耦合传递与转换过程模型的有机朗肯循环热力学研究

项目名称： 耦合传递与转换过程模型的有机朗肯循环热力学研究

项目编号： No.51306048

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 能源与动力工程

项目作者： 苗政

作者单位： 华北电力大学

项目金额： 25万元

中文摘要： 有机朗肯循环（ORC）是实现中低温热源有效利用的关键技术之一。针对现有ORC研究中系统与冷热源耦合机理有待深入挖掘；理论模型以系统层面的热力学分析为主，急需加强对传递/转换过程层面的有效耦合；系统分析与优化大多针对单一工况，急需解决多个工况下的综合优化等问题，本项目提出，(1)建立耦合换热器、膨胀机和流体输送三个关键传递/转换过程子模型的ORC热力学分析模型，进行系统层面与过程层面的协同计算，探索ORC系统与冷热源耦合机理。（2）以冷热源属性为约束条件，集成ORC设计优化和性能预测两个阶段的计算，进行多个工况的综合优化与评价，揭示系统偏离设计工况时的运行规律和系统与过程的匹配机理。（3）利用团队现有ORC实验台，开展1-2种纯工质的亚临界循环性能测试，验证热力学分析结果。根据以上研究，得到与典型冷热源属性相匹配的循环工质、循环模式及运行参数，为中低温热源有效利用提供数据支撑。

中文关键词： 有机朗肯循环；实验；模型；系统；部件

英文摘要： The Organic Rankine Cycle is one of the key technologies to fulfill the efficient utilization of low/medium heat sources. The research progress indicates that the coupling mechanism of ORC with heat/cool sources needs to be well investigated; theoretical optimization model mainly focuses on the system level, requiring the coupling of transfer/conversion process models; parameter optimization mainly aims at the single case, lacking the multi-case optimization. Based on the analysis above, the main research contents we will carry out are as follows. (1)develop a theoretical model of the ORC coupled with submodels of 3 key transfer/conversion processes, including the heat exchanger, the expader and the fluid bumping unit. This model can keep a good balance between the system level optimization and the prcess level calculation. The coupling mechanism of ORC system with the heat/cool sources will be investigated. (2) The coupling calculation between system design and performance prediction will be well organized to implement the multi-case optimization of the ORC. System parameters will be optimized under constraints of the heat/cool sources. The performance variation and process interaction rules will be well researched as the ORC's working conditions deviate from the optimum ones. (3) Tests of system performance an

英文关键词： organic Rankine cycle；experiment；model；system；component