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Challenges in various thermal energy storage technologies

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Science Bulletin 2017年第4期62卷 231-233页

作者： Chenzhen Liu zhonghao rao School of Electrical and Power Engineering China University of Mining and Technology Xuzhou 221116 China

With the worsening of energy shortage and environmental pollution,energy storage has received much attention in the fields of renewable and sustainable energy in recent *** is widely known that energy storage is a technique storing excess energy in one form and converting it back to the same form or another when necessary[1].Especially energy storage occupies an important position in solar energy,wind energy and ocean ***,energy storage methods include mechanical energy storage,

关键词：热能储存技术可再生能源环境污染能源短缺能源领域储能

Enhancing lithium-sulfur battery performance with In_(2)O_(3)-In_(2)S_(3)@NSC heterostructures:Synergistic effects of double barrier and catalytic transformation

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Journal of Materials Science & Technology 2024年第2期169卷 105-114页

作者： Deqing He Chunyu Zhu Yutao Huo zhonghao rao School of Energy and Environmental Engineering Hebei University of TechnologyTianjin 300401China Hebei Key Laboratory of Thermal Science and Energy Clean Utilization Hebei University of TechnologyTianjin 300401China School of Low-carbon Energy and Power Engineering China University of Mining and TechnologyXuzhou 221116China

The sluggish redox reaction kinetics of lithium polysulfides(LiPSs)are considered the main obstacle to the commercial application of lithium-sulfur(Li-S)*** accelerate the conversion by catalysis and inhibit the shuttling of soluble LiPSs in Li-S batteries,a solution is proposed in this *** solution involves fabrication of N,S co-doped carbon coated In_(2)O_(3)/In_(2)S_(3)heterostructure(In_(2)O_(3)-In_(2)S_(3)@NSC)as a multifunctional host material for the *** In_(2)O_(3)-In_(2)S_(3)@NSC composite can reduce the Gibbs free energy for the conversion reactions of LiPSs,which results in superior *** synergy between different components in In_(2)O_(3)-In_(2)S_(3)@NSC and the unique 3D structure facilitate ion and electron transport in Li-S *** In_(2)O_(3)-In_(2)S_(3)@NSC/Li 2 S 6 cathode exhibits excellent rate capacity,with a capacity of 599 mAh g−1 at 5.5 C,and good cycle stability,with a capacity of 436 mAh g^(−1)after 1000 cycles at 1 ***,this study proposes a promising solution to improve the energy storage properties of Li-S batteries,which could potentially facilitate the commercialization of Li-S batteries.

关键词： Li-S battery Multifunctional host material Synergy Heterostructures Energy storage properties

Numerical study on solid–liquid phase change in paraffin as phase change material for battery thermal management

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Science Bulletin 2016年第5期61卷 391-400页

作者： Qiannan Zhang Yutao Huo zhonghao rao School of Electric Power Engineering China University of Mining and Technology Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education Southeast University

With the large latent heat and low cost, the paraffin has been widely used in battery thermal management(BTM) system to improve the efficiency and cycling life of power battery. The numerical model of paraffin melting in a cavity has been established, and the effects on the solid–liquid phase change process have been investigated for the purpose of enhancing the heat transfer performance of paraffin-based BTM system. The results showed that the location of the heating wall had great effects on the melting process. The paraffin in the cavity melted most quickly when the heating wall located at the bottom. Furthermore, the effects of thermal conductivity and the velocity of the slip wall have been considered. The gradient of liquid fraction increased with the increase in thermal conductivity, and the melting process could be accelerated or delayed by the slip wall with different velocity.

关键词： Phase change material Battery thermal management Solid–liquid phase change Heat flux Thermal conductivity

Experimental Study on Thermal Properties and Light-to-Thermal Conversion Performance of Ionic Liquids Based Nanofluids

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Journal of Thermal Science 2023年第6期32卷 1956-1972页

作者： LIU Changhui SHI Xiancong GAO Ding CAO Yuqi GU Yanlong rao zhonghao School of Low-carbon Energy and Power Engineering China University of Mining and TechnologyXuzhou221116China School of Chemistry and Chemical Engineering Huazhong University of Science and TechnologyWuhan430074China School of Chemistry and Chemical Engineering The Key Laboratory for Green Processing of Chemical Engineering of Xinjiang BingtuanShihezi UniversityShihezi832003China School of Energy and Environmental Engineering Hebei University of TechnologyHebei300130China

As a new type of energy transport medium with high efficiency and high heat transfer performance,nanofluids have shown broad application prospects in the fields of thermodynamics,solar heat collection,microelectronics,thermal energy,and material *** wide liquid range and environmental properties of ionic liquids have drawn ample attention to their application when used as a working fluid,especially as a base solvent of *** ionic liquid-based nanofluids were prepared by a two-step method using 1-ethyl-3-methylimidazole trifluoroacetate ionic liquid as a base solvent and graphene oxide(GO)as a *** properties study reveals that the thermal conductivity could be enhanced by 3.0%with the addition of 0.05 wt%GO,and the viscosity and the specific heat capacity were also subject to study as a function of testing temperature and concentration of ***,the photothermal conversion efficiency of these nanofluids was studied comprehensively under different *** results show that the photothermal conversion efficiency can reach 83%within an irradiation time of 6000 s and the highest temperature of the nanofluids is up to 105.89℃with a maximum photothermal conversion efficiency increase by 29%.

关键词： nanofluids ionic liquid GO photothermal conversion

Fabrication of fire-retardant building materials via a hyper-crosslinking chemical conversion process from waste polystyrenes

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Energy and Built Environment 2022年第2期3卷 226-232页

作者： Changhui Liu Yuanhui Xie Ding Gao Xiancong Shi zhonghao rao School of Electrical and Power Engineering China University of Mining and TechnologyXuzhou 221116China

Polystyrene(PS)is rich in plastic materials,but it produces a large amount of waste every year,causing a huge burden on the *** PS plastic is the source of a common"white pollution"in daily life,it still has a high utilization *** the same time,the flammability of PS material determines that it cannot be applicated in places where fire accidents occur *** a result,its application has been greatly *** order to realize the efficient utilization of waste PS and broaden its scope of application,PS was modified by hyper-crosslinking in order to improve its fire-retardant *** this method,the PS solution with high purity was obtained by dissolving waste PS foam with 1,2-dichloroethane(DCE),and then the hyper-crosslinked polymer with high specific surface area was prepared by adding cross-linking agent formaldehyde dimethyl acetal(FDA)and a Lewis-acid catalyst ferric chloride(FeCl_(3)).Further studies showed that the effects of the amount of cross-linking agent FDA,catalyst FeCl_(3) and PS on the reaction products were *** addition,compared the as-prepared fire-retardant materials with PS foam from the aspects of flame retardancy and thermal insulation,it can be concluded that the fire-retardant performance of the materials prepared by this method has been significantly *** it is proved that this method is feasible towards the preparation of a large number of fire-retardant composite materials by using a scale-up experiment.

关键词： Waste polystyrene Building materials Fire-retardant Hyper-crosslinking High-value added utilization

Special Column on Convergence of Carbon Neutral Transition via Energy Storage Technologies

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Journal of Thermal Science 2023年第6期32卷 1955-1955页

作者： XU Ben ZHANG Xinjing rao zhonghao XU Chao MA Zhiwen Department of Mechanical Engineering University of HoustonUSA Institute of Engineering Thermophysics Chinese Academy of SciencesChina School of Energy and Environmental Engineering Hebei University of TechnologyChina School of Energy Power and Mechanical Engineering North China Electric Power UniversityChina National Renewable Energy Laboratory(NREL) USA

Limiting global warming to 1.5°C would be a herculean task to all human *** reach this goal,the world would have to curb its carbon emissions by at least 49%of 2017 levels by 2030 and then achieve carbon neutrality by *** renewable energy systems is a key to achieving the decarbonization ***,the intermittent nature of renewable energies is challenging because it can disrupt the daily operation of the electric *** storage technology is the key to resolve the problems of intermittency,volatility and low energy density in the large-scale utilization of clean and renewable energy.

关键词： energy Transition Convergence

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脉动热管强化传热及其应用研究进展

化工学报 2022年第2期73卷 535-565页

作者：赵佳腾吴晨辉戴宇成饶中浩中国矿业大学电气与动力工程学院江苏徐州221116 河北工业大学能源与环境工程学院天津300401 河北省热科学与能源清洁利用技术重点实验室天津300401

脉动热管作为一种新型热管技术,由于其结构简单、传热性能好以及环境适应性强等优点,在热管理、太阳能集热、余热回收等热传输领域都极具应用潜力。高热通量器件、热能的利用和回收等领域的快速发展,对传热装置的传热性能和工况适应性... 详细信息

脉动热管作为一种新型热管技术,由于其结构简单、传热性能好以及环境适应性强等优点,在热管理、太阳能集热、余热回收等热传输领域都极具应用潜力。高热通量器件、热能的利用和回收等领域的快速发展,对传热装置的传热性能和工况适应性提出了更高的要求。为进一步强化内部两相流传热以及适应不同工况,结构多样的新型脉动热管应运而生。针对新结构脉动热管的研究进展,主要从强化传热性能的内部结构优化、适应不同应用需求的外部新结构及新结构脉动热管的应用研究三个方面进行总结。后续的研究应该在明晰运行机制的基础上,设计出通用性的新结构脉动热管。

关键词：脉动热管新结构优化两相流传热

氧化铝包覆金属锡相变微胶囊的制备及相变性能研究

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工程热物理学报 2023年第10期44卷 2663-2672页

作者：盛楠刘韧婕卢家辉朱春宇饶中浩中国矿业大学低碳能源与动力工程学院徐州221116 河北工业大学能源与环境工程学院天津300401

以金属Sn为相变材料,采用溶胶–凝胶包覆法和高温热处理制备出具有核壳结构的Sn@Al_(2)O_(3)相变储热微胶囊。利用粉末晶体X射线衍射仪(XRD)、扫描电子显微镜(SEM)、能谱仪(EDS)、电子探针显微分析仪(EPMA)和差示扫描量热分析仪(DSC)对... 详细信息

以金属Sn为相变材料,采用溶胶–凝胶包覆法和高温热处理制备出具有核壳结构的Sn@Al_(2)O_(3)相变储热微胶囊。利用粉末晶体X射线衍射仪(XRD)、扫描电子显微镜(SEM)、能谱仪(EDS)、电子探针显微分析仪(EPMA)和差示扫描量热分析仪(DSC)对样品进行性能分析。研究了不同气氛下高温热处理对核壳结构的影响,同时对微胶囊样品进行热循环稳定性表征。结果表明:Sn@Al_(2)O_(3)相变微胶囊的壳层厚度为1~3μm之间,且具有SnO_(2)-Al_(2)O_(3)双层壳结构;在氧气和氮气气氛下热处理分别获得Sn@Al_(2)O_(3)-O_(2)和Sn@Al_(2)O_(3)-N2微胶囊样品的相变温度均约为233℃,相变潜热分别为52.0 J/g和54.5J/g。经过100次循环测试后,Sn@Al_(2)O_(3)-O_(2)相变微胶囊表现出良好的循环热稳定性。

关键词：相变材料微胶囊储热潜热

基于尿素/氯化胆碱低共熔溶剂体系纳米流体制备及其热物性研究

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化工学报 2021年第3期72卷 1333-1341页

作者：刘昌会刘红莉张天键饶中浩中国矿业大学电气与动力工程学院江苏徐州221116

随着电子工业的快速发展,传统换热工质由于其较低的热导率已无法满足越来越高的换热需求。另一方面,传统的换热工质受限其相对较窄的液程范围而无法使用于复杂的温况或特殊的工作条件。低共熔溶剂(DESs)具有与离子液体相似的低饱和蒸气... 详细信息

随着电子工业的快速发展,传统换热工质由于其较低的热导率已无法满足越来越高的换热需求。另一方面,传统的换热工质受限其相对较窄的液程范围而无法使用于复杂的温况或特殊的工作条件。低共熔溶剂(DESs)具有与离子液体相似的低饱和蒸气压、高沸点及强稳定性等优势,在传热领域具有巨大的潜力。制备了以尿素/氯化胆碱低共熔溶剂体系为基液,石墨烯、Al2O3、TiO2三种纳米粒子填充的纳米流体,研究了黏度、热导率等热物性与纳米粒子和基液组成之间的关系,并系统地研究了纳米粒子结构对其稳定性的影响。实验结果表明,纳米粒子的填充会在一定程度上增加基液的黏度,其中石墨烯填充的纳米流体的黏度增加最大。此外,石墨烯能显著提高DESs的导热性能,其中6%(质量)石墨烯纳米流体热导率相比基液可增加29.0%。

关键词：低共熔溶剂纳米粒子传热纳米流体颗粒流