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基于电-化-热耦合关系NH_(3)-SOFC数值模拟
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作者 胡书球 于洁 +4 位作者 王彬 乔翠 吕国强 李绍元 马文会 《化学工程》 CAS CSCD 北大核心 2023年第3期66-71,共6页
为探究高温工作状态下的电池内部运行情况,对固体氧化物燃料电池(SOFC)电化学性能及传热传质分布情况进行有效分析,利用COMSOL Multiphysics软件,结合电池内气体扩散、浓物质传递、热量传递和电极中二次电流密度构建多物理场模型,研究了... 为探究高温工作状态下的电池内部运行情况,对固体氧化物燃料电池(SOFC)电化学性能及传热传质分布情况进行有效分析,利用COMSOL Multiphysics软件,结合电池内气体扩散、浓物质传递、热量传递和电极中二次电流密度构建多物理场模型,研究了NH_(3)-SOFC中的传热传质、化学和电化学反应特性。结果表明:燃料为氨气时,提高电池工作温度有利于提高电池输出功率,当1073.2 K工作温度继续提高时,最大功率和电流密度增长速度降低;NH_(3)-SOFC与H_(2)-SOFC输出性能相近。进一步探究了温度和反应物进气摩尔分数对NH_(3)-SOFC性能影响。发现入口氨气摩尔分数自0.7提升至1时,电池性能得到明显提高;而氧气摩尔分数高于0.2时,其对电池性能影响较小,空气可作为电池阴极气体使用。 展开更多
关键词 直接氨燃料 固体氧化物燃料电池 电化学 数值模拟
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固体氧化物燃料电池电解质材料的研究进展 被引量:8
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作者 刘辉 于洁 +2 位作者 乔翠 王彬 李东鑫 《电源技术》 CAS 北大核心 2020年第10期1549-1551,共3页
高离子电导率的电解质材料促进固体氧化物燃料电池(SOFC)的发展,且在SOFC运行环境下,能使电池长期稳定地运行。综述了ZrO2基电解质、CeO2基电解质、Bi2O3基电解质和LaGaO3基电解质材料的结构、研究进展以及优缺点,并对未来电解质材料的... 高离子电导率的电解质材料促进固体氧化物燃料电池(SOFC)的发展,且在SOFC运行环境下,能使电池长期稳定地运行。综述了ZrO2基电解质、CeO2基电解质、Bi2O3基电解质和LaGaO3基电解质材料的结构、研究进展以及优缺点,并对未来电解质材料的发展趋势进行了展望。 展开更多
关键词 固体氧化物燃料电池 电解质 研究进展
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固体氧化物燃料电池Cu/Ni-LSCM阳极中n(Cu)/n(Ni)对碳沉积影响数值模拟研究 被引量:1
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作者 王彬 于洁 +4 位作者 康丁文 刘辉 乔翠 吕国强 马文会 《化学工业与工程》 CAS CSCD 北大核心 2022年第3期89-97,共9页
固体氧化物燃料电池(SOFC)使用碳氢化合物为燃料时,多孔阳极易出现严重的积碳的现象,导致阳极催化活性降低,电池功率密度下降以及电池寿命急剧衰减。铬酸镧基钙钛矿材料在高温氧化和还原气氛下具有较好的稳定性、电催化活性和抗积碳性... 固体氧化物燃料电池(SOFC)使用碳氢化合物为燃料时,多孔阳极易出现严重的积碳的现象,导致阳极催化活性降低,电池功率密度下降以及电池寿命急剧衰减。铬酸镧基钙钛矿材料在高温氧化和还原气氛下具有较好的稳定性、电催化活性和抗积碳性能。建立LSCM以及Cu/Ni-LSCM中CH_(4)与CO_(2)干重整动力学模型,模型耦合了动量传递、质量传递、化学反应动力学、域微分方程以及气体在多孔介质中的传质模型,并利用该模型研究了Cu/Ni-LSCM阳极材料的抗积碳性能、催化活性以及孔隙率随时间的变化情况。得出结论:Cu的引入可以明显降低碳沉积速率,在一定基础上增加燃料转化率。其中CH_(4)热分解是形成积碳的主要原因。与此同时,模拟结果显示阳极燃料入口处为碳沉积最为严重的区域。 展开更多
关键词 SOFC阳极材料 Cu/Ni-LSCM 碳沉积 数值模拟
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Net Present Value Method: A Method Recommended by ISO 15686-5 for Economic Evaluation of Building Life Cycle Costs
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作者 Hao Xie qiao cui Yang Li 《World Journal of Engineering and Technology》 2022年第2期224-229,共6页
The publication of ISO 15686-5 is significant for studies related to the life-cycle costs of buildings. Among the many economic evaluation methods, the NPV method is recommended for use by this standard. This stu... The publication of ISO 15686-5 is significant for studies related to the life-cycle costs of buildings. Among the many economic evaluation methods, the NPV method is recommended for use by this standard. This study explains the concept and method of PV, and then provides an explanation of the concept and method of NPV, and points out the limitations in the practical application of the method. 展开更多
关键词 NPV ISO 15686-5 BUILDING Life Cycle Cost Economic Evaluation
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Contribution of the cryosphere to runoff in“Chinese water tower”based on environmental isotopes 被引量:2
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作者 Zongxing Li Juan Gui +2 位作者 Qi Feng Baijuan Zhang qiao cui 《Geoscience Frontiers》 SCIE CAS CSCD 2023年第5期173-188,共16页
Cryospheric meltwater is an important runoff component and it profoundly influences changes in water resources in the Tibetan Plateau.Significant changes in runoff components occur in the three-river headwater region(... Cryospheric meltwater is an important runoff component and it profoundly influences changes in water resources in the Tibetan Plateau.Significant changes in runoff components occur in the three-river headwater region(TRHR),which is an important part of“Chinese Water Tower”due to climate warming.However,these effects remain unclear owing to the sparse and uneven distribution of monitoring sites and limited field investigations.Quantifying the contribution of cryospheric meltwater to outlet runoff is a key scientific question that needs to be addressed.In this study,we analyzed 907 precipitation,river water,ground ice,supra-permafrost water,and glacier snow meltwater samples collected from October 2019 to September 2020 in the TRHR.The following results were obtained:(1)There was significant spatio-temporal variation in stable isotopes in different waters;(2)The seasonal trends of stable isotopes for different waters,the relationship between each water body and the local meteoric water line(LWML)confirmed that river water was mainly recharged by precipitation,supra-permafrost water,and glacier snow meltwater;(3)Precipitation,supra-permafrost water,and glacier snow meltwater accounted for 52%,39%,and 9%of river water,respectively,during the ablation period according to the end-member mixing analysis(EMMA);(4)In terms of future runoff components,there will be many challenges due to increasing precipitation and evaporation,decreasing snow cover,glacier retreat,and permafrost degradation.Therefore,it is crucial to establish the“star-machine-ground”observation networks,forecast extreme precipitation and hydrological events,build the“TRHE on the Cloud”platform,and implement systematic hydraulic engineering projects to support the management and utilization of water resources in the TRHR.The findings of environmental isotope analysis provide insights into water resources as well as scientific basis for rational use of water resources in the TRHR. 展开更多
关键词 Cryospheric meltwater Chinese water tower Hydrograph separation
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Antitumor mechanism of Se-containing polysaccharide,a novel organic selenium compound 被引量:3
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作者 Dejing SHANG qiao cui +4 位作者 Yang LI Zhi YU Lei WEN Yuan ZHAO Jianing ZHANG 《Frontiers in Biology》 CSCD 2009年第3期248-253,共6页
Recent studies on the inhibition of tumor growth by Se-containing polysaccharide were reviewed.Meanwhile,the possible molecular mechanisms of the inhibition of tumor cell growth through antioxidation,induction of tumo... Recent studies on the inhibition of tumor growth by Se-containing polysaccharide were reviewed.Meanwhile,the possible molecular mechanisms of the inhibition of tumor cell growth through antioxidation,induction of tumor cell apoptosis,blockade of cell cycle,and enhancement of immunity by Se-containing polysaccharide were proposed.In the end,the potential application of Se-containing polysaccharide in the prevention and treatment of tumor was elucidated. 展开更多
关键词 Se-containing polysaccharide ANTITUMOR ANTIOXIDANT organic selenium apoptosis
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