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        碳基燃料SOFC系統(tǒng)構(gòu)建及成果集成演示研究報(bào)告

        2016-05-30 00:33:49杜曉佳孫再洪
        科技創(chuàng)新導(dǎo)報(bào) 2016年10期

        杜曉佳 孫再洪

        摘 要:該研究目標(biāo)就是利用其他課題的基礎(chǔ)研究成果,開發(fā)電池堆材料,設(shè)計(jì)安裝電池堆,并進(jìn)行電池堆集成演示,為驗(yàn)證其他課題研究成果提供平臺(tái),并為實(shí)現(xiàn)SOFC技術(shù)發(fā)展的國(guó)家目標(biāo)做出貢獻(xiàn)。研究?jī)?nèi)容包括:研究適合一體化SOFC的新型密封材料體系及封接工藝,獲得密封材料組成、配方及封接方式;基于一體化SOFC單電池結(jié)構(gòu)及其組合方式,設(shè)計(jì)并優(yōu)化連接體結(jié)構(gòu);建立電池堆數(shù)學(xué)模型和實(shí)驗(yàn)驗(yàn)證方法,設(shè)計(jì)電池堆結(jié)構(gòu)提供依據(jù);建立和優(yōu)化電池堆的集成工藝,組裝電池堆。取得的初步成果:(1)以12G封料為基礎(chǔ)的玻璃和玻璃-氧化鋯復(fù)合封接材料取得了初步成功并已用于電池和電堆測(cè)試;(2)設(shè)計(jì)了第一代雙極板電堆連接體,取得了連接體的設(shè)計(jì)經(jīng)驗(yàn)。在此基礎(chǔ)上設(shè)計(jì)出了先進(jìn)的以薄板結(jié)構(gòu)為特征的第二代電堆連接體,為今后功率的擴(kuò)容和產(chǎn)業(yè)化打下了基礎(chǔ);(3)建立了電池堆數(shù)學(xué)模型,創(chuàng)建了電場(chǎng)、流場(chǎng)、溫場(chǎng)耦合均勻性評(píng)價(jià)實(shí)驗(yàn)方案,為電池堆設(shè)計(jì)提供了關(guān)鍵參數(shù);(4)發(fā)了第一代電堆集成工藝、檢測(cè)系統(tǒng)和電堆測(cè)量技術(shù)。在此基礎(chǔ)上結(jié)合第二代連接體設(shè)計(jì)的改進(jìn),設(shè)計(jì)了第二代電堆集成裝置和安裝程序;第二代電堆設(shè)計(jì)克服了第一代電堆設(shè)計(jì)中的關(guān)鍵障礙,為今后降低電堆成本、擴(kuò)大容量、增強(qiáng)重復(fù)性和可靠性打下了基礎(chǔ)。與國(guó)內(nèi)外同類研究工作相比的創(chuàng)新性:開發(fā)的BiBaSi系玻璃-ZrO2復(fù)合密封材料既保持了玻璃高密封效率,又克服了玻璃密封件厚度難以掌控的缺點(diǎn)。在連接體設(shè)計(jì)中,第二代連接件設(shè)計(jì)采用了薄板結(jié)構(gòu),內(nèi)置式氣體進(jìn)出氣柜,接近了國(guó)際設(shè)計(jì)水平。在電池堆集成安裝方面,第二代電堆的集成安裝設(shè)備及工藝簡(jiǎn)潔流暢,重復(fù)性好,為以后擴(kuò)大生產(chǎn)創(chuàng)造了條件。

        關(guān)鍵詞:SOFC 碳基燃料 連接件 密封材料 電池堆

        Abstract:The objectives of Task VI include development of new stack materials, design, assembling and demonstration of SOFC stacks by use of research results achieved by rest tasks of this 973 project. Achievement of these objectives, especially the development of SOFC stacks will provide other task teams with a reliable platform to evaluate and demonstrate their research results, and furthermore, make contributions to national strategic objectives on SOFC technology development... To realize the objectives, the work scope of task VI was set as bellow:Development of new gasket materials and sealing technology for PEN co-structured SOFCs (CS-SOFCs), including material compositions, processing and application technology;Design and optimization of interconnect suitable for CS- SOFCs structure and assembling;Developing stack modeling and related experimental evaluation methods, providing parameters for stack designs.;Establishing and optimizing stack integration technology and assembling stacks for demonstration. Through the first two-year efforts made by task leader, Suzhou Huatsing Jingkun New Energy Technology Corporation, Ltd. (HSNETC), and its subcontractor, China University of Mining and technology (Beijing),all the works planed for the period were completed and the objectives were achieved. In details, the major achievements are as below:(1)Developed 12G-based glass and glass-zirconia composite sealing materials which were successfully used for single cell and SOFC stack testing;(2)Designed the first generation of interconnect with combined dual (air and fuel) flowfields structure. Based on the gained experiments, secondary interconnect was developed with thin stainless steels, which paved a way for future development of high power SOFC stacks, systems and commercialization.(3)Created mathematical stack modeling and established evaluation methods,which provided key parameters for stack designs.(4)Developed first generation technologies for stack assembling, examination and testing. Furthermore, secondary generation of stack assembling and evaluation technology was developed based on secondary generation of thin interconnect structure.The latest secondary stack design featured with thin stainless steel interconnects eliminated key technology obstacles in the first generation of stack design.Based on the achievements.gained in last two years,Task VI team are at good shape to accelerate SOFC cell, stack and system technology development.

        Key Words:SOFC;Coal-based fuels;Interconnect;Sealing material;Stack

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