摘要
针对90℃热水型余热，以R123为工质，对应用于有机朗肯循环（ORC）系统的径流式汽轮机的喷嘴进行一维稳定流动分析，以单位质量热源水的发电量（比净功）最大为目标函数，开展ORC变工况实验研究。研究表明：R123的临界压力比为0．59—0．67，随工质压力的增大有小幅上升，实验系统需采用缩放喷嘴。系统比净功受换热性能，汽轮机效率，传动．发电效率以及系统总功率等多种因素的综合影响。实验中变蒸发压力最优工况为：蒸发压力O．46MPa，比净功0．40kJ／kg；变冷凝压力最优工况为：冷凝压力0．11MPa，系统比净功0．76kJ／kg。
The performance of a small organic Rankine cycle （ORC） power system with a radial turbine as its expander and R123 as the working fluid was experimentally investigated based on 90 ℃ low-temperature waste heat sources. With maximum power output by unit hot water as target function, the ORC various operation conditions were studied in experiment. The results indicate that the critical pressure ratio of R123 is at the range of 0.59-0.67, which increases slightly with the increase of the working fluid pressure, and a converging-diverging nozzle is needed for experimental system. The maximum power output is synthetically affected by heat transfer performance, turbine efficiency, drive- power generation efficiency, total power and other factors of the system. The optimum evaporation pressure and the corresponding maximum power output per unit mass of heat source water is 0.46 MPa and 0.40 kJ/kg, respectively; while the optimum condensation pressure and the corresponding maximum power output are 0.11 MPa and 0.76 kJ/kg, respectively.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2015年第6期1325-1330,共6页
Acta Energiae Solaris Sinica
基金
高等学校博士学科点专项科研基金资助项目(20110032110046)
关键词
有机朗肯循环
径流式汽轮机
喷嘴
临界压力比
实验优化
organic Rankine cycle
radial turbine
nozzle
critical pressure ratio
experimental optimization
