Forthcoming and Online First Articles

International Journal of Exergy

International Journal of Exergy (IJEX)

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International Journal of Exergy (7 papers in press)

Regular Issues

  • Thermodynamic Assessment of A Desalination System Integrated with Combined Cycle Power Plant via Throttling Process by Using a Vapour Compressor   Order a copy of this article
    by Ahmad Zikri, Muhsin Kilic 
    Abstract: This study aims to conduct a thermodynamic analysis of desalination system integrated with combined cycle power plant (CCPP), with a focus on the throttling process method combined with a steam compressor, the influence of pinch point temperature difference (PPTD) on distilled water production (specific aquadest production/SAP) and specific energy consumption (SEC). Reducing condenser pressure from 10.89 to 8.43 kPa and PPTD of 10 can increase steam turbine power by 2.18% and allow the wastewater temperature to drop to 32.5
    Keywords: electricity; freshwater; pinch point temperature difference; PPTD; specific aquadest production; SAP; specific energy consumption; SEC.
    DOI: 10.1504/IJEX.2025.10066839
     
  • Energetic and Exergetic Analysis of Multi-Energy Hybrid System Including Geothermal, Green Hydrogen, and Cold Energy Storage   Order a copy of this article
    by Gamze Soyturk, Onder Kizilkan 
    Abstract: This research delves into a thorough examination of a multi-energy system, combining geothermal energy, hydrogen (H2) generation, and cold energy storage. The system aims to establish an eco-friendly energy infrastructure by integrating these sustainable sources and storage methods. The study evaluates the system’s energy performance, scrutinising energy inputs, outputs, losses, and conversions across various components and subsystems. Furthermore, it conducts an exergy analysis to assess the effectiveness of energy transformations within the system, pinpointing areas of irreversibility and exergy dissipation. The findings reveal that the overall energetic efficiency stands at 11.31%, while the exergetic efficiency reaches 31.69%.
    Keywords: geothermal energy; green hydrogen; cold energy storage; energy; exergy.
    DOI: 10.1504/IJEX.2025.10067147
     
  • An Exergetic Performance Improvement Potential of a Modified Ejector-Enhanced Auto-Cascade Refrigeration Cycle   Order a copy of this article
    by Ibrahim Karacayli, Lutfiye Altay, Arif Hepbasli 
    Abstract: This study examines both conventional and advanced exergy analyses of a modified ejector-enhanced auto-cascade refrigeration (MEACR) cycle. Conventional exergy analysis shows that the proposed model significantly improves exergy efficiency compared to similar ejector-enhanced auto-cascade refrigeration cycles in the literature. Advanced exergy analysis reveals that 63.47% of the total exergy destruction is avoidable. When the components of the MEACR cycle are investigated, 56.31% of the exergy destruction is attributed to the endogenous part. The low-temperature cycle (LTC) compressor has the highest avoidable endogenous exergy destruction rate of 12.64 kW with 38.5%.
    Keywords: refrigeration; auto-cascade refrigeration; ejector; exergy analysis; advanced exergy analysis.
    DOI: 10.1504/IJEX.2025.10067148
     
  • Exergy based Design and Analysis of Spiral Circular and Square Coils for EV Wireless Battery Charging Application   Order a copy of this article
    by Balaji Subramanian, Thangavelu Anuradha 
    Abstract: This paper investigates the impact of misalignment on mutual inductance (MI) in wireless power transfer systems using spiral circular and square coils. Finite element analysis (FEA) and experimental validation compare the performance of square and circular geometry coils. Results show that square coils maintain higher mutual inductance under various misalignments, making them more suitable for practical applications. Experimental results validate simulation data, demonstrating the superiority of square coils for robust WIPTS. Analytical and FEM simulations show minimal error for both circular and square coil mutual inductance and coupling coefficients at 200m air gap, with square coils exhibiting superior exergetic efficiency.
    Keywords: electric vehicle; coupling co-efficient; wireless power transfer; mutual inductance; spiral circular; square coil.
    DOI: 10.1504/IJEX.2025.10067438
     
  • Exergoeconomic Analysis of the Utilisation of Microalgae Derived Biostimulants for Sustainable Agriculture   Order a copy of this article
    by Nicholas Melenek, Murilo Rampi, Jose Viriato Coelho Vargas, Gabriela Conor, Anne Oliveira, Andre B. Mariano, Juan Ordonez, Vanessa Kava 
    Abstract: This study addresses a biorefinery system that enables the production of microalgae derived biostimulants, which includes a municipal solid waste (MSW) incinerator, heat recovery steam generator (HRSG), an emissions fixation column, a photobioreactor, a flocculator, a centrifuge, and a dryer. The output is dry biomass to be utilised as fertiliser. The system technical and economic viability is investigated via an exergoeconomic analysis, which evaluates the systems performance accounting for energy consumption, exergy losses, and economic features related to each stage. The exergoeconomic evaluation established an exergetic cost of 1.022
    Keywords: agricultural practices; plant growth promoters; PGP; mathematical model; sustainability; cogeneration; exergy analysis; municipal solid waste.
    DOI: 10.1504/IJEX.2025.10067746
     
  • Energy and Exergy Efficiency Evaluations of Hydrogen-Based Fluidized Bed Ironmaking Reactor   Order a copy of this article
    by Wenlei Zhou, Fuyong Su, Cunwang Li, Kunpeng Zhang, Shengnan Wei, Sizong Zhang 
    Abstract: This paper analyses the energy and exergy efficiency of hydrogen-based fluidised bed (FB). The results indicate that the energy and exergy efficiencies of the single-stage FB are 35.16% and 27.45%, respectively, while those of the two-stage FB are 33.46% and 27.31%. Increasing the ratio of H2 injection can cause a substantial decrease in both energy and exergy efficiencies. Furthermore, exergy efficiency in both types of FB gradually rises with reaction temperature, while energy efficiency initially increases then declines, reaching a maximum at 1,023 K. Increasing N2 content leads to a gradual decrease in energy efficiency, with minimal impact on exergy efficiency.
    Keywords: hydrogen-based fluidised bed; energy efficiency; exergy efficiency; ratio of H2 injection; reaction temperature; N2 content.
    DOI: 10.1504/IJEX.2025.10067929
     
  • Multi-Objective Optimisation of a new Multi-Generation System Integrating Waste Heat Recovery, and Geothermal Resources to produce Power, Hydrogen, Heating, and Cooling   Order a copy of this article
    by Mohammad Ali Sabbaghi, Mohammad Sefid 
    Abstract: This study investigates a new multi-generation system through the integration of geothermal energy, waste heat, organic Rankine cycle (ORC), proton exchange membrane electrolyser (PEME) and water-ammonia absorption chiller cycle. The impact of various effective parameters on system performance is evaluated and the system is optimised based on three viewpoints. The obtained results show that the turbine production power is 101.2 kW, the hydrogen production rate is 1.467 kg/h, and the amount of cooling generated in the evaporator, 65.48 kW, is determined. The heat released in the de-superheater amounts to 81.79 kW, which is utilised to operate the absorption chiller.
    Keywords: multi-generation system; absorption chiller cycle; geothermal; heat recovery; optimisation.
    DOI: 10.1504/IJEX.2025.10067934
     

 

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