Forthcoming Articles

International Journal of Exergy

International Journal of Exergy (IJEX)

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International Journal of Exergy (7 papers in press)

Regular Issues

  • Energy and Exergy Analysis of a Solar Air Collector with Evacuated Tubes under Different Flow and Reflector Configurations   Order a copy of this article
    by Nitin Panwar, Rajesh Attri 
    Abstract: This study investigates the energy and exergy performance of a solar air collector (SAC) integrated with evacuated tubes under varying air flow rates and reflector configurations. Experiments conducted from 08:0018:00 h showed outlet air temperatures up to 105.2. This study investigates the energy and exergy performance of a solar air collector (SAC) integrated with evacuated tubes under varying air flow rates and reflector configurations. Experiments conducted from 08:0018:00 h showed outlet air temperatures up to 105.2C. Energy efficiency ranged between 3571%, while exergy efficiency varied from 2.165%. Exergy input, output and loss averaged 104.6, 3.0 and 101.6 kJ/kg, respectively. Efficiency decreased near midday but improved later. Overall, the reflector-assisted high-flow system demonstrated superior thermal and exergy performance, highlighting its potential for sustainable and efficient solar air heating applications.
    Keywords: Evacuated tube; Solar air collector; Thermal Performance; Exergy; flow rates.
    DOI: 10.1504/IJEX.2026.10075494
     
  • Exergy, Energy, and Exergoeconomic Assessment of a Solar Based Novel Power Generation System using Helium Brayton Cycle   Order a copy of this article
    by Achintya Sharma, Anoop Shukla, Onkar Singh, Meeta Sharma 
    Abstract: This study presents a novel solar power tower (SPT)-based power plant integrating a helium Brayton cycle (HBC) as the topping cycle and a recuperative organic Rankine cycle as waste heat recovery cycle. Energy, exergy, and exergoeconomic analyses were performed numerically. Results demonstrate that the proposed system achieved improvements of 19.86% in energy efficiency and 19.85% in exergy efficiency, however, at a 9.41% increase in overall plant cost compared to the conventional SPT-HBC configuration. Therefore, the proposed system achieved energy and exergy efficiencies of 34.45% and 36.89%, respectively, and a levelised cost of electricity of 43.23 $/MWh.
    Keywords: solar power tower; recuperative ORC; working fluid selection; helium Brayton cycle; exergoeconomic analysis.
    DOI: 10.1504/IJEX.2026.10075560
     
  • Energy and Exergy Analyses of a Novel Trans-critical CO2 Booster Refrigeration System with Internal Subcooling for Supermarket   Order a copy of this article
    by Xuyang Cui, Yunzhe Zhang, Junlan Yang 
    Abstract: In order to optimize supermarket refrigeration systems, a novel transcritical CO2 system was developed. Simulation results indicate that under high-temperature conditions, the optimal discharge pressure ranges from 9 to 11 MPa, corresponding to the best COP value of 2-2.4, while receiver pressures above 5 MPa reduce COP by 3.7-4.7%. Advanced exergy analysis reveals the high-pressure compressor has the highest avoidable exergy destruction (12.05 kW at 30C), followed by the gas cooler and medium-temperature evaporator, indicating significant optimisation potential.
    Keywords: transcritical CO2 booster refrigeration system; internal subcooling; COP; advanced exergy analysis.
    DOI: 10.1504/IJEX.2026.10076204
     
  • Exergy-Based Analysis of Polymer Recycling in the Automotive Sector   Order a copy of this article
    by Cemil Koyunoğlu, Tamer Çınar 
    Abstract: In this study, the exergy performance of a biomass drying system was analysed using MATLAB-based simulations under varying operating conditions. Maximum exergy efficiency was 42.3%, while maximum exergy destruction occurred at elevated inlet air temperatures. These results emphasise the reliance of system performance on operating parameters, and the relevance of critical points for improvement regarding energy efficiency. The results presented herein are anticipated to stimulate the development of more effective and sustained biomass drying technologies.
    Keywords: Polymer Recycling; automotive sector; exergy approach; energy use; sustainability; environmental impact; recycling level; polymer type; resource conservation; sustainable practices.
    DOI: 10.1504/IJEX.2026.10076209
     
  • Exergetic and Exergoeconomic Analyses of a Diesel Engine Fuelled with Diesel Biodiesel Blends including Green Synthesised HC-Glu and HC-Cel Nanoparticles   Order a copy of this article
    by Cuneyt Uysal, Umit Agbulut, Hamza Simsir, Fikret Polat, Suat Saridemir 
    Abstract: In this study, a diesel engine fuelled by diesel-biodiesel blends including HC-Glu and HC-Cel nanoparticles is investigated in the perspectives of exergy and exergoeconomics. B20HC-Glu100, B20HC-Glu200, B20HC-Cel100 and B20HC-Cel200 nanofuels were prepared with HC-Glu and HC-Cel nanoparticles addition of 100 ppm and 200 ppm to B20, respectively. The highest exergy efficiency of test engine was calculated to be 25.23% for B20HC-Cel200. Whereas, the cheapest specific exergy cost of crankshaft work was determined to be 142.67 US$/GJ for D100. Nanofuels had better exergetic and exergoeconomic performances compared to their base fuels. However, D100 showed the best exergoeconomic performance compared to nanofuels.
    Keywords: Hydrochar; hydrothermal carbonization; nanofuel; green nanoparticle.
    DOI: 10.1504/IJEX.2026.10076625
     
  • Electro-Osmotic Peristaltic Transport of Casson Fluid with Thermal Radiation and Entropy Generation under the Influence of Ciliary Motion   Order a copy of this article
    by Mahadev Channakote, Shekar Marudappa, Jyoti Somaraju 
    Abstract: This work examines electro-osmotic peristaltic transport of Casson fluid in a two-dimensional channel under the influence of thermal radiation, entropy generation, and ciliary motion. The governing equations account for electrokinetic forces, non-Newtonian rheology, and cilia-induced wall motion, with thermal radiation modelled via the Rosseland approximation. Using long wavelength and low Reynolds number assumptions, analytical and numerical solutions are obtained for velocity, temperature, and entropy profiles. The effects of electro-osmotic strength, Casson parameter, thermal radiation, Brinkman number, and ciliary activity are analysed, showing enhanced transport and thermal regulation, with notable impacts on velocity distribution and entropy generation. This comprehensive study provides insights into optimizing microscale fluid transport in biomedical and engineering.
    Keywords: Electro-osmotic; Cilia wave; Peristaltic flow; Thermal radiation; Casson fluid; Entropy generation.
    DOI: 10.1504/IJEX.2026.10076648
     
  • Exergy and Energy Performance Analysis of Hybrid Photovoltaic Thermal (PVT) Systems for Sustainable Energy Transition   Order a copy of this article
    by Areeba Rehman, Naeem Abas, Muhammad Shoaib Saleem 
    Abstract: The rising global energy demand and reliance on fossil fuels intensify climate change, urging renewable integration. This study investigates a hybrid photovoltaic thermal (PV/T) system installed at University of Gujrat, modelled in TRNSYS under Lahore's semi-arid climate. The system simultaneously generated electricity and thermal energy, with peak electrical output and energy gain in September, and maximum collector efficiency of 43.23% in August. The annual average efficiency was 10.63%. Results confirm the technical viability of PV/T systems as a sustainable solution for combined heat and power generation in regions with high solar insolation.
    Keywords: Hybrid renewable energy; Photovoltaic thermal; Sustainability; TRNSYS simulation.
    DOI: 10.1504/IJEX.2026.10076688
     

 

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