基于GT-Suite的有机朗肯循环系统性能分析  

PERFORMANCE ANALYSIS OF ORGANIC RANKINE CYCLE SYSTEM BASED ON GT-SUITE SOFTWARE

作　　者：宋松松[1,2] 张红光[1,2] 杨富斌[1,2] 贝晨[1,2] 王宏进[1,2] 孟凡骁 

机构地区：[1]北京工业大学环境与能源工程学院,北京100124 [2]北京电动车辆协同创新中心,北京100124

出　　处：《太阳能学报》2016年第6期1488-1493,共6页Acta Energiae Solaris Sinica

基　　金：北京市教育委员会科技计划重点项目(KZ201410005003);北京市自然科学基金(3152005);国家自然科学基金(51376011)

摘　　要：采用GT-Suite软件针对固定式天然气发动机排气余热回收系统(ORC)进行数值模拟,分析膨胀机的动态特性并以此确定ORC系统的运行状态,并在此运行状态下研究固定式天然气发动机-ORC联合系统的运行性能。结果表明,当固定式天然气发动机在低负荷区域运行时,膨胀机内的有机工质质量流量波动明显。联合系统的热效率随着发动机负荷的增加而增大,但是在高负荷区域增加幅度不明显。当发动机运行在额定工况点时,联合系统的热效率最大可提高5.0%,有效燃油消耗率(BSFC_(com))最大可降低4%。A numerical simulation model of ORC system of stationary CNG engine was built by using GT-Suite software, and the dynamic characteristics of expander were analyzed to determine the running state of the ORC system. The running performances of stationary CNG engine-ORC combined system were investigated. The results show that the fluctuation of refrigerant mass flow rate in expander is obvious during the engine runs in low-load region （from 20% to 40% of engine load）. The thermal efficiency of the combined system increases with engine load. However, the increment of thermal efficiency of combined system is slight in the high-load region of engine （from 90% to 100% of engine load）. Compared with the stationary CNG engine, the thermal efficiency of the combined system can be increased up to 5% （at the rated condition of engine）, while the brake specific fuel consumption （BSFC） can be reduced up to 4% （at the rated condition of engine）.

关 键 词：有机朗肯循环 固定式天然气发动机 数值模拟 联合系统 

分 类 号：TK115[动力工程及工程热物理—热能工程]