Frontiers in Energy最新文献_第2页

Three-dimensional numerical simulation of melting characteristics of phase change materials embedded with various TPMS skeletons 嵌入不同TPMS骨架的相变材料熔化特性的三维数值模拟

IF 3.1 4区工程技术

Frontiers in Energy Pub Date : 2024-12-10 DOI: 10.1007/s11708-024-0967-z

Pengzhen Zhu, Baoming Chen, Liyan Sui, Hongchen Li, Kun Li, Yu Jian

{"title":"Three-dimensional numerical simulation of melting characteristics of phase change materials embedded with various TPMS skeletons","authors":"Pengzhen Zhu, Baoming Chen, Liyan Sui, Hongchen Li, Kun Li, Yu Jian","doi":"10.1007/s11708-024-0967-z","DOIUrl":"10.1007/s11708-024-0967-z","url":null,"abstract":"<div><p>Phase change energy storage technology has great potential for enhancing the efficient conversion and storage of energy. While triply periodic minimal surface (TPMS) structures have shown promise in improving heat transfer, research on their application in phase change heat transfer remains limited. This paper presents numerical simulations of composite phase change materials (PCMs) featuring TPMS skeletons, specifically gyroid, diamond, primitive, and I-graph and wrapped package-graph (I-WP) utilizing the lattice Boltzmann method (LBM). A comparative analysis of the effects of four TPMS skeletons on enhancing the phase change process reveals that the PCM containing the gyroid skeleton melts the fastest, with a complete melting time of 24.1% shorter than that of the PCM containing the I-WP skeleton. The PCM containing the gyroid skeleton is further simulated to explore the effects of the Rayleigh (<i>Ra</i>) number, Prandtl (<i>Pr</i>) number, and Stefan (<i>Ste</i>) number on the melting characteristics. Notably, the complete melting time is reduced by 60.44% when <i>Ra</i> is increased to 10<sup>6</sup> compared to the case with <i>Ra</i> at 10<sup>4</sup>. Increasing the <i>Pr</i> number accelerates the migration of the mushy zone, resulting in fast melting. Conversely, the convective heat transfer effect from the heating surface decreases as the <i>Ste</i> number increases. The temperature differences caused by the local thermal non-equilibrium (LTNE) effect over time are significant and complex, with peaks becoming more pronounced nearer the heating surface. This study intends to provide theoretical support for the further development of TPMS skeletons in enhancing the phase change process.</p></div>","PeriodicalId":570,"journal":{"name":"Frontiers in Energy","volume":"19 2","pages":"157 - 174"},"PeriodicalIF":3.1,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143925536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Performance enhancement, economic analysis, and futuristic insight of single-well medium-deep and deep geothermal systems 单井中深层和深层地热系统的性能提升、经济分析和未来展望

IF 3.1 4区工程技术

Frontiers in Energy Pub Date : 2024-11-30 DOI: 10.1007/s11708-024-0971-3

Ang Li, R. S. Anand, Wenbo Huang, Juanwen Chen, Zhibin Li, Jian Guo, Qingshan Ma, Fangming Jiang

{"title":"Performance enhancement, economic analysis, and futuristic insight of single-well medium-deep and deep geothermal systems","authors":"Ang Li, R. S. Anand, Wenbo Huang, Juanwen Chen, Zhibin Li, Jian Guo, Qingshan Ma, Fangming Jiang","doi":"10.1007/s11708-024-0971-3","DOIUrl":"10.1007/s11708-024-0971-3","url":null,"abstract":"<div><p>Geothermal energy is clean and renewable, derived from the heat stored within accessible depths of the Earth’s crust. The adoption of a single-well system for medium-deep and deep geothermal energy extraction has attracted significant interest from the scientific and industrial communities because it effectively circumvents issues such as downhole inter-well connections and induced seismicity. However, the low heat transfer capacity in geothermal formations limits the heat extraction performance of single-well systems and hinders their commercial deployment. This review covers various enhancement concepts for optimizing the heat transfer within single-well systems, emphasizing critical parameters such as heat transfer area, heat transfer coefficient, and temperature difference. Additionally, it presents the thermo-economic evaluation of different configurations of single-well borehole heat exchangers and superlong gravity heat pipes (SLGHPs). The SLHGP, utilizing phase-change heat transfer, is recognized as a highly effective and continuously productive technology, capable of extracting over 1 MW of heat. Its pumpless operation and ease of installation in abandoned wells make it cost-effective, offering a promising economic advantage over traditional geothermal systems. It also highlights the challenges and potential research opportunities that can help identify gaps in research to enhance the performance of single-well geothermal systems.</p></div>","PeriodicalId":570,"journal":{"name":"Frontiers in Energy","volume":"19 1","pages":"33 - 58"},"PeriodicalIF":3.1,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143655415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Comprehensive assessment and optimization of a hybrid cogeneration system based on compressed air energy storage with high-temperature thermal energy storage 压缩空气储能与高温蓄热混合热电联产系统综合评价与优化

IF 3.1 4区工程技术

Frontiers in Energy Pub Date : 2024-11-30 DOI: 10.1007/s11708-024-0972-2

Ruifeng Cao, Weiqiang Li, Hexi Ni, Cuixiong Kuang, Yutong Liang, Ziheng Fu

{"title":"Comprehensive assessment and optimization of a hybrid cogeneration system based on compressed air energy storage with high-temperature thermal energy storage","authors":"Ruifeng Cao, Weiqiang Li, Hexi Ni, Cuixiong Kuang, Yutong Liang, Ziheng Fu","doi":"10.1007/s11708-024-0972-2","DOIUrl":"10.1007/s11708-024-0972-2","url":null,"abstract":"<div><p>Compressed air energy storage (CAES) is an effective technology for mitigating the fluctuations associated with renewable energy sources. In this work, a hybrid cogeneration energy system that integrates CAES with high-temperature thermal energy storage and a supercritical CO<sub>2</sub> Brayton cycle is proposed for enhancing the overall system performance. This proposal emphasizes system cost-effectiveness, eco-friendliness, and adaptability. Comprehensive analyses, including thermodynamic, exergoeconomic, economic, and sensitivity evaluations, are conducted to assess the viability of the system. The findings indicate that, under design conditions, the system achieves an energy storage density, a round-trip efficiency, an exergy efficiency, a unit product cost, and a dynamic payback period of 5.49 kWh/m<sup>3</sup>, 58.39%, 61.85%, 0.1421 $/kWh, and 4.81 years, respectively. The high-temperature thermal energy storage unit, intercoolers, and aftercooler show potential for optimization due to their suboptimal exergoeconomic performance. Sensitivity evaluation indicates that the operational effectiveness of the system is highly sensitive to the maximum and minimum air storage pressures, the outlet temperature of the high-temperature thermal energy storage unit, and the isentropic efficiencies of both compressors and turbines. Ultimately, the system is optimized for maximum exergy efficiency and minimum dynamic payback period. These findings demonstrate the significant potential of this system and provide valuable insights for its design and optimization.</p></div>","PeriodicalId":570,"journal":{"name":"Frontiers in Energy","volume":"19 2","pages":"175 - 192"},"PeriodicalIF":3.1,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143925501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Climate change and innovative paths to a more sustainable future 气候变化和通往更可持续未来的创新途径

IF 3.1 4区工程技术

Frontiers in Energy Pub Date : 2024-11-10 DOI: 10.1007/s11708-024-0965-1

Steven Chu, Qi Wang

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Glow-in-the-dark: Exploring the opportunities and challenges of bioluminescent plankton as a natural light source 在黑暗中发光：探索生物发光浮游生物作为自然光源的机遇和挑战

IF 3.1 4区工程技术

Frontiers in Energy Pub Date : 2024-11-10 DOI: 10.1007/s11708-024-0966-0

Siti Hamisah Tapsir, Siew Moi Phang, Nor Aieni Mokhtar, Swee Sen Teo, Lai Huat Lim, Kah Hou Teng, Swee Pin Yeap

{"title":"Glow-in-the-dark: Exploring the opportunities and challenges of bioluminescent plankton as a natural light source","authors":"Siti Hamisah Tapsir, Siew Moi Phang, Nor Aieni Mokhtar, Swee Sen Teo, Lai Huat Lim, Kah Hou Teng, Swee Pin Yeap","doi":"10.1007/s11708-024-0966-0","DOIUrl":"10.1007/s11708-024-0966-0","url":null,"abstract":"<div><p>Bioluminescent plankton are marine organisms capable of emitting visible light through chemical reactions in their bodies. This unique biochemical trait is attributed to a luciferin-luciferase reaction, which produces a striking blue light. This fascinating phenomenon, often referred to as the “blue tears” effect, has become a major attraction for tourist attractions in many countries. Since their discovery, most investigations related to these marine organisms have primarily focused on the fields of biology, ecology, oceanography, and microbiology. However, there has been limited to almost no study of their potential applications in the area of energy or lighting. This paper provides viewpoints on the opportunities for using these marine organisms and their light-emitting characteristics as an energy-efficient and environmentally friendly lighting solution, rather than just as a tourist attraction. Additionally, it addresses the challenges associated with sustaining the growth of bioluminescent plankton collected from the marine environment, the importance of establishing suitable protocols for in-house cultivation, challenges in stimulating the light-production at desired time, constraint imposed by the circadian rhythm, the toxicity of certain bioluminescent plankton, and the capacity of their luminous intensity.</p></div>","PeriodicalId":570,"journal":{"name":"Frontiers in Energy","volume":"18 6","pages":"730 - 734"},"PeriodicalIF":3.1,"publicationDate":"2024-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142912924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Analysis of heat transfer characteristics of a novel liquid CO2 energy storage system based on two-stage cold and heat storage 基于两级冷热储的新型液态CO2储能系统传热特性分析

IF 3.1 4区工程技术

Frontiers in Energy Pub Date : 2024-11-01 DOI: 10.1007/s11708-024-0963-3

Pingyang Zheng, Jiahao Hao, Zhentao Zhang, Junling Yang, Xiaoqiong Li, Yunkai Yue

{"title":"Analysis of heat transfer characteristics of a novel liquid CO2 energy storage system based on two-stage cold and heat storage","authors":"Pingyang Zheng, Jiahao Hao, Zhentao Zhang, Junling Yang, Xiaoqiong Li, Yunkai Yue","doi":"10.1007/s11708-024-0963-3","DOIUrl":"10.1007/s11708-024-0963-3","url":null,"abstract":"<div><p>As the installed capacity of renewable energy such as wind and solar power continues to increase, energy storage technology is becoming increasingly crucial. It could effectively balance power demand and supply, enhance allocation flexibility, and improve power quality. Among various energy storage technologies, liquid CO<sub>2</sub> energy storage (LCES) stands out as one of the most promising options due to its advantages such as high round-trip efficiency (RTE), high energy storage density (ESD), safety, stability, and longevity. Within the system, the cold and heat storage units play a critical role in determining the overall performance of the system and are particularly important among its various components. In this paper, a novel LCES system is proposed and the heat transfer characteristics are analyzed in detail. Then, the impact of key parameters on the liquefaction ratio and RTE is discussed. The results indicate that the RTE, ESD, and exergy efficiency of the system are 56.12%, 29.46 kWh/m<sup>3</sup>, and 93.73% under specified design conditions, respectively. During the gas–liquid phase change process of carbon dioxide or when it is in a supercritical state, the related heat transfer processes become more complex, leading to increased energy loss. The analysis of key parameters of the Linde-Hampson liquefaction unit reveals that as the liquefaction temperature decreases, both the liquefaction ratio and RTE increase. While the liquefaction pressure has a minimal impact on the liquefaction ratio, it significantly affects RTE, with an optimal liquefaction pressure identified.</p></div>","PeriodicalId":570,"journal":{"name":"Frontiers in Energy","volume":"19 2","pages":"193 - 204"},"PeriodicalIF":3.1,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143925499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Defect engineering in two-dimensional materials for photocatalysis: A mini-review of first-principles design 二维光催化材料中的缺陷工程：第一原理设计的综述

IF 3.1 4区工程技术

Frontiers in Energy Pub Date : 2024-10-30 DOI: 10.1007/s11708-024-0961-5

Yiqing Chen, Xiao-Yan Li, Pengfei Ou

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Core-membrane microstructured amine-modified mesoporous biochar templated via ZnCl2/KCl for CO2 capture ZnCl2/KCl模板化核膜微结构胺修饰介孔生物炭用于CO2捕集

IF 3.1 4区工程技术

Frontiers in Energy Pub Date : 2024-10-30 DOI: 10.1007/s11708-024-0964-2

Chen Zhang, Duoyong Zhang, Xinqi Zhang, Yongqiang Tian, Liwei Wang

{"title":"Core-membrane microstructured amine-modified mesoporous biochar templated via ZnCl2/KCl for CO2 capture","authors":"Chen Zhang, Duoyong Zhang, Xinqi Zhang, Yongqiang Tian, Liwei Wang","doi":"10.1007/s11708-024-0964-2","DOIUrl":"10.1007/s11708-024-0964-2","url":null,"abstract":"<div><p>Mesoporous biochar (MC) derived from biomass is synthesized using a dual-salt template method involving ZnCl<sub>2</sub> and KCl, followed by impregnation with polyethyleneimine (PEI) of varying average molecular weights under vacuum conditions to construct a core-membrane structure for enhancing carbon capture performance. The resulting MC exhibits a highly intricate network of micropores and abundant mesopores, along with defects in graphitic structures, effectively facilitating robust PEI loading. Among the PEI-modified samples, PEI-600@MC demonstrates the highest CO<sub>2</sub> sorption capacity, achieving approximately 3.35 mmol/g at 0.1 MPa and 70 °C, with an amine efficiency of 0.32 mmol CO<sub>2</sub>/mmol N. The introduction of amine functional groups in PEI significantly enhances the sorption capacity compared to bare MC. Additionally, PEI with lower average molecular weights exhibits a superior sorption performance at low pressures but shows a reduced thermal stability compared to higher molecular weight counterparts. The area of sorption hysteresis loops gradually decreases with increasing temperature and average molecular weight of PEI. The equilibrium sorption isotherms are accurately modeled by the Langmuir equation, revealing a maximum sorption capacity of approximately 3.53 mmol/g at 70 °C and saturation pressure. This work highlights the potential of dual-salts templated biomass-derived MC, modified with PEI, as an effective, widely available, and cost-efficient material for CO<sub>2</sub> capture.</p></div>","PeriodicalId":570,"journal":{"name":"Frontiers in Energy","volume":"18 6","pages":"863 - 874"},"PeriodicalIF":3.1,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142912748","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Performance analysis of a novel medium temperature compressed air energy storage system based on inverter-driven compressor pressure regulation 基于变频器驱动压缩机压力调节的新型中温压缩空气储能系统性能分析

IF 3.1 4区工程技术

Frontiers in Energy Pub Date : 2024-10-01 DOI: 10.1007/s11708-024-0921-0

Yanghai Li, Wanbing Xu, Ming Zhang, Chunlin Zhang, Tao Yang, Hongyu Ding, Lei Zhang

{"title":"Performance analysis of a novel medium temperature compressed air energy storage system based on inverter-driven compressor pressure regulation","authors":"Yanghai Li, Wanbing Xu, Ming Zhang, Chunlin Zhang, Tao Yang, Hongyu Ding, Lei Zhang","doi":"10.1007/s11708-024-0921-0","DOIUrl":"10.1007/s11708-024-0921-0","url":null,"abstract":"<div><p>In compressed air energy storage systems, throttle valves that are used to stabilize the air storage equipment pressure can cause significant exergy losses, which can be effectively improved by adopting inverter-driven technology. In this paper, a novel scheme for a compressed air energy storage system is proposed to realize pressure regulation by adopting an inverter-driven compressor. The system proposed and a reference system are evaluated through exergy analysis, dynamic characteristics analysis, and various other assessments. A comprehensive performance analysis is conducted based on key parameters such as thermal storage temperature, component isentropic efficiency, and designated discharge pressure. The results show that the novel system achieves a relative improvement of 3.64% in round-trip efficiency, demonstrating its capability to enhance efficiency without significantly increasing system complexity. Therefore, the system proposed offers a viable solution for optimizing compressed air energy storage systems.</p></div>","PeriodicalId":570,"journal":{"name":"Frontiers in Energy","volume":"19 2","pages":"144 - 156"},"PeriodicalIF":3.1,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139464464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Impact of bimetallic synergies on Mo-doping NiFeOOH: Insights into enhanced OER activity and reconstructed electronic structure 双金属协同作用对掺杂钼的 NiFeOOH 的影响：对增强 OER 活性和重建电子结构的启示

IF 3.1 4区工程技术

Frontiers in Energy Pub Date : 2024-09-01 DOI: 10.1007/s11708-024-0960-6

Jingkuo Qu, Yuchen Dong, Tuo Zhang, Chang Zhao, Liting Wei, Xiangjiu Guan

{"title":"Impact of bimetallic synergies on Mo-doping NiFeOOH: Insights into enhanced OER activity and reconstructed electronic structure","authors":"Jingkuo Qu, Yuchen Dong, Tuo Zhang, Chang Zhao, Liting Wei, Xiangjiu Guan","doi":"10.1007/s11708-024-0960-6","DOIUrl":"10.1007/s11708-024-0960-6","url":null,"abstract":"<div><p>NiFe (oxy)hydroxide (NiFeOOH) is recognized as a highly active non-precious metal catalyst in alkaline water electrolysis due to its exceptional catalytic properties. In this work, high valence molybdenum (Mo) is introduced to improve the electronic structure and enhance the electrical conductivity of NiFeOOH for oxygen evolution reaction (OER). The introduction of Mo results in a Mo-doped NiFeOOH catalyst with a significantly reduced overpotential of 205 mV at 10 mA/cm<sup>2</sup> and a Tafel slope of 31.7 mV/dec, enabling stable operation for up to 170 h. Both empirical experiment and theory simulations are employed to gain insight into the 3d-electron interactions between molybdenum and nickel (Ni), iron (Fe) in Mo-doped NiFeOOH. The results indicate that Mo-doping enhances the valence states of Ni and Fe, leading to a shift in the d-band center of the bimetallic active sites. This modification affects the transformation of Mo-doped NiFeOOH into the <i>γ</i>-NiFeOOH active phase. This potent combination lends credence to its potential suitability and utility in OER applications.</p></div>","PeriodicalId":570,"journal":{"name":"Frontiers in Energy","volume":"18 6","pages":"850 - 862"},"PeriodicalIF":3.1,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142175142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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