基于模拟退火算法的有机朗肯循环的性能优化  

Performance Optimization of Organic Rankine Cycle Based on Simulated Annealing Algorithm

作　　者：王娟丽[1] 何雅玲[1] 程泽东[1] 席奂[1] 

机构地区：[1]西安交通大学能源与动力工程学院,热流科学与工程教育部重点实验室,陕西西安710049

出　　处：《工程热物理学报》2013年第9期1606-1610,共5页Journal of Engineering Thermophysics

基　　金：国家重点基础研究发展计划(973计划)(No.2013CB228304);教育部高等学校博士学科点专项科研基金优先发展领域资助项目(No.20120201130006)

摘　　要：本文首先介绍了一种有机朗肯循环（ORC）的工质筛选过程，即针对工质的环保特性、循环热效率及净输出功等选出了14种综合性能较好的工质。然后，针对所选工质，采用模拟退火算法对基本有机朗肯循环（BORC）和内回热有机朗肯循环（ORCIH）性能进行了优化计算，对比了两种循环在最佳工况下的热力学性能，并分析了变热源温度对BORC热力学性能的影响。结果显示，对于各所选工质，ORCIH的热效率与拥效率相对于BORC分别提高了0．80％-3．34％和3．20％-10．22％，而BORC热效率、工质质量流量和循环净输出功均随着热源温度的升高而增大。在所选非制冷工质中benzene循环性能最好，制冷工质中R245ca与R245fa综合性能最好。First, a procedure to select working fluids for the Organic Rankine Cycle （ORC） was introduced. Fourteen working fluids of better overall performance were selected based on their better environmental characteristics, thermal efficiency and net power output. Then, the performance of the Basic Organic Rankine Cycle （BORC） and the Organic Rankine Cycle with Inner Heat-exchanger （ORCIH） were optimized for the selected fourteen working fluids, by the simulated annealing algorithm. And the performance of these two cycles under the optimized condition were compared and analyzed. Furthermore, the performance of the BORC was analyzed as heat source temperature changed. The results show that the thermal efficiency and the exergy efficiency of the ORCIH are 0.80%-3.34% and 3.20%-10.22% larger than that of the BORC, respectively. The thermal efficiency, the working fluid mass flow rate and the net power output of both the BORC and the ORCIH increase with an increase in the temperature of the heat source. Among these selected working fluids, benzene from the non-refrigerants shows the best cycle performance while R245ca and R245fa from the refrigerants show better overall performance.

关 键 词：有机朗肯循环 工质筛选 模拟退火算法 性能优化 [火用]效率 

分 类 号：TK124[动力工程及工程热物理—工程热物理]