Energy Conversion and Management最新文献_第9页

Intelligent self-adaption of marine engine degradation based on a digital-twin model 基于数字孪生模型的船舶发动机退化智能自适应

IF 9.9 1区工程技术

Energy Conversion and Management Pub Date : 2025-06-13 DOI: 10.1016/j.enconman.2025.119995

Long Liu , Weiyang Shao , Yusheng Yan , Dai Liu , Jian Zhang

{"title":"Intelligent self-adaption of marine engine degradation based on a digital-twin model","authors":"Long Liu , Weiyang Shao , Yusheng Yan , Dai Liu , Jian Zhang","doi":"10.1016/j.enconman.2025.119995","DOIUrl":"10.1016/j.enconman.2025.119995","url":null,"abstract":"<div><div>Marine engine performance would be degraded due to component wear and tear during long-term operation. The degradation might be further serious if the marine engine is fueled with low/zero-carbon fuels. This research introduces an innovative adaptive digital twin (DT) framework to predict engine performance degradation with control shift of fuel injection and air intake system, due to nozzle hole wear, fuel supply system malfunctions, and valve train wear. The framework is confirmed by a model-in-the-loop system with three steps: benchmark engine modeling, degradation simulation and inverse solution by NSGA III. In the first step, a second-order response surface model (RSM) with a radial basis function (RBF) kernel is developed as a benchmark DT model, using various engine performance data. Since the high cost of marine engine experiments, the engine data was enlarged based on a sophisticated engine model. This model is then used in the second step to perform as a degrading engine by changing some of the parameters. This would cause performance deviations between the benchmark DT model and the degrading engine. In the third step, the NSGA-III algorithm is utilized to compensate the inputs of benchmark DT model, so that those performance deviations can be adaptively corrected. The results indicated that input offsets are identified with an error less than 4% and outputs deviations are predicted with relative error less than 0.9% between the corresponding DT model and degrading engine, which offers a reliable solution for accurate performance monitoring and control.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"341 ","pages":""},"PeriodicalIF":9.9,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144272000","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}

引用次数: 0

Coordinated energy management for EH with responsive demands considering hydrogen storage and PEV preheating in cold climates 协调能源管理的EH与响应需求考虑氢储存和PEV预热在寒冷气候

IF 9.9 1区工程技术

Energy Conversion and Management Pub Date : 2025-06-13 DOI: 10.1016/j.enconman.2025.120046

Hossam H.H. Mousa , Karar Mahmoud , Matti Lehtonen

{"title":"Coordinated energy management for EH with responsive demands considering hydrogen storage and PEV preheating in cold climates","authors":"Hossam H.H. Mousa , Karar Mahmoud , Matti Lehtonen","doi":"10.1016/j.enconman.2025.120046","DOIUrl":"10.1016/j.enconman.2025.120046","url":null,"abstract":"<div><div>The energy hub (EH) is designed to optimize the management of diverse energy demands, such as electrical, thermal, and natural gas (NG) requirements. To achieve this target, modern EHs integrate a variety of assets such as renewable energy sources (RESs), energy storage systems (ESSs), plug-in electric vehicles (PEVs), hydrogen systems, and a combination of other multi-carrier energy systems (MESs). In recent years, the adoption of PEVs has grown significantly as part of sustainability efforts. However, their charging and discharging efficiency is highly sensitive to ambient temperature. Therefore, in cold climates like Finland, incorporating advanced preheating technologies for PEVs within smart EHs is essential for maintaining battery efficiency and ensuring optimal vehicle performance. In this regard, this paper proposes coordinated optimal operation strategies for smart EHs by integrating hydrogen storage systems (HSSs) and responsive demands. The proposed approach employs an optimization framework to efficiently manage energy flows and enhance the coordination of MESs. Additionally, the study introduces two preheating technologies, addressing both indoor and outdoor scenarios, to further improve PEV performance. By leveraging coordinated HSSs and advanced preheating solutions, the proposed model, as demonstrated by the results, achieves reductions in operational costs and emissions by 2.034% and 0.928%, respectively, while maintaining good battery efficiency and reliable vehicle performance during charging in low-temperature conditions.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"341 ","pages":"Article 120046"},"PeriodicalIF":9.9,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144272048","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}

引用次数: 0

Exploring a new approach to ancient Qanat techniques using earth-air and water-air heat exchangers for efficient natural cooling 探索利用土-空气和水-空气热交换器进行高效自然冷却的古坎儿井技术的新方法

IF 9.9 1区工程技术

Energy Conversion and Management Pub Date : 2025-06-13 DOI: 10.1016/j.enconman.2025.120066

Paz Montero–Gutiérrez , José Sánchez Ramos , Daniel Castro Medina , Teresa Palomo Amores , MCarmen Guerrero Delgado , Servando Álvarez Domínguez

{"title":"Exploring a new approach to ancient Qanat techniques using earth-air and water-air heat exchangers for efficient natural cooling","authors":"Paz Montero–Gutiérrez , José Sánchez Ramos , Daniel Castro Medina , Teresa Palomo Amores , MCarmen Guerrero Delgado , Servando Álvarez Domínguez","doi":"10.1016/j.enconman.2025.120066","DOIUrl":"10.1016/j.enconman.2025.120066","url":null,"abstract":"<div><div>The growing demand for sustainable climate adaptation in cities has intensified interest in passive, energy-efficient cooling systems, especially for semi-open public spaces where conventional air-conditioning solutions are often inefficient. This study proposes a novel reinterpretation of the Persian Qanat system, integrating it with contemporary engineering through Earth-Air and Water-Air Heat Exchangers to create nature-based infrastructure for urban cooling. The experimental set-up is installed at full scale in a public space and includes buried ducts interacting with the soil and submerged ducts connected to a water reservoir named Qanat. The system operates in two phases: daytime cooling by passive heat exchange and nighttime regeneration using evaporative and radiative cooling to restore thermal capacity. Performance was assessed through continuous environmental monitoring, including air, soil and water temperatures, and cooling energy calculations. The results indicate air temperature reductions of up to 8 °C between the inlet and outlet of the ducts during the hottest hours of the day. At night, evaporative regeneration reduced the soil temperature to 23 °C, improving the cooling potential for the following day. The energy analysis showed daily cooling values reaching up to 19 kWh. These findings confirm the potential of the system as a scalable and sustainable climate solution, enhancing thermal comfort in urban environments while recovering ancestral techniques adapted through modern design.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"341 ","pages":"Article 120066"},"PeriodicalIF":9.9,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144279148","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}

引用次数: 0

An ultra-high-temperature geothermal battery for sustainable solar power 用于可持续太阳能发电的超高温地热电池

IF 9.9 1区工程技术

Energy Conversion and Management Pub Date : 2025-06-13 DOI: 10.1016/j.enconman.2025.119892

Putra H. Agson-Gani , Klaus Regenauer-Lieb , Robert A. Taylor , Hamid Roshan , Sheikh S. Rahman

{"title":"An ultra-high-temperature geothermal battery for sustainable solar power","authors":"Putra H. Agson-Gani , Klaus Regenauer-Lieb , Robert A. Taylor , Hamid Roshan , Sheikh S. Rahman","doi":"10.1016/j.enconman.2025.119892","DOIUrl":"10.1016/j.enconman.2025.119892","url":null,"abstract":"<div><div>This study proposes a novel geothermal battery system that combines concentrated solar thermal power (CSP) with ultra-high temperature underground thermal energy storage (UHT-UTES) to address limitations in current high-temperature energy storage technologies. By utilising CSP waste heat, this approach aims to surpass the temperature constraints of existing CSP and UTES systems, enhancing geothermal power generation and enabling a scalable, long-duration energy storage solution. A validated one-dimensional analytical model is developed to evaluate heat transfer dynamics and thermal front propagation within the UHT-UTES system. The analytical model is validated against numerical results for both fractured and porous reservoirs, confirming its reliability for simulating subsurface thermal behaviour. The study focuses on three key objectives: (1) determining the optimal geothermal battery size based on available CSP waste heat, (2) quantifying efficiency gains in the bottoming cycle from surplus waste heat, and (3) assessing long-term performance through a depletion phase. Results indicate that the integrated system can sustain an additional net thermal power output exceeding <em>n</em> <span><math><mo>×</mo></math></span> 114 MW for 30 years (with<em>n</em> the number of non-interfering well doublets in the reservoir). Post decomissioning of the CSP the system allows 30 years of gradual depletion, underscoring its long-term energy storage potential and sustainability. Compared to conventional geothermal-Organic Rankine Cycle (ORC) systems, the proposed configuration delivers an average thermal energy gain of 70%. This research establishes a foundation for future studies on the technical, economic, and environmental implications of CSP integration, with a reference case based on an operational geothermal site in Indonesia.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"341 ","pages":"Article 119892"},"PeriodicalIF":9.9,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144279714","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}

引用次数: 0

Technoeconomics of a molten salt/supercritical carbon dioxide heat exchanger with fractal-textured corrosion resistant coatings for concentrating solar thermal systems 聚光太阳能热系统熔盐/超临界二氧化碳热交换器的分形织体耐腐蚀涂层技术经济学

IF 9.9 1区工程技术

Energy Conversion and Management Pub Date : 2025-06-12 DOI: 10.1016/j.enconman.2025.120028

K. Nithyanandam , K. Kant, P. Kondaiah, R. Pitchumani

{"title":"Technoeconomics of a molten salt/supercritical carbon dioxide heat exchanger with fractal-textured corrosion resistant coatings for concentrating solar thermal systems","authors":"K. Nithyanandam , K. Kant, P. Kondaiah, R. Pitchumani","doi":"10.1016/j.enconman.2025.120028","DOIUrl":"10.1016/j.enconman.2025.120028","url":null,"abstract":"<div><div>Molten salt/supercritical carbon dioxide heat exchangers are integral to the operation of Generation 3 concentrating solar thermal systems, which play a key role in facilitating the decarbonization of power generation and industrial sectors by reducing reliance on fossil fuels and curbing greenhouse gas emissions. At the targeted operating temperatures of about 750 °C, molten carbonate and molten chloride salts are two viable heat transfer fluids and thermal energy storage media. However, their extreme corrosivity at high temperatures limits the containment materials choice to expensive alloys such as Haynes 230, which increases the levelized cost of energy. Toward addressing the materials and cost challenge, this paper presents a detailed technoeconomic analysis of a molten salt/supercritical carbon dioxide heat exchanger made of low-cost ferrous alloys with novel fractal-textured corrosion-resistant coatings as tube and shell materials. The coatings impressively reduce the corrosion rate on the alloys to be lower than or on par with Haynes 230. Considering different alloy materials, the study systematically demonstrates that the levelized cost of a heat exchanger with coated low-cost ferrous alloys is lower than that with Haynes 230 by 60 % and 63 % for molten carbonate and chloride salts, respectively. The study establishes for the first time that low-cost ferrous alloys with fractal textured corrosion-resistant coatings are technoeconomically superior alternatives to Haynes 230 in Gen3 CSP systems, with broader application to molten salt nuclear reactor systems as well.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"341 ","pages":"Article 120028"},"PeriodicalIF":9.9,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144263842","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}

引用次数: 0

Thermo-sensitive tracer technology to monitor the movement of thermal front in geothermal energy production 地热能生产中热锋运动监测的热敏示踪技术

IF 9.9 1区工程技术

Energy Conversion and Management Pub Date : 2025-06-12 DOI: 10.1016/j.enconman.2025.120056

Dejian Zhou , Alexandru Tatomir , Huhao Gao , Quan Liu , Martin Sauter

{"title":"Thermo-sensitive tracer technology to monitor the movement of thermal front in geothermal energy production","authors":"Dejian Zhou , Alexandru Tatomir , Huhao Gao , Quan Liu , Martin Sauter","doi":"10.1016/j.enconman.2025.120056","DOIUrl":"10.1016/j.enconman.2025.120056","url":null,"abstract":"<div><div>Thermo-sensitive tracers hold significant potential for enhancing the understanding of heat transfer in porous media and ascertain financial revenues by reducing reservoir lifetime prediction uncertainty. This study develops an analytical solution based on the hydrolysis of thermo-sensitive tracer, enabling dynamically monitoring of thermal front movement within the ideal geothermal reservoir. The accuracy of the analytical solution is validated through comparisons with simulation results and experimental data. Results show that the analytical solution can accurately estimate the thermal front positions, with the overall correlation coefficients exceeding 0.99 and 0.98 against simulation and experiment results. Additionally, the solution can precisely predict the front positions beyond observation points, with the temperatures at predicted positions maintained at 306 K. However, the prediction accuracy is highly sensitive to the velocity distribution within the reservoir, with the maximum estimation error reaching approximately 50 % in cases of unknown velocity distribution. Despite this limitation, the analytical solution shows strong versatility, functioning effectively under a wide range of operational parameters, i.e., injection rate, and reservoir environments, i.e., initial reservoir temperature and porosity.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"341 ","pages":"Article 120056"},"PeriodicalIF":9.9,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144272051","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}

引用次数: 0

Salinity-gradient based osmotic energy conversion enhanced by waste heat generated from proton exchange membrane electrolyzer 质子交换膜电解槽余热增强基于盐度梯度的渗透能转换

IF 9.9 1区工程技术

Energy Conversion and Management Pub Date : 2025-06-12 DOI: 10.1016/j.enconman.2025.120064

Yu Qian, Xianlin Tang, Wanjie Li, Pengfei Wang, Qinlong Ren

{"title":"Salinity-gradient based osmotic energy conversion enhanced by waste heat generated from proton exchange membrane electrolyzer","authors":"Yu Qian, Xianlin Tang, Wanjie Li, Pengfei Wang, Qinlong Ren","doi":"10.1016/j.enconman.2025.120064","DOIUrl":"10.1016/j.enconman.2025.120064","url":null,"abstract":"<div><div>Proton exchange membrane electrolyzer is an essential device to generate hydrogen from water. However, a huge amount of low-grade waste thermal energy is generated during hydrogen production process of proton exchange membrane electrolyzer. Furthermore, osmotic energy conversion is capable of harnessing salinity-gradient energy in natural water sources to produce electricity. Nevertheless, salinity-gradient osmotic energy conversion suffers from an issue of relatively low power density. The current work reports a hybrid system that integrates a proton exchange membrane electrolyzer with an osmotic energy conversion module, harnessing the waste heat produced by the electrolyzer to improve both osmotic power density and overall systematic energy efficiency. A one-dimensional finite difference model is firstly developed to analyze performance of proton exchange membrane electrolyzer. Then, a three-branch bipolar plate of proton exchange membrane electrolyzer is designed to enhance heat transfer between water and its electrodes for waste heat utilization. When the waste heat generated during water electrolysis is used to raise up freshwater pumped into osmotic energy conversion device from 20 °C to 40.3 ℃, 43.9 ℃, and 47.5 ℃, the corresponding osmotic power density using graphene oxide membrane is elevated from 6.32 W/m<sup>2</sup> to 9.82 W/m<sup>2</sup>, 10.67 W/m<sup>2</sup>, and 11.54 W/m<sup>2</sup> by 55.4 %, 68.8 %, and 82.6 %, respectively. The current work introduces a promising strategy for enhancing salinity-gradient osmotic power generation performance by effectively harnessing waste thermal energy produced within proton exchange membrane electrolyzer during hydrogen production, which shows great potential for industrial renewable energy applications.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"341 ","pages":"Article 120064"},"PeriodicalIF":9.9,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144263843","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}

引用次数: 0

Comparative techno-economic analysis of integrated solar PV and methane–methanol production systems for enhanced waste management solutions 综合太阳能光伏和甲烷-甲醇生产系统的技术经济比较分析，以增强废物管理解决方案

IF 9.9 1区工程技术

Energy Conversion and Management Pub Date : 2025-06-12 DOI: 10.1016/j.enconman.2025.120050

Eshagh Safarzadeh Ravajiri , Iman Alizadeh Binazir , Ehsan Houshfar

{"title":"Comparative techno-economic analysis of integrated solar PV and methane–methanol production systems for enhanced waste management solutions","authors":"Eshagh Safarzadeh Ravajiri , Iman Alizadeh Binazir , Ehsan Houshfar","doi":"10.1016/j.enconman.2025.120050","DOIUrl":"10.1016/j.enconman.2025.120050","url":null,"abstract":"<div><div>As the global demand for sustainable energy solutions grows, the integration of renewable technologies into waste management systems has gained significant attention. This study investigates the integration of power-to-gas (P2G) and power-to-liquid (P2L) technologies within waste management units through a comprehensive techno-economic analysis. Multi-objective optimization was conducted to determine the optimal number of solar photovoltaic (PV) panels, aiming to maximize the Cumulative Fuel Production Potential (CFPP) while minimizing the Total Annual Cost (TAC). Five distinct scenarios were proposed, validated, and compared from technical, economic, and environmental perspectives. The five scenarios involve combinations of anaerobic digestion, gasification, mechanical biological treatment, power-to-gas, and power-to-liquid technologies for sustainable waste management and fuel production. The first scenario focuses on methane production, the second focuses on methanol production, and the other three focus on co-production of methane and methanol. The optimization revealed that scenarios 2 to 5 required approximately 8,500 to 8,900 solar PV panels, while scenario 1 necessitated only half that amount, indicating a consistent hydrogen demand across scenarios. Technically, scenario 3 exhibited the highest CFPP at 9.25 MJ/kg<sub>MSW</sub>, showcasing significant fuel production potential. Economically, scenario 1 demonstrated the lowest TAC, while scenario 5 had the highest, suggesting that anaerobic digestion is more cost-effective than gasification. Environmentally, scenario 1 and scenario 5 also showed the lowest Global Warming Potential (GWP), highlighting the advantages of combining power-to-liquid and power-to-gas technologies in reducing carbon footprints. Overall, scenario 3 emerged as the most favorable option due to its optimal balance of high CFPP and moderate TAC.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"341 ","pages":"Article 120050"},"PeriodicalIF":9.9,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144263856","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}

引用次数: 0

The potential of waste heat utilization in solar multistage membrane distillation: An alternative to PV + RO systems? 太阳能多级膜蒸馏余热利用的潜力：PV + RO系统的替代方案？

IF 9.9 1区工程技术

Energy Conversion and Management Pub Date : 2025-06-12 DOI: 10.1016/j.enconman.2025.119977

Primož Poredoš , Jintong Gao , Abdallah Y.M. Ali , He Shan , Zhenyuan Xu , Eva Zavrl , Tej Žižak , Dejan J. Trajkovski , Ciril Arkar , Ruzhu Wang

{"title":"The potential of waste heat utilization in solar multistage membrane distillation: An alternative to PV + RO systems?","authors":"Primož Poredoš , Jintong Gao , Abdallah Y.M. Ali , He Shan , Zhenyuan Xu , Eva Zavrl , Tej Žižak , Dejan J. Trajkovski , Ciril Arkar , Ruzhu Wang","doi":"10.1016/j.enconman.2025.119977","DOIUrl":"10.1016/j.enconman.2025.119977","url":null,"abstract":"<div><div>Solar membrane distillation (MD) is an emerging technology for addressing water scarcity in arid regions with access to terrestrial water bodies. Recent studies highlight that vaporization enthalpy recycling enhances both distillate flux and solar-to-water efficiency. However, due to high material costs, scaling beyond 10 stages under one-sun solar illumination becomes economically unfeasible. A novel waste heat utilization concept for continuous freshwater production is introduced, supported by a generalized Python-based mathematical model and COMSOL Multiphysics simulations that consider simultaneous heat and moisture transfer. The findings highlight the potential of low-grade waste heat to enhance the efficiency of MD processes. With a solar-to-waste heat ratio of 0.4, a 9-stage MD system can match PV + RO water production per exergy use (36.2 L kWh<sup>-1</sup>), while even a 3-stage MD system operating solely on waste heat surpasses PV + RO performance. This highlights the importance of cross-sectoral integration, where polygeneration, water, and electricity production play a key role. Techno-economic analysis indicates that such a system in Spain could achieve a 6-year payback period, reinforcing its potential as a competitive alternative to PV + RO for freshwater production. This work contributes to UN Sustainable Development Goals 6 and 7 (SDG-6, SDG-7), promoting clean water, sanitation, and sustainable energy solutions.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"341 ","pages":"Article 119977"},"PeriodicalIF":9.9,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144272050","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}

引用次数: 0

Performance evaluation of the natural gas combined cycle with various hydrogen co-firing rates 不同氢共燃速率下天然气联合循环的性能评价

IF 9.9 1区工程技术

Energy Conversion and Management Pub Date : 2025-06-11 DOI: 10.1016/j.enconman.2025.120051

Hyeonrok Choi , Youngjae Lee , Won Yang , Changkook Ryu , Seong-il Kim

{"title":"Performance evaluation of the natural gas combined cycle with various hydrogen co-firing rates","authors":"Hyeonrok Choi , Youngjae Lee , Won Yang , Changkook Ryu , Seong-il Kim","doi":"10.1016/j.enconman.2025.120051","DOIUrl":"10.1016/j.enconman.2025.120051","url":null,"abstract":"<div><div>Hydrogen is a promising carbon-free fuel for reducing CO<sub>2</sub> emissions in power generation and is increasingly being integrated into gas turbine combined cycle (GTCC) systems. This study evaluates the thermal performance of a 600-MWe-class GTCC plant under hydrogen co-firing by analyzing two idealized operational scenarios—fixed turbine inlet temperature (TIT) and fixed gas turbine (GT) output—and additionally proposes a load-following strategy that maintains constant total GTCC output. A process simulation model was used to assess the impact of hydrogen blending on GT performance, flue gas composition, and the bottoming cycle—including the heat recovery steam generator (HRSG) and steam turbine (ST)—under three ambient conditions.</div><div>Hydrogen co-firing introduced a performance trade-off: GT efficiency improved due to favorable combustion properties, while ST output decreased owing to degraded HRSG heat transfer. Under the fixed TIT scenario, GT efficiency increased with minor reductions in ST output. In contrast, under fixed GT output, TIT and turbine exit temperature (TET) declined, significantly reducing steam temperature and ST output, especially at high hydrogen blending ratios. The greatest performance degradation occurred under the lowest TIT condition. To address this trade-off, an additional scenario was developed by regulating TIT to adjust the GT/ST power split and maintain constant GTCC output. This approach resulted in thermal efficiency gains of up to 0.72 percentage points. The proposed model incorporates radiative and convective heat transfer mechanisms and captures the key thermophysical effects of hydrogen-rich combustion gas, offering practical insights for stable and efficient GTCC operation under hydrogen co-firing conditions.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"341 ","pages":"Article 120051"},"PeriodicalIF":9.9,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144254198","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}

引用次数: 0