Energy Conversion and Management最新文献

{"title":"Performance assessment of a solar hybrid potable atmospheric water generator using vapour adsorption-thermo electric cooling system","authors":"V. Baiju ,&nbsp;A. Asif Sha ,&nbsp;Ai Bao Chai ,&nbsp;Nibal Fadel Farman Alhialy ,&nbsp;Aneesh G. Nath ,&nbsp;A. Sudheer","doi":"10.1016/j.enconman.2025.119665","DOIUrl":"10.1016/j.enconman.2025.119665","url":null,"abstract":"<div><div>Water scarcity remains a critical global challenge, threatening sustainable development and demanding innovative solutions. While desalination is widely regarded as a popular method to address this issue, its energy-intensive nature, production of non-potable byproducts, high cost, and bulky infrastructure make it less suitable for widespread adoption. An alternative approach is the atmospheric water generation system, for which the most commonly used method is the vapour compression systems. However, these systems have their drawbacks, including high energy consumption, reduced effectiveness in low-humidity environments, environmental concerns from refrigerants, and significant maintenance costs. To overcome these limitations, the vapour adsorption system emerges as a promising alternative. It is energy-efficient, environmentally friendly with non-toxic adsorbents, capable of operating in low-humidity conditions, and compatible with renewable energy sources like solar power. However, the system’s relatively low water production rate underscores the need for a hybrid approach to improve both efficiency and output. This consideration has led to the integration of adsorption cooling systems with thermoelectric cooling for atmospheric water generation. Therefore, this study aims to introduce and evaluate a hybrid vapour adsorption–thermoelectric cooling system designed to enhance potable water production. The study is structured in three phases. In the first phase the thermodynamic modelling based on the first law of thermodynamics is conducted. The investigate is to determine the effect of ambient temperature, relative humidity, current, fin length, on the performance of the system. The MATLAB R2024a platform is used for the modelling of the system. The modelling results indicates a maximum output of 71 mL.h⁻¹ for thermoelectric cooling and 121 mL.h⁻¹ for vapour adsorption cooling system at 95 % relative humidity. The design fabrication and performance investigation of the hybrid system is conducted in the second phase. The experimental results confirm a water output of 80.8 mL.h⁻¹, with thermo-electric cooling system contributing 18 mL.h⁻¹ and vapour adsorption cooling system 62.8 mL.h⁻¹ at 30 °C and 75 % relative humidity. In the third phase the economic analysis of the hybrid system is conducted. The hybrid system achieves a daily water output of 1.18 L.day⁻¹, with generation costs estimated at 0.33 $ per litre. The hybrid configuration outperforms standalone systems, offering improved scalability and operational efficiency. An economic analysis highlights its viability and potential as a sustainable solution to address global water scarcity challenges.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"330 ","pages":"Article 119665"},"PeriodicalIF":9.9,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143529250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Turning on ambient conditions hydrodeoxygenation of biobased aromatic alcohols through teaming 2D Pd (111) and P-coated carbon","authors":"Wang Kai ,&nbsp;Wei Xuemei ,&nbsp;Xu Haonan ,&nbsp;Mu Xinyuan ,&nbsp;Shi Yujian ,&nbsp;Yu Guoqi ,&nbsp;Shen Hualiang ,&nbsp;Cai Tao ,&nbsp;Luo Yanjuan ,&nbsp;Shang Tianbo ,&nbsp;Yan MingMing ,&nbsp;Shen Runpu","doi":"10.1016/j.enconman.2025.119690","DOIUrl":"10.1016/j.enconman.2025.119690","url":null,"abstract":"<div><div>The ambient conditions HDO process is always expected to achieve economically viable conversions, it is of great significance to humans, but it remains a huge challenge. Herein, for the first time, a strategy for normal-temperature and pressure hydrodeoxygenation of biobased aromatic alcohols <span><span>through teaming 2D Pd (111) and P-coated carbon</span><svg><path></path></svg></span> was proposed for chemoselective HDO of various aromatic alcohols with excellent performance under normal conditions (20 °C, 1.0 bar H₂). The C-OH bonds were selectively cleaved while leaving the aromatic moiety intact, and conversions for the targeted compounds exceeding 99.9 % in most cases. Furthermore, we confirmed satisfactory reusability of the 3Pd(111)/AC-P catalyst, being used in up to ten consecutive cycles without significant loss of activity or selectivity significantly. The pronounced effect on the HDO performance is primarily attributed to the synergistic effect for the Pd⁰-Pd^δ+-P species, which enhance the ability of the alcohol hydroxyl group to break under normal temperature and pressure conditions. This work paves the way for efficient and selective HDO reactions of aromatic alcohols under normal condition by utilizing effective palladium facet catalysts.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"331 ","pages":"Article 119690"},"PeriodicalIF":9.9,"publicationDate":"2025-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143527094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"RSM optimization of heat recovery from the chimneys of natural gas boilers using TEGs array: An approach for simultaneous generation of electric power and preheated water","authors":"S.H. Pourhoseini ,&nbsp;M. Mohammadpoor ,&nbsp;M. Baghban","doi":"10.1016/j.enconman.2025.119691","DOIUrl":"10.1016/j.enconman.2025.119691","url":null,"abstract":"<div><div>Natural gas as the cleanest fossil fuel has widespread application in households heating systems. However, natural gas has poor radiation and consequently a substantial amount of heat is wasted through the exhaust gas in the chimney of natural gas boilers. The focus of this work is application of Thermoelectric Generators (TEGs) arrays for recovering heat from the chimneys of natural gas boilers aimed at the simultaneous generation of electric power and preheated water and finding the optimum conditions for the process using Response Surface Methodology (RSM) optimization. A TEGs array consisting of 36 TEG modules was installed atop the exhaust gas chimney of a natural gas boiler and output power, flame temperature and energy conversion efficiency were recorded at different equivalence ratios, exhaust gas and water flow rates and co-current and counter-current flows. Finally, the optimum values of the process parameters were determined using RSM optimization. The results indicated that as the resistance of the load was equal to the internal resistance of the TEGs array, the output power was maximized. Furthermore, as the equivalence ratio increases, there is an optimum equivalence ratio such that in this equivalence ratio the output power is maximized. Also, compared to the co-current flow, counter-current flow of water raises the TEGs output power as much as 23.7 %. Finally, an increase in equivalence ratio in the range of 0.4 to 0.7 raises the combined energy conversion efficiency from 32.6 % to 45.8 %. The findings from the RSM optimization reveal a maximum output power of 18.49 W, which is attained by utilizing the optimal values of the parameters analyzed for the boilers. Specifically, these values are an equivalence ratio of 0.7, an exhaust gas flow rate of 201.14 kg/h, and a water flow rate of 2.5 L/min.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"331 ","pages":"Article 119691"},"PeriodicalIF":9.9,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143527224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dynamic performance analysis and climate zone-based design of a seasonal solar thermochemical energy storage and heating system in China","authors":"Lexiao Wang,&nbsp;Yimo Luo,&nbsp;Liming Wang,&nbsp;Gesang Yang","doi":"10.1016/j.enconman.2025.119688","DOIUrl":"10.1016/j.enconman.2025.119688","url":null,"abstract":"<div><div>The prospects of solar heating in China are promising, but solar energy’s intermittency and variability challenge its alignment with winter heating demands. Seasonal thermochemical energy storage (TCES) offers a viable solution by enabling the temporary storage of thermal energy in summer for subsequent winter use. However, the practical application of seasonal TCES technology is limited due to a lack of dynamic performance analysis, control method formulation, and comprehensive system evaluation. Therefore, the study investigated a seasonal TCES system coupled with solar collectors for space heating, with MATLAB and TRNSYS for joint simulation. The dynamic performance of the system and its application in different climate zones in China was explored. Results indicated that the system could effectively store solar heat in summer and provide continuous heating in winter. Based on the climatic divisions of China, the relationships among the system heat release, mass flow rate and the volumetric heat transfer rates were fitted and summarized. Additionally, for the target building located in Changsha of China, the optimal supply–demand ratio of the system was determined to be 1.5:1, achieving an annual heating capacity of 1565.22 kWh, a System Coefficient of Performance (SCOP) of 1.492, and an hourly room temperature satisfaction rate of 96.97%. It was expected that the system could reduce CO₂ emissions by approximately 52.16% compared with traditional coal heating. All the results indicated that the system had great application potential, and the proposed design methods for different climate zones could promote its widespread use.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"331 ","pages":"Article 119688"},"PeriodicalIF":9.9,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143518853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Static aerodynamic analysis of bio-inspired wind turbine efficiency: Modeling Borneo camphor seed blade designs and their parallel plate arrangements","authors":"H.Y. Peng ,&nbsp;Y.J. Chu ,&nbsp;H.F. Lam ,&nbsp;H.J. Liu ,&nbsp;S.Y. Sun","doi":"10.1016/j.enconman.2025.119681","DOIUrl":"10.1016/j.enconman.2025.119681","url":null,"abstract":"<div><div>Inspired by the rotating descent of the Borneo camphor seed, this study employs its cambered wing sections for turbine blade design, modeled using computational fluid dynamics simulations to predict power and torque. In phase one, five types of seed’s wings are modeled under varying fold axis and fold angle configurations. The results identify that wing type 3 exhibits the highest peak power coefficient (0.4328) and torque (2.1310 Nm), leading to its selection for phase two. This phase involves designing flat-plate blade counterparts with varying fold numbers and different levels of fold axis and fold angle to implement the seed’s natural geometry in a cost-effective manner. The results demonstrate that the four-fold configuration achieved a high peak power coefficient of 0.3637, closely followed by the two-fold configuration at 0.3510, indicating a minimal performance difference. This indicates that the increase of fold numbers makes peak power coefficient converge to a maximum value. The two-folds design, therefore, emerges as a practical, cost-efficient option for such bio-inspired wind turbines. The findings of phase one and phase two indicate that both cambered and flat-plate biomimetic models are viable and competitive in the wind turbine industry.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"331 ","pages":"Article 119681"},"PeriodicalIF":9.9,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143527223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hybrid Machine learning models for PV output prediction: Harnessing Random Forest and LSTM-RNN for sustainable energy management in aquaponic system","authors":"Tresna Dewi,&nbsp;Elsa Nurul Mardiyati,&nbsp;Pola Risma,&nbsp;Yurni Oktarina","doi":"10.1016/j.enconman.2025.119663","DOIUrl":"10.1016/j.enconman.2025.119663","url":null,"abstract":"<div><div>Accurately forecasting photovoltaic (PV) System output is vital for optimizing energy management in sustainable aquaponic systems, where fluctuating solar irradiance poses significant challenges. This study presents a hybrid Long Short-Term Memory Recurrent Neural Network (LSTM-RNN) and Random Forest (RF) model to address these challenges effectively. By integrating LSTM-RNN’s capability to model temporal dependencies with RF’s strength in feature selection and non-linear data handling, the model demonstrates superior predictive accuracy across parameters such as voltage, current, power, and irradiance. Advanced preprocessing steps, including normalization and sequence transformation, are employed to align datasets with temporal patterns, enhancing the model’s learning efficiency. Evaluation metrics, such as Root Mean Squared Error (RMSE) and Mean Absolute Error, validate the model’s precision, with RMSE values of 0.0768 for voltage, 0.037 for current, and 0.0363 for irradiance, outperforming standalone LSTM (RMSE &gt; 5 %) and RF models. The RF component prioritizes critical predictors like solar irradiance and temperature, contributing 45 % and 22 % to accuracy, respectively. The hybrid model supports efficient energy storage during peak sunlight and consistent power distribution during low irradiance, ensuring reliable operation of aquaponic systems for water circulation and lighting. Its scalability and adaptability make it a promising tool for improving energy efficiency and reducing operational costs. Future research will explore its application in larger PV installations and integration with weather forecasts, enhancing performance under diverse environmental conditions. This study underscores the transformative potential of hybrid models in advancing renewable energy forecasting and promoting agricultural sustainability.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"330 ","pages":"Article 119663"},"PeriodicalIF":9.9,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143526613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Production of jet fuel-range bio-hydrocarbons over nickel-based catalysts through hydrothermolysis without external H2: Effect of nanoporous supports","authors":"Suparkorn Sedtabute ,&nbsp;Tharapong Vitidsant ,&nbsp;Chawalit Ngamcharussrivichai","doi":"10.1016/j.enconman.2025.119679","DOIUrl":"10.1016/j.enconman.2025.119679","url":null,"abstract":"<div><div>Bio-aviation fuel, commonly referred to as bio-jet fuel, represents a critical advancement over recent decades, aligning with sustainable energy goals and efforts to mitigate climate change. Catalytic hydrothermolysis is a promising method for producing bio-jet fuel hydrocarbons from biomass without external H₂. This work examined hydrothermolysis of palm oil to produce jet fuel-range bio-hydrocarbons using nickel (Ni)-based catalysts supported on different nanoporous materials, including a proton-form ultra-stable Y (HUSY) zeolite and Santa Barbara Amorphous-15-based mesostructured siliceous (SBA-15) and aluminosilicate (Al-SBA-15) materials. The key properties of these supports were high specific surface area, high thermal stability, shape-selective properties, and tunable acidic properties, which provided the catalysts with bifunctionality for hydrogenation, deoxygenation, and acid-catalyzed reactions. Dealumination of HUSY through mild acid treatment was evaluated for its impact on structural and acidic properties of resulting support material (HUSY-AW). Under optimal conditions (400 °C, 10 wt% catalyst loading, 3-h reaction, and 1:1 oil/water volume ratio), Ni/HUSY-AW achieved the highest yield of alkanes, up to 61.54 %, and an aromatic content of up to 35.17 %. The results obtained suggest that HUSY zeolite, with enhanced mesoporosity and increased active site availability from the acid treatment in Ni/HUSY-AW, improved reactant access and facilitated catalytic reactions. This study contributes to achieving sustainable development goals (SDG) by advancing renewable energy technologies (SDG 7), mitigating climate change impacts through reduced greenhouse gas emissions (SDG 13), and promoting efficient utilization of resources (SDG 12).</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"331 ","pages":"Article 119679"},"PeriodicalIF":9.9,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143527211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Simulation-based study on a dual-circuit design for achieving continuous power generation in Ge-sensitized thermal cells under isothermal conditions","authors":"Keting Chen ,&nbsp;Mie Tohnishi ,&nbsp;Akihiro Matsutani ,&nbsp;Sachiko Matsushita","doi":"10.1016/j.enconman.2025.119678","DOIUrl":"10.1016/j.enconman.2025.119678","url":null,"abstract":"<div><div>The semiconductor-sensitized thermal cell (STC) is a groundbreaking thermoelectric technology capable of converting low-temperature heat (&lt;200 °C) directly into electricity. It is based on a redox reaction initiated by thermally excited carriers in a semiconductor. One of its most appealing features is that once the STC reaches discharge termination, power generation can be restored by turning off the switch and leaving it in the heat source. However, during this recovery period, no power is generated, which significantly affects the efficiency of the STC system. To address this issue, this study proposes a dual-circuit STC model utilizing interdigitated array (IDA) electrodes, designed to eliminate recovery time and enable continuous power generation by alternating between two circuits within a single STC. Simulation and experimental methods were employed to assess the performance of this model. Two-dimensional (2D) simulations of the battery structure confirm that circuit switching triggers the redox reaction in the alternate circuit with sufficient reactant ions, enabling continuous discharge. Experimental results validate the continuous power generation observed in the fabricated cells. The dual-circuit system achieves an open circuit voltage Voc of approximately 270 mV (for both circuits) and a short circuit current Isc of around 0.30 μA (Jsc of 5 μA/cm²), demonstrating significant potential for application in IoT devices.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"331 ","pages":"Article 119678"},"PeriodicalIF":9.9,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143518854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Energy, exergy, and economic analyses of a novel liquid air and pumped thermal combined energy storage system","authors":"Junxian Li ,&nbsp;Zhikang Wang ,&nbsp;Yihong Li ,&nbsp;Guqiang Wei ,&nbsp;Wei Ji ,&nbsp;Xiaoyu Fan ,&nbsp;Zhaozhao Gao ,&nbsp;Liubiao Chen ,&nbsp;Junjie Wang","doi":"10.1016/j.enconman.2025.119675","DOIUrl":"10.1016/j.enconman.2025.119675","url":null,"abstract":"<div><div>Liquid air energy storage (LAES) and pumped thermal energy storage (PTES) are geographically unconstrained and environmentally friendly, holding great potential for large-scale energy storage. The key similarity between LAES and PTES is that both systems require cold storage units, which typically use a flammable and explosive liquid-phase alkane medium or an inefficient solid-phase rock medium, posing challenges in terms of safety, environmental protection, and energy efficiency. This study presents a novel energy storage system that integrates LAES and PTES (PT-LAES), effectively eliminating the need for individual cold storage units. During the energy storage phase, the cold energy generated by PTES gas expansion is used for LAES air liquefaction, while during the energy release phase, the cold energy from LAES liquid air is utilized for PTES low-temperature compression. This paper investigates key parameters, including the effects of LAES and PTES unit charging and discharging pressures on system performance. Energy, exergy, and economic analyses of PT-LAES are also conducted. Results indicate that the proposed PT-LAES achieves an RTE of 56.57 % and the energy storage density of 167.53 <span><math><mrow><mi>kWh</mi><mo>/</mo><msup><mrow><mi>m</mi></mrow><mn>3</mn></msup></mrow></math></span>. Compared to stand-alone systems, PT-LAES demonstrates better economics with a payback period of 7 years, an NPV of 187.2 million USD over 30 years, and an LCOE of 0.122 <span><math><mrow><mi>USD</mi><mo>/</mo><mi>k</mi><mi>W</mi><mi>h</mi></mrow></math></span>.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"330 ","pages":"Article 119675"},"PeriodicalIF":9.9,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143510417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Energy, exergy, economic, and environmental assessment and performance optimization of dual-stage discharge Carnot battery systems for floating liquefied natural gas","authors":"Zhe Wang ,&nbsp;Han Liu ,&nbsp;Changhao Jiang ,&nbsp;Sijun Liu ,&nbsp;Yulong Ji ,&nbsp;Fenghui Han","doi":"10.1016/j.enconman.2025.119676","DOIUrl":"10.1016/j.enconman.2025.119676","url":null,"abstract":"<div><div>Floating liquefied natural gas platforms offer a flexible solution for offshore natural gas production, storage, and transfer, but their energy-intensive operations require reliable power supply. This study investigates the use of Carnot batteries to enhance power reliability and energy efficiency on floating liquefied natural gas platforms by effectively utilizing the inherent cold energy of liquefied natural gas. A dual-stage discharge strategy is proposed, where the cold energy of liquefied natural gas is first stored and later reheated using low-temperature oceanic waste heat for a second discharge phase. A thermodynamic model of the floating liquefied natural gas-Carnot battery system is developed, and a comprehensive energy, exergy, economic, and environmental analysis is conducted to assess the impact of key parameters on system performance. Multi-objective optimization using genetic algorithms is employed to optimize system efficiency and operational requirements. The dual-stage discharge system increased round-trip efficiency from 82.4% to 86.2%, while discharge power was enhanced from 1008.8 kW over 4 h in the first stage to an additional 94.4 kW over 17.6 h in the second. The results demonstrate significant improvements in both exergy and round-trip efficiency through strategic adjustments. The proposed system offers substantial potential for enhancing energy utilization on floating liquefied natural gas platforms and provides a scalable solution with promising applications for offshore natural gas operations.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"330 ","pages":"Article 119676"},"PeriodicalIF":9.9,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143510413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}