and a pressure of 457.5 kPa. Also, the calculated values of the energy and exergy efficiencies are 58.3% and 94.2%, respectively. The payback period is determined to be 5.3 years. The net present value ‎is found to be ‎113.6 million US$ which is lower than that for all the nonrenewable‐based scenarios considered.

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“…Utilizing genetic algorithms for multi-objective optimization is an effective approach to find the best solutions when dealing with objectives that are in conflict [15]. Abdullah et al [16] introduced a poly-generation plant for CCHP and freshwater generation and used multiobjective optimization to improve its energy and exergy efficiency from 73.9% to 79% and 71.35% to 73.9%, respectively, and reduce its total cost from 10.62 USD/h to 9.26 USD/h.…”

Section: Introductionmentioning

confidence: 99%

Thermo-Economic Analysis and Multi-Objective Optimization of a Poly-Generation System Based on Solid Oxide Fuel Cell/Gas Turbine/Multi-Effect Distillation and Absorption Chiller Using Biogas as Fuel

Liu,

Yu,

et al. 2023

Energies

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A poly-generation system for cooling, heating, power, and fresh water is proposed, based on SOFC/GT/MED and an absorption chiller, with biogas as fuel. The performance of the system under the designed condition is analyzed using energy, exergy, and economic methods. An efficiency of 69.02% for comprehensive energy utilization and 35.56% for exergy are demonstrated by simulation results under the designed condition. A freshwater production of 469.93 kg/h is achieved, and a cost rate of 22.51 USD/h is incurred by the system. The effects of various parameters on the system characteristics are examined. Multi-objective optimization methods are employed to determine the final optimum operating condition that yields the best results in two schemes with different objectives. In comparison to the initial design, the optimization of the first scheme results in a 4.58% increase in the comprehensive energy utilization rate and a 2.02% increase in the exergy efficiency. However, the cost rate of the entire system increases by 0.63 USD/h. On the other hand, the optimization of the second scheme leads to a 19.51 kW decrease in the total energy output, a 276.38 kg/h increase in the freshwater production rate, and a 0.42 USD/h decrease in the cost rate of the entire system.

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Systematic analysis and multi-objective optimization of an integrated power and freshwater production cycle

Cited by 11 publications

References 71 publications

Critical review of multigeneration system powered by geothermal energy resource from the energy, exergy, and economic point of views

Critical review of multigeneration system powered by geothermal energy resource from the energy, exergy, and economic point of views

Assessment of a novel geothermal powered polygeneration system with zero liquid discharge

Thermo-Economic Analysis and Multi-Objective Optimization of a Poly-Generation System Based on Solid Oxide Fuel Cell/Gas Turbine/Multi-Effect Distillation and Absorption Chiller Using Biogas as Fuel

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