International Journal of Hydrogen Energy最新文献_第5页

Circular supply chain design for biohydrogen recovery from perishable agri-food waste 从易腐农业食品垃圾中回收生物氢的循环供应链设计

IF 8.3 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2026-03-13 Epub Date: 2026-02-13 DOI: 10.1016/j.ijhydene.2026.153731

Moein Khazaei , Maryam Mehrparvar , Kannan Govindan , Saeid Barazandeh , Amirhossein Mostofi , Zahra Mohemmi

The increasing interdependencies between water, energy, and food systems highlight the urgency of integrated solutions for managing environmental and resource challenges. This study proposes a sustainable logistics framework for converting agri-food waste into biohydrogen, drawing on the Water-Energy-Food (WEF) Nexus to guide strategic planning. Focusing on Razavi Khorasan, Iran, a drought-prone region with substantial upstream food losses and declining groundwater reserves, the research explores how circular supply chain can support both waste reduction and clean energy generation. The proposed system is structured around a closed-loop supply chain that incorporates both forward delivery and reverse logistics to collect perishable food waste and redirect it for biohydrogen production. This approach prioritizes the recovery of high-water-footprint items such as fruits, vegetables, and cereals, thereby mitigating the loss of embedded resources. A scenario-based assessment of vehicle types and environmental policies highlights the operational and environmental trade-offs of different logistics strategies. The findings suggest that low-capital interventions, such as smart routing and shared logistics, can deliver significant environmental benefits without the infrastructure barriers of full fleet electrification. Ultimately, the framework supports resilient, low-carbon pathways for agri-food systems in water-stressed regions, contributing to circular economy goals and Sustainable Development Goals (SDGs) related to climate action, food security, and clean energy access.

水、能源和粮食系统之间日益增长的相互依赖关系凸显了综合解决方案管理环境和资源挑战的紧迫性。本研究提出了一个将农业食品废弃物转化为生物氢的可持续物流框架，利用水-能源-食品（WEF）关系来指导战略规划。该研究将重点放在伊朗的拉扎维呼罗珊（Razavi Khorasan），这是一个干旱易发地区，上游粮食损失严重，地下水储量不断减少，研究探讨了循环供应链如何支持减少废物和清洁能源生产。拟议的系统围绕一个闭环供应链构建，该供应链包括正向配送和反向物流，以收集易腐食物垃圾，并将其重新定向用于生物氢生产。这种方法优先回收高水足迹的物品，如水果、蔬菜和谷物，从而减少内在资源的损失。基于场景的车辆类型和环境政策评估强调了不同物流战略的运营和环境权衡。研究结果表明，低资本干预措施，如智能路线和共享物流，可以在没有车队全面电气化的基础设施障碍的情况下带来显著的环境效益。最终，该框架支持水资源紧张地区的农业粮食系统走有韧性的低碳道路，为实现与气候行动、粮食安全和清洁能源获取相关的循环经济目标和可持续发展目标做出贡献。

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引用次数: 0

A modelling study on how AC:DC mode-switching can improve co-electrolysis operations on solid oxide cells 交流：直流模式切换如何改善固体氧化物电池共电解操作的建模研究

IF 8.3 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2026-03-13 Epub Date: 2026-02-11 DOI: 10.1016/j.ijhydene.2026.153850

Federico Mattera , Thomas Erik Lyck Smitshuysen , Ana García Romañach , Mads Pagh Nielsen , Vincenzo Liso , Omid Babaie Rizvandi , Robert Braun , Søren Højgaard Jensen

The production of syngas by co-electrolysis in solid oxide cells (SOCs) is limited at industrial scale by the operational difficulties of high thermoneutral potential and the shortened lifetime due to carbon deposition. This work analyses the effects of pulsed electrical current, named “AC:DC operation”, on a single SOC during co-electrolysis. The model is built in Python, and it represents an adiabatic dynamic simulation over a two-dimensional domain. The model parameters related to mass transport and overpotentials were fitted from experimental tests. It was shown that the AC:DC operation can be tuned to homogenize the temperature across the cell, reducing the temperature decrease from inlet to outlet (<100°C) while operating at average voltage values below the nominal thermoneutral potential. In comparison to the regular DC mode, such AC:DC operation could be used to raise the outlet temperature of the cell up to +76°C, with a consequent increase in carbon dioxide conversion from 64% to 73%, when the nominal reactant conversion was fixed at 80%. Moreover, it was also shown that increasing the current density increases the risk of carbon deposition when operating in DC, entering the carbon formation region at −0.4 A/cm². We demonstrate via model-predictive simulations that the use of AC:DC, thanks to the increase in the cell outlet temperature, moves the operation out of the carbon formation threshold zone, allowing for coke-free operation in an expanded current density regime between −0.4 and −0.6 A/cm². These results provide useful insight into experimental co-electrolysis and advancing the commercial pathway of the technology.

在固体氧化物电池（soc）中通过共电解生产合成气，由于高热中性电位的操作困难和碳沉积导致的寿命缩短，在工业规模上受到限制。本工作分析了共电解过程中脉冲电流（称为“交直流操作”）对单个SOC的影响。该模型是用Python构建的，它代表了二维域上的绝热动态模拟。根据实验结果拟合了与质量传递和过电位有关的模型参数。研究表明，在低于标称热中性电位的平均电压值下工作时，可以调整交直流操作以均匀化整个电池的温度，减少从进口到出口的温度下降（<100°C）。与常规的直流模式相比，这种交直流操作可以将电池的出口温度提高到+76°C，从而将二氧化碳转化率从64%提高到73%，而标称反应物转化率固定在80%。此外，研究还表明，增加电流密度会增加直流下积碳的风险，以−0.4 A/cm2的电流进入积碳区。我们通过模型预测模拟证明，由于电池出口温度的增加，使用AC:DC可以将操作移出碳形成阈值区域，从而在−0.4和−0.6 A/cm2之间的扩展电流密度范围内实现无焦操作。这些结果为实验共电解和推进该技术的商业化途径提供了有用的见解。

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引用次数: 0

Oxidation-state-dependent mechanisms of hydrogen-rich gas formation from furfural in supercritical water over Fe-based catalysts 超临界水中糠醛在铁基催化剂上生成富氢气体的氧化态依赖机理

IF 8.3 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2026-03-13 Epub Date: 2026-02-12 DOI: 10.1016/j.ijhydene.2026.153858

Yutong Wang , Le Chang , Junhao Guo , Xi Chen , Guozhu Liu

While iron-based catalysts are pivotal for hydrogen-rich gas production from supercritical water gasification (SCWG) of biomass, the mechanistic influence of their oxidation states remains poorly understood. In this study, reactive molecular dynamics (RMD) simulations are employed to investigate the SCWG of furfural, a representative oxygenated biomass intermediate, over Fe and Fe₂O₃ nanoparticles. Results show that both catalysts markedly accelerate decomposition through dehydrogenation and ring-opening reactions. Fe induces a strongly reductive environment favoring H₂ and CH₄ formation, whereas Fe₂O₃ promotes oxidation via lattice oxygen participation, yielding CO and CO₂. Kinetic analysis reveals that apparent activation energy decreases from 130.06 kJ/mol (non-catalytic) to 62.72 kJ/mol (Fe) and 79.39 kJ/mol (Fe₂O₃). Complementary life cycle assessment (LCA) demonstrates that Fe-catalyzed SCWG achieves substantial greenhouse gas mitigation through product substitution. These atomic-scale and system-level insights provide a mechanistic basis for designing efficient iron-based catalysts for sustainable hydrogen production.

虽然铁基催化剂是生物质超临界水气化（SCWG）生产富氢气体的关键，但其氧化态的机制影响尚不清楚。在这项研究中，反应分子动力学（RMD）模拟研究了糠醛（一种代表性的含氧生物质中间体）在Fe和Fe2O3纳米颗粒上的SCWG。结果表明，两种催化剂均能通过脱氢和开环反应显著加速分解。铁诱导了有利于H2和CH4生成的强还原环境，而Fe2O3通过晶格氧参与促进氧化，生成CO和CO2。动力学分析表明，表观活化能从130.06 kJ/mol（非催化）降低到62.72 kJ/mol （Fe）和79.39 kJ/mol （Fe2O3）。互补生命周期评估（LCA）表明，通过产品替代，铁催化的SCWG实现了大量的温室气体减排。这些原子级和系统级的见解为设计高效的铁基催化剂以实现可持续制氢提供了机制基础。

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引用次数: 0

Sustainable hydrogen storage capability of metal hydrides A2BAlH6 (A = Na, K, Rb and B = Ti, Fe) investigated through the evaluation of physical characteristics using DFT and AIMD simulation 利用DFT和AIMD模拟对金属氢化物A2BAlH6 （A = Na， K， Rb和B = Ti, Fe）的物理特性进行评价，研究其可持续储氢能力

IF 8.3 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2026-03-13 Epub Date: 2026-02-12 DOI: 10.1016/j.ijhydene.2026.153958

Arslan Ali , M. Muddassir , S.S.A. Gillani , M. Rafique , Abdullah K. Alanazi , M. Shakil

Hydrogen stands out as a promising alternative to fossil fuels due to its abundance, cleanliness, and non-toxic nature. Nonetheless, developing efficient storage methods poses a major hurdle. This work investigates the properties of novel metal hydrides (MHs) A₂BAlH₆ (A = Na, K, Rb and BTi, Fe) using density functional theory (DFT) and ab initio molecular dynamics (AIMD) simulations. The calculations are performed to calculate structural, electronic, elastic, mechanical, thermodynamic, optical properties and hydrogen storage capacity evaluation. The Investigated MHs exhibit thermodynamic stability, confirmed by negative formation energies, and dynamic stability verified by phonon dispersion analysis and AIMD simulations. Electronic band structures revealed their metallic character, while optical characteristics showed highest absorption and conductivity in visible and ultraviolet (UV) range. The materials are found to be mechanically stable as evaluated through the elastic constants which have indicated anisotropic and brittle behavior. The gravimetric hydrogen storage capacity (Gwt%) of these MHs i.e. A₂BAlH₆ (A = Na, K, Rb and BTi, Fe), is calculated as 4.77, 3.80, 2.40, 4.49, 3.62 and 2.33 Gwt% with their desorption temperatures as 981 K, 751 K, 490 K, 819 K, 590 K and 544 K, respectively. These findings suggest that the investigated MHs are promising candidates for hydrogen storage.

氢因其丰富、清洁和无毒的特性而成为化石燃料的一个很有前途的替代品。尽管如此，开发高效的存储方法仍是一大障碍。本文利用密度泛函理论（DFT）和从头算分子动力学（AIMD）模拟研究了新型金属氢化物（MHs） A2BAlH6 （A = Na， K， Rb和BTi， Fe）的性质。计算执行计算结构，电子，弹性，力学，热力学，光学性质和储氢能力的评估。所研究的MHs表现出热力学稳定性，这得到了负地层能的证实，并且通过声子色散分析和AIMD模拟证实了其动力学稳定性。电子能带结构显示其金属特性，光学特性显示其在可见光和紫外波段具有最高的吸收和电导率。通过弹性常数评估材料的力学稳定性，表明材料具有各向异性和脆性行为。A2BAlH6 （A = Na， K， Rb和BTi， Fe）的重量储氢量（Gwt%）分别为4.77,3.80,2.40,4.49,3.62和2.33 Gwt%，其解吸温度分别为981 K， 751 K, 490 K, 819 K， 590 K和544 K。这些发现表明，所研究的mh是储氢的有希望的候选者。

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引用次数: 0

P-doped activated carbons for methane thermocatalytic decomposition p掺杂活性炭用于甲烷热催化分解

IF 8.3 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2026-03-13 Epub Date: 2026-02-13 DOI: 10.1016/j.ijhydene.2026.153841

Valentina Balloi , Edgar S. Durán-Uribe , A. Sepúlveda-Escribano , Manuel Antonio Diaz-Perez , Juan Carlos Serrano-Ruiz

引用次数: 0

Density functional theory insights into the structure, electronic and mechanical properties, thermodynamics, and diffusion of high-entropy alloys for hydrogen storage: A review 密度泛函理论对高熵储氢合金结构、电子和机械性能、热力学和扩散的见解：综述

IF 8.3 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2026-03-13 Epub Date: 2026-02-13 DOI: 10.1016/j.ijhydene.2026.153928

Nihad Omer Hassan , Afaf Ghais , Muhammad H.M. Ahmed , Mahmoud Adam , Razan Ahmed , Amel Abdelatti , D.E.P. Klenam , M.O. Bodunrin , Abdalrhaman Koko

This review highlights the application of first principles in studying hydrogen interactions within HEAs. It explores key aspects, including electronic, mechanical stability, thermodynamics, and diffusion pathways. Most research uses SQS to simulate chemical disorder, which is paired with GGA-PBE exchange-correlation functionals and PAW pseudopotentials to ensure accurate energetic and structural predictions. Electronically, DFT descriptors such as DOS/PDOS, COHP/ICOHP, bond order, and Mulliken charges have demonstrated that hydrogen stabilization is controlled by localized metal-hydrogen bonding, charge transfer, and element-specific d-1s hybridization, all of which influence interstitial site preference and hydride stability. Mechanically, DFT-derived elastic moduli (B, G, E), Pugh's ratio, and dislocation energy factors show that hydrogen can strengthen or soften HEAs, depending on concentration, phase, and local lattice distortion, influence powder hydride decrepitation and cycle durability. Thermodynamically, hydrogen binding energy emerges as the critical descriptor, requiring an ideal intermediate binding strength for reversible absorption and desorption. DFT exhibits heterogeneous hydrogen transport regulated by competing lattice distortion (trapping) and lattice expansion (enhanced pathways), resulting in diffusion composition and phase dependence. DFT's strengths include unmatched atomistic insight, but it is limited by exchange-correlation approximations, neglect of short-range order, incomplete entropy/zero-point effects, static 0 K models, and high computing cost. Future advancement will be made by combining DFT and machine learning for high-throughput screening in rational HEA design.

本文综述了第一性原理在HEAs内氢相互作用研究中的应用。它探讨了关键方面，包括电子，机械稳定性，热力学和扩散途径。大多数研究使用SQS来模拟化学紊乱，并与GGA-PBE交换相关功能和PAW伪势配对，以确保准确的能量和结构预测。电子方面，DFT描述符（如DOS/PDOS、COHP/ICOHP、键序和Mulliken电荷）表明，氢的稳定性是由局部金属-氢键、电荷转移和元素特异性d-1s杂化控制的，所有这些都会影响间隙位偏好和氢化物的稳定性。力学上，dft导出的弹性模量（B， G， E）、Pugh’s比和位错能因子表明，氢可以根据浓度、相和局部晶格畸变增强或软化HEAs，从而影响粉末氢化物的磨损和循环耐久性。热力学上，氢结合能作为关键描述符出现，需要一个理想的中间结合强度来实现可逆的吸收和解吸。DFT表现出由竞争性晶格畸变（捕获）和晶格膨胀（增强路径）调节的非均相氢输运，导致扩散组成和相依赖。DFT的优势包括无与伦比的原子洞察力，但它受到交换相关近似、忽略短程顺序、不完全熵/零点效应、静态0 K模型和高计算成本的限制。将DFT和机器学习结合起来，在合理的HEA设计中进行高通量筛选，将是未来的发展方向。

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引用次数: 0

The effect of oxygen-water separation transport porous transport layer on oxygen management in proton exchange membrane water electrolysis 氧-水分离输运多孔输运层对质子交换膜电解中氧管理的影响

IF 8.3 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2026-03-13 Epub Date: 2026-02-13 DOI: 10.1016/j.ijhydene.2026.153815

Qing Li , Yuting He , Liangming Pan , Yanan Zou , Luteng Zhang , Wan Sun , Zaiyong Ma , Longxiang Zhu , Qiang Lian , Simiao Tang

Proton exchange membrane water electrolysis has emerged as a promising technology for hydrogen production from renewable energy sources. However, effective bubble management within the porous transport layer (PTL) remains a critical challenge that impedes system efficiency. Herein, the oxygen transport mechanism and governing factors in a novel PTL design featuring oxygen-water separation transport capability (PTL-ST) are investigated using the lattice Boltzmann method. The PTL-ST regulates oxygen transport pathways and mitigates oxygen accumulation on the catalyst-coated membrane (CCM) surface, which results from inherent structural defects in conventional PTLs. Spearman correlation analysis reveals a strong positive correlation between oxygen saturation on the CCM surface and breakthrough pressure. The sample with four gas channels occupying 10% of the area demonstrates optimal performance, exhibiting an oxygen saturation that is 71.2% of that in conventional PTLs. These findings contribute to the fundamental understanding of bubble dynamics in PTLs and the development of next-generation electrolysis systems.

质子交换膜电解是一种很有前途的可再生能源制氢技术。然而，多孔传输层（PTL）内的有效气泡管理仍然是阻碍系统效率的关键挑战。本文采用晶格玻尔兹曼方法研究了具有氧-水分离输运能力的新型PTL设计中的氧输运机制和控制因素。PTL-ST调节氧运输途径，减轻氧在催化剂包覆膜（CCM）表面的积累，这是由传统ptl固有的结构缺陷造成的。Spearman相关分析表明，CCM表面氧饱和度与突破压力呈正相关。当4个气通道占据10%的面积时，样品表现出最佳的性能，其氧饱和度为常规ptl的71.2%。这些发现有助于对ptl中气泡动力学的基本理解和下一代电解系统的开发。

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引用次数: 0

A trajectory-driven approach for intercity heavy-duty truck hydrogen refueling station location 基于轨迹驱动的城际重型卡车加氢站选址方法

IF 8.3 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2026-03-13 Epub Date: 2026-02-13 DOI: 10.1016/j.ijhydene.2026.153872

Xuezhu Cui , Jiahao Liang , Feng Gao , Quan Mu , Shaoying Li

Hydrogen-fueled heavy-duty trucks (HDTs) hold great decarbonization potential but suffer from insufficient refueling infrastructure. This study integrates 173,481 real-world HDT trajectories into the multi-capacitated NMC-FRLM model, enabling one-step joint optimization of siting and capacity via endogenous cost weights (3.72:1.93:1 for Class A [4000 kg/d], B [2000 kg/d], C [1000 kg/d]). Validated in the Pearl River Delta across six penetration scenarios (0.065%-1.5% hydrogen HDT share), the model clusters 774,556 refueling strategies into 199 corridors and selects 4-44 HRSs from 398 candidates. It achieves 85-100% utilization (Class A: 99.55%), meeting 7.9-176 t/d hydrogen demand across scenarios. Cost-weight sensitivity analysis shows small HRSs should not be prioritized; large/medium HRS deployment follows threshold rules: Class A for core corridors when A/B cost ratio >2:1, and B for suburban/secondary corridors when <2:1. Outperforming OD-based methods, this approach provides targeted policy support for hydrogen HDT transition.

氢燃料重型卡车（HDTs）具有巨大的脱碳潜力，但受到加氢基础设施不足的困扰。该研究将173481条真实HDT轨迹整合到多容量NMC-FRLM模型中，通过内生成本权重（A类[4000 kg/d]、B类[2000 kg/d]、C类[1000 kg/d]的3.72:1.93:1）实现了选址和容量的一步联合优化。该模型在珠江三角洲的6个渗透场景（氢气HDT份额为0.065%-1.5%）中进行了验证，将774,556种加油策略聚类到199个走廊中，并从398个候选方案中选择了4-44种加油策略。它达到85-100%的利用率（A级：99.55%），满足7.9-176吨/天的氢需求。成本-权重敏感性分析表明，不应优先考虑小的hrs；大中型HRS部署遵循阈值规则：当A/B成本比>；2:1时，核心走廊为A类；当<；2:1时，郊区/次要走廊为B类。该方法优于基于od的方法，为氢HDT过渡提供了有针对性的政策支持。

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引用次数: 0

An integrated framework for mapping barriers and strategies in green hydrogen deployment 绘制绿色氢部署障碍和战略的综合框架

IF 8.3 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2026-03-13 Epub Date: 2026-02-13 DOI: 10.1016/j.ijhydene.2026.153935

Ertugrul Ayyildiz , Busra Kesici , Melike Erdogan , Melike Cari , Nezir Aydin

Green hydrogen is a pivotal pathway for achieving decarbonization across power production, industry processes, and transportation sectors. However, few studies simultaneously map the causal structure of adoption barriers and prioritize actionable strategies under interval-valued fuzzy uncertainty. This study questions which barriers are the key drivers of the system and which strategies provide the best compromise to accelerate deployment. We apply Interval-Valued Intuitionistic Fuzzy Decision-Making Trial and Evaluation Laboratory (IVIF-DEMATEL) to quantify interrelationships and weights for nine interdependent adoption barriers, and Interval-Valued Intuitionistic Fuzzy VIseKriterijumska Optimizacija I Kompromisno Resenje (IVIF-VIKOR) to rank six competing strategy alternatives against a multi-criteria set derived from the barrier landscape. The causal analysis identifies High Production Cost, Regulatory Uncertainty, and Technology Readiness as the three strongest driving barriers, whereas Lack of Infrastructure attains the highest overall prominence despite acting as an effect factor. On the strategy side, the compromise solution set consists of Technology Maturation and System Integration as the first-ranked option, followed by Regulatory Clarity, Certification, and One-Stop Permitting, indicating that technological readiness and regulatory certainty are the most effective leverage points for accelerating deployment. The study delivers an integrated IVIF framework that links causal weighting to strategy choice and offers a prioritized roadmap for policy and investment.

绿色氢是实现电力生产、工业过程和运输部门脱碳的关键途径。然而，很少有研究在区间值模糊不确定性下同时绘制采用障碍的因果结构并优先考虑可操作策略。这项研究质疑哪些障碍是系统的关键驱动因素，哪些策略提供了加速部署的最佳折衷方案。我们应用区间值直觉模糊决策试验和评估实验室（IVIF-DEMATEL）来量化9个相互依赖的采用障碍的相互关系和权重，并应用区间值直觉模糊VIseKriterijumska Optimizacija I Kompromisno Resenje （IVIF-VIKOR）来根据来自障碍景观的多标准集对6个竞争策略方案进行排名。因果分析表明，高生产成本、监管不确定性和技术成熟度是三个最强大的驱动障碍，而基础设施缺乏尽管是一个影响因素，但总体上最为突出。在战略方面，折衷解决方案集包括技术成熟和系统集成作为排名第一的选项，其次是监管清晰度，认证和一站式许可，这表明技术准备和监管确定性是加速部署的最有效的杠杆点。该研究提供了一个综合的体外受精框架，将因果权重与战略选择联系起来，并为政策和投资提供了优先路线图。

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引用次数: 0

A cryogen-free calorimeter for thermal performance measurement of multilayer insulation materials at liquid hydrogen temperatures 一种用于多层绝缘材料在液氢温度下热性能测量的无冷量热计

IF 8.3 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy

Pub Date : 2026-03-13 Epub Date: 2026-02-13 DOI: 10.1016/j.ijhydene.2026.153974

Yunfei Gao , Haoren Wang , Bo Wang , Zekai Zhu , Haoxiang Guo , Rui Yang , Zitao Yu , Zhihua Gan

Accurate thermal performance measurement of multilayer insulation (MLI) materials is essential for the safe storage, transportation, and operation of liquid hydrogen (LH₂). The high cost and safety risks of LH₂ pose a significant challenge to measuring MLI performance at LH₂ temperatures. Given this, a cryogen-free calorimeter (CFC) for MLI is developed in this study. The CFC applies three Gifford-McMahon (G–M) cryocoolers to control the cold boundary temperature of the MLI at the normal boiling point of LH₂ (20.3 K). During the test, the MLI is wrapped on the test chamber, and a thermal support structure connects the cryocoolers and the test chamber. The heat leakage through the MLI can be obtained by measuring the heat conduction from the cold end to the warm end of the support structure. A comparative experimental study of apparent thermal conductivity testing on the same MLI is carried out using the CFC and the boil-off calorimeter at liquid nitrogen temperatures. A deviation of 5.3% is observed in the tested data between the two calorimeters, proving the validity of the CFC. Additionally, two MLI samples consisting of aluminum foil and fiberglass with a total layer of 50 and 60 layers at LH₂ temperatures are tested based on the CFC. The tested apparent thermal conductivities are 9.92 × 10⁻⁵ W/(m·K) for the 50-layer MLI and 1.45 × 10⁻⁴ W/(m·K) for the 60-layer MLI, respectively, providing data for the design and optimization of thermal insulation for LH₂ applications.

多层绝缘（MLI）材料的准确热性能测量对于液氢（LH2）的安全储存、运输和运行至关重要。LH2的高成本和安全风险给LH2温度下MLI性能的测量带来了重大挑战。鉴于此，本研究开发了一种用于MLI的无冷量热计（CFC）。CFC采用3台吉福德-麦克马洪（Gifford-McMahon, G-M）制冷机，将MLI的冷界温度控制在LH2的正常沸点（20.3 K）。在测试过程中，MLI被包裹在测试箱上，一个热支撑结构将冷冻冷却器和测试箱连接起来。通过测量支撑结构冷端到热端的热传导，可以得到MLI的漏热量。在液氮温度下，利用CFC和蒸发量热计对同一MLI进行了表观导热系数测试的对比实验研究。在两个量热计之间的测试数据中观察到5.3%的偏差，证明了CFC的有效性。此外，在LH2温度下，基于CFC测试了两种由铝箔和玻璃纤维组成的MLI样品，总层数分别为50层和60层。50层MLI的表观导热系数为9.92 × 10−5 W/(m·K)， 60层MLI的表观导热系数为1.45 × 10−4 W/(m·K)，为LH2应用的隔热设计和优化提供了数据。

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引用次数: 0