有机朗肯循环系统及其透平设计研究

DESIGN AND STUDY OF ORGANIC RANKINE CYCLE(ORC) AND TURBINE FOR ORC

本文对可用于工业低温余热回收的有机朗肯循环(ORC)热力系统进行简述,采用热力学第一定律、热力学第二定律分析ORC热力系统及其效率,并对有机工质动力透平的特点及设计造型进行概述。最后采用F11,R123,R245ca,R600和R600a为工质,设计有机朗肯系统回收某一工业余热,并以R123为工质进行有机工质透平的气动设计、造型设计和CFD模拟计算研究,并对透平进行造型优化。研究表明,以R123为工质的有机朗肯循环系统能有效可靠利用该工业余热,所设计的有机工质透平基本达到设计要求,透平造型的优化设计能有效改善透平叶轮内部流动。

This paper summarizes the Organic Rankine Cycle system, studies the thermodynamic performance through the application of the first and second laws of thermodynamics and then introduces the characteristics of the turbine for ORC. The ORC system for the recovery of the low temperature waste heat from industry is designed and optimized using Fll, R123, R245 ca, R600 and R600 a. Then the aerodynamic design and geometric optimization of the turbine in ORC system for R123 is presented, followed by the evaluation of CFD simulation. The study shows： the design of ORC system is effective for the low temperature waste heat recovery; the aerodynamic design of the turbine is satisfactory and the geometric optimizations improve the flow field in the flow passages.