Energy Conversion and Management最新文献_第10页

Maximizing solar photovoltaic efficiency with Mist Cooled sandwich bifacial panels under extreme hot climate conditions 在极端炎热的气候条件下，最大限度地提高了雾冷夹层双面板的太阳能光伏效率

IF 9.9 1区工程技术

Energy Conversion and Management Pub Date : 2025-05-03 DOI: 10.1016/j.enconman.2025.119865

Zafar Said , Fahad Faraz Ahmad

{"title":"Maximizing solar photovoltaic efficiency with Mist Cooled sandwich bifacial panels under extreme hot climate conditions","authors":"Zafar Said , Fahad Faraz Ahmad","doi":"10.1016/j.enconman.2025.119865","DOIUrl":"10.1016/j.enconman.2025.119865","url":null,"abstract":"<div><div>A novel sandwich bifacial photovoltaic panel system with integrated mist cooling is proposed to enhance energy generation per unit area in photovoltaic installations. Traditional bifacial photovoltaic panels effectively utilize ground reflections. Still, they often encounter high operating temperatures, leading to thermal degradation. This new design features a back-to-back arrangement of two mono-facial photovoltaic panels, incorporating mist cooling between them. This innovative design significantly increases energy density while effectively mitigating thermal degradation. Experimental investigations were conducted under actual outdoor conditions representative of extremely hot climates, with the United Arab Emirates chosen as a specific case study. The experimental results show that the energy yield from the sandwich bifacial photovoltaic panel was 26.05 % higher than that of a standard monofacial photovoltaic panel operating without cooling. For the rear-facing photovoltaic surface temperature, a reduction of 34.03 % is observed for the front surface, and 14.81 % is recorded for the rear surface with mist cooling. The corresponding temperature reduction for the front-facing panel was 20.48 % on a sunny day and 13.18 % on a cloudy day, and the reduction in the rear surface was 9.61 % and 16.02 %, respectively. Such thermal enhancements are expected to yield power gains of 37.14 % on sunny days and 46.02 % on cloudy summer days compared to conventional mono-facial photovoltaic panels. The system demonstrated an annual energy output of 45.34 kWh/m<sup>2</sup> more than mono-facial systems, corresponding to an annual economic gain of $5.48/m<sup>2</sup>. This approach represents one very efficient and practical way to improve the photovoltaic performance without compromising the already-occupied ground surface.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"335 ","pages":"Article 119865"},"PeriodicalIF":9.9,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143900102","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 analysis of scenarios of data center waste heat utilization for district heating networks of different generations 不同代集中供热网络数据中心余热利用方案对比分析

IF 9.9 1区工程技术

Energy Conversion and Management Pub Date : 2025-05-02 DOI: 10.1016/j.enconman.2025.119856

D. Romanov, I. Chakraborty, S. Holler

{"title":"Comparative analysis of scenarios of data center waste heat utilization for district heating networks of different generations","authors":"D. Romanov, I. Chakraborty, S. Holler","doi":"10.1016/j.enconman.2025.119856","DOIUrl":"10.1016/j.enconman.2025.119856","url":null,"abstract":"<div><div>The growth of global telecommunication infrastructure offers significant opportunities for harnessing data center waste heat. This study focuses on analyzing and comparing several scenarios — business as usual (BAU), data center waste heat recovery (WH), and WH complemented by a shallow borehole thermal energy storage addressing the mismatch between heat demand and waste heat production (WH + BTES) — under various district heating (DH) temperatures representing different generations of DH networks. The north campus in Göttingen serves as a case study. We used a customized Python model, incorporating the pygfunction package and a regression-based heat pump model, to assess the thermal response factors (g-functions) of geothermal borehole fields and to perform the analysis. The results demonstrate that around 70 % of the considered heating and cooling demand can be covered in the WH scenario and additionally about 20 % in the WH+BTES scenario. Currently, the WH scenario is economically most promising, while the WH+BTES scenario allows for higher CO<sub>2</sub> savings. The sensitivity analysis further indicates that storing waste heat could become economical if the BTES capital cost were reduced by 35 % and the ratio of DH price to electricity price increased to 2.5 times the current value. For the WH scenario, the range of marginal waste heat prices was determined using Monte Carlo simulations. The average values obtained are 48, 56, 90, 93 €/MWh<sub>wh</sub> for the DH design supply temperatures of 120, 95, 70, 48 °C, respectively. Thus, low-temperature district heating operators can expect larger profits if waste heat prices are constant for all network temperatures.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"334 ","pages":"Article 119856"},"PeriodicalIF":9.9,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143895555","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

Multi-degree-of-freedom decoupled mechanism for improving energy harvesting performance of wave energy converter 提高波能转换器能量收集性能的多自由度解耦机构

IF 9.9 1区工程技术

Energy Conversion and Management Pub Date : 2025-05-02 DOI: 10.1016/j.enconman.2025.119850

Yongxing Zhang , Zhicong Huang , Jing Bian , Junwei Liu , Ning Su

{"title":"Multi-degree-of-freedom decoupled mechanism for improving energy harvesting performance of wave energy converter","authors":"Yongxing Zhang , Zhicong Huang , Jing Bian , Junwei Liu , Ning Su","doi":"10.1016/j.enconman.2025.119850","DOIUrl":"10.1016/j.enconman.2025.119850","url":null,"abstract":"<div><div>The multi-degree-of-freedom wave energy converter (MDWEC) has attracted much attention due to its potential to efficiently harvest wave energy. However, current designs of MDWECs seldom consider coupled motions between the floating body and the power take-off (PTO), resulting in a loss of energy harvesting efficiency. To bridge this research gap, this paper explores the decoupled mechanism of active drive mechanical structures used for the MDWEC energy harvesting scenario. This decoupled mechanism enables the operating axes of PTOs to align one-to-one with the motion degree-of-freedom (DOF) of the floating body, thereby overcoming the energy harvesting efficiency limitations of the MDWEC caused by the coupled motion. To illustrate this idea, a novel multi-DOF decoupled wave energy converter (MDD-WEC) is presented according to real wave site conditions. A multi-physical-domain numerical model is developed. According to the Froude criterion, the reduced-scale prototype is constructed, and the numerical model test is performed in a wave tank. The proposed structure’s motion response amplitudes obtained from wave tank experiments and numerical simulations under two irregular wave conditions showed relative errors below 5 %, confirming the numerical model’s accuracy. Based on this, multi-PTO parameter analysis is subsequently performed to reveal the effects of different PTO configurations on the energy harvesting performance of the MDD-WEC. Benefiting from this characteristic, each PTO in the MDD-WEC can be independently optimized to absorb more wave energy according to wave conditions. The performance comparison results demonstrated that, compared with the point absorber WEC and the parallel configuration WEC with multi-DOF, the proposed MDD-WEC increases the capture width ratio (CWR) by 72.5 % and 39.3 % under regular wave conditions, respectively, and by 60.8 % and 32.9 % under irregular wave conditions.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"334 ","pages":"Article 119850"},"PeriodicalIF":9.9,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143895556","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

Machine learning optimization of integrating an advanced thermal-electrochemical plant with an oxy-biogas fuel plant employing a CO2 capture process 将先进的热电化学装置与采用二氧化碳捕集工艺的氧-沼气燃料装置集成的机器学习优化

IF 9.9 1区工程技术

Energy Conversion and Management Pub Date : 2025-05-02 DOI: 10.1016/j.enconman.2025.119871

Milad Feili , Pejman Nourani , Maghsoud Abdollahi Haghghi , Ammar M. Bahman

{"title":"Machine learning optimization of integrating an advanced thermal-electrochemical plant with an oxy-biogas fuel plant employing a CO2 capture process","authors":"Milad Feili , Pejman Nourani , Maghsoud Abdollahi Haghghi , Ammar M. Bahman","doi":"10.1016/j.enconman.2025.119871","DOIUrl":"10.1016/j.enconman.2025.119871","url":null,"abstract":"<div><div>This study addresses boosting biogas utilization through oxy-fuel combustion and integrating an innovative multigeneration system. This system allows advanced thermal-electrochemical integration for electric power, cooling, heat, and liquefied hydrogen generation. This approach reduces energy loss and incorporates a CO<sub>2</sub> capture unit. Hence, the integrated subsystems include an oxy-biogas combustion power plant, a supercritical-CO<sub>2</sub> power plant, an organic Rankine cycle, an NH<sub>3</sub>-H<sub>2</sub>O combined coolant and power cycle, a solid oxide electrolysis cell, and a Claude hydrogen cycle. The study presents a complete examination covering thermodynamic, sustainability, and economic perspectives and detailed parametric assessments, showing the combustion temperature as the most influential parameter. Subsequently, an optimization process is conducted, employing a multi-objective strategy utilizing machine learning techniques based on artificial neural networks and multi-objective grey wolf optimization. Considering the tri-objective scenario with the exergy efficiency, net present value, and total unit cost of products as objective functions, their optimal values are calculated at 47.75 %, 17.72 M$, and 28.13 $/GJ, respectively. Under the tri-objective optimization scenario, the total exergy destruction equals 4630 kW, with the combustion chamber as the most important contributor. Also, the sustainability index and payback period are found at 1.92 and 17.7 M$, respectively. Besides, these conditions exhibit liquefied hydrogen output of 2.9 m<sup>3</sup>/day, costing 3.37 $/GJ. This research highlights that the integration of oxy-biogas fuel combustion with the designed multigeneration system can enhance biogas utilization, achieving improved thermodynamic efficiency and economic performance while supporting the sustainable production of high-value energy products.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"335 ","pages":"Article 119871"},"PeriodicalIF":9.9,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143900101","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

Solar-driven artificial tree desalination with enhanced stability and performance via structural and materials optimization 太阳能驱动的人造海水淡化，通过结构和材料的优化，增强了稳定性和性能

IF 9.9 1区工程技术

Energy Conversion and Management Pub Date : 2025-05-02 DOI: 10.1016/j.enconman.2025.119847

Zihao Zhu , Yahong Yu , Yingzong Liang , Xianglong Luo , Jianyong Chen , Zhi Yang , Ying Chen

{"title":"Solar-driven artificial tree desalination with enhanced stability and performance via structural and materials optimization","authors":"Zihao Zhu , Yahong Yu , Yingzong Liang , Xianglong Luo , Jianyong Chen , Zhi Yang , Ying Chen","doi":"10.1016/j.enconman.2025.119847","DOIUrl":"10.1016/j.enconman.2025.119847","url":null,"abstract":"<div><div>This study presents a novel solar-driven desalination artificial tree device designed to enhance sustainable freshwater production through a series of structural and material optimizations. A well-tuned draw solution is developed to improve system stability, enabling effective long-term operation with an evaporation layer featuring nanopores smaller than 100 nm. This enhancement allows for the use of a thinner anodized aluminum oxide membrane, reducing thermal resistance and facilitating efficient mass and heat transfer. The device structure is optimized into a compact, horizontal configuration, with a reduced air gap thickness to minimize vapor diffusion resistance and maximize sunlight absorption from multiple angles. As a result, the five-stage device achieves a steady-state water yield of 1.78 kg m<sup>-2</sup>h<sup>-1</sup> under 1 kW m<sup>-2</sup> light intensity with a 3.5 wt% NaCl solution—a 17.88% improvement over the pre-optimization design. The device exhibits stable freshwater production over multiple cycles, with an ion rejection rate approaching 99.9% and salinity levels well below the WHO.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"334 ","pages":"Article 119847"},"PeriodicalIF":9.9,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143895779","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

Unlocking heat pump flexibility: A multi-objective optimisation approach for self sufficiency and energy costs 解锁热泵灵活性：自给自足和能源成本的多目标优化方法

IF 9.9 1区工程技术

Energy Conversion and Management Pub Date : 2025-05-02 DOI: 10.1016/j.enconman.2025.119822

Christopher Gradwohl , Dan Cornelius Maxim , Shama Islam , Thomas Kienberger

{"title":"Unlocking heat pump flexibility: A multi-objective optimisation approach for self sufficiency and energy costs","authors":"Christopher Gradwohl , Dan Cornelius Maxim , Shama Islam , Thomas Kienberger","doi":"10.1016/j.enconman.2025.119822","DOIUrl":"10.1016/j.enconman.2025.119822","url":null,"abstract":"<div><div>The global energy landscape is undergoing a transformative shift towards cleaner, more sustainable, and renewable energy sources. However, the intermittent nature of renewable energy sources, limited storage capacity, and grid transport constraints introduce significant fluctuations in electricity supply and demand. To maintain grid stability and resilience, advanced flexibility measures are required, particularly in medium- to low-voltage networks. Heat pumps, when combined with thermal energy storage, present a promising solution by providing a controllable and adaptive load that aligns with grid conditions. This study explores the theoretical potential of flexible heat pump operation for heating in decentralised energy systems as a strategy for enhancing renewable energy integration and reducing local grid loads. In contrast to previous research that focuses on system design and sizing, this work emphasises optimal operational strategies through a multi-objective optimisation framework. A mixed-integer linear programming based multi-objective optimisation model is developed to simultaneously minimise household energy costs and alleviate strain on the low-voltage grid by optimising the degree of self-sufficiency. The framework incorporates various electrical and thermal synthetic load profiles, building types, living scenarios, photovoltaic system sizes, predefined heat pumps and energy storage capacities. Findings show that leveraging day-ahead energy prices as a demand-response strategy effectively manages price volatility, prevents grid peak loads and consumption, and increases degree of self-sufficiency while reducing energy costs. Results further indicate that the most significant benefits were achieved when using thermal energy storage and heat pumps as primary flexibility measures.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"334 ","pages":"Article 119822"},"PeriodicalIF":9.9,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143899599","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

Learning from the real-world: Insights on light-vehicle efficiency and CO2 emissions from long-term on-board fuel and energy consumption data collection 从现实世界中学习：从长期的车载燃料和能源消耗数据收集中对轻型汽车效率和二氧化碳排放的见解

IF 9.9 1区工程技术

Energy Conversion and Management Pub Date : 2025-05-02 DOI: 10.1016/j.enconman.2025.119816

Alessandro Tansini , Andres L. Marin , Jaime Suarez , Nestor F. Aguirre , Georgios Fontaras

{"title":"Learning from the real-world: Insights on light-vehicle efficiency and CO2 emissions from long-term on-board fuel and energy consumption data collection","authors":"Alessandro Tansini , Andres L. Marin , Jaime Suarez , Nestor F. Aguirre , Georgios Fontaras","doi":"10.1016/j.enconman.2025.119816","DOIUrl":"10.1016/j.enconman.2025.119816","url":null,"abstract":"<div><div>This study explores the potential of On-Board Fuel and energy Consumption Monitoring (OBFCM) and telemetry to bridge the knowledge gap in real-world vehicle usage and fuel/energy consumption. Driving data from 50 light-duty vehicles with different technologies was collected over-the-air through OBD dongles and analysed (data is made available online), highlighting elements of vehicles real-world operation complementing the official OBFCM datasets. Fuel and energy consumption metrics are presented for the vehicle technologies captured, together with an analysis of the real-world factors affecting them. Internal Combustion Engine Vehicles (ICEVs) and Mild Hybrid Electric Vehicles (MHEVs) are mostly affected by urban driving, with a fuel increase of up to +1.20 l/100 km. Hybrid Electric Vehicles (HEVs) and Plug-in Hybrid Electric Vehicles (PHEVs) are mostly affected by motorway driving, with an increase of +1.26 and +3.85 l/100 km respectively. Extreme ambient temperatures affect ICEVs and MHEVs (up to +1 l/100 km) less than HEVs and PHEVs (+1.5 l/100 km and more). Distance statistics are also analysed in terms of daily driven distance distribution, total annual distance and shares between different driving conditions (urban, rural and motorway). PHEVs charge sustaining and pure electric driving consumption are presented together with details on the charging events. Real-world hints on the utility factor concept are discussed. Our PHEVs corporate users consume more compared to private users because of lower charging applied. The findings highlight how OBFCM provides accurate real-world data, crucial for accelerating greenhouse gas emissions reduction and energy consumption improvements.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"335 ","pages":"Article 119816"},"PeriodicalIF":9.9,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143900104","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

In situ amorphous-adhesive interface facilitate ionic transport in protonic ceramic fuel cells 原位非晶黏附界面促进质子陶瓷燃料电池中的离子传输

IF 9.9 1区工程技术

Energy Conversion and Management Pub Date : 2025-04-30 DOI: 10.1016/j.enconman.2025.119851

Wenjuan Zhao , Jun Wang , Bin Lin , Enyi Hu , Penghui Yao , Faze Wang , Bin Zhu , Peter Lund , Muhammad Imran Asghar

{"title":"In situ amorphous-adhesive interface facilitate ionic transport in protonic ceramic fuel cells","authors":"Wenjuan Zhao , Jun Wang , Bin Lin , Enyi Hu , Penghui Yao , Faze Wang , Bin Zhu , Peter Lund , Muhammad Imran Asghar","doi":"10.1016/j.enconman.2025.119851","DOIUrl":"10.1016/j.enconman.2025.119851","url":null,"abstract":"<div><div>Protonic ceramic fuel cells (PCFCs) represent a promising carbon–neutral power-generation technology, leveraging the high proton conductivity demonstrated in stable yttrium-doped barium zirconate (BZY) electrolyte, but their practical application is hindered by poor sinterability and diminished overall proton conductivity caused by resistive grain boundaries. In this work, we present a sintering-free superfast-protonic ceramic fuel cell (S-PCFC) based on BZY electrolyte enabled by an amorphous-adhesive-enabled interface. S-PCFC is fabricated in-situ via a facile and scalable dry-press process, circumventing the need for conventional high-temperature sintering in air. A molten mixture of LiOH and Li<sub>2</sub>CO<sub>3</sub> is in situ embedded during electrochemical operation, forming an amorphous-adhesive interface within grain boundaries. This approach achieves a record-high power output of 866 mW·cm<sup>−2</sup> and the highest reported proton conductivity for BZY electrolytes (0.257 S·cm<sup>−1</sup> at 520 ℃). Density functional theory (DFT) calculations reveal the reduced migration energy barriers for proton transport, demonstrating that the in-situ formed amorphous-adhesive interface facilitates ultrafast proton conduction within the sintering-free BZY electrolyte. This S-PCFC unlocks new possibilities for superfast-protonic ceramics.</div></div>","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"334 ","pages":"Article 119851"},"PeriodicalIF":9.9,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887511","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

Multi-storage, multi-energy, and multi-policy optimization for hybrid green and grey hydrogen production: A regional study in China 绿色和灰色混合制氢的多存储、多能源和多政策优化：中国区域研究

IF 9.9 1区工程技术

Energy Conversion and Management Pub Date : 2025-04-30 DOI: 10.1016/j.enconman.2025.119784

Zishan Yin , Xiyun Tang , Xi Li

引用次数: 0

Withdrawal notice to “Development of a new catalytic reactor for CO2 to CO conversion” [Energy Convers. Manag. 333 (2025) 119786] 关于“发展二氧化碳转化为一氧化碳的新型催化反应器”[能源转换器]的撤回通知。管理。333 (2025)119786]

IF 9.9 1区工程技术

Energy Conversion and Management Pub Date : 2025-04-29 DOI: 10.1016/j.enconman.2025.119866

Andrea Manzo, Marco Milanese, Arturo de Risi, Gianpiero Colangelo

引用次数: 0