全封闭式涡旋膨胀机在车用有机朗肯循环中的特性研究  

Parametric Research on Hermetic Scroll Expander Integrated into Vehicle Organic Rankine Cycle Power Plant System

作　　者：杨婧烨 孙子扬 陆冰清[1,2] 施骏业 陈江平[1,2] Yang Jingye;Sun Ziyang;Lu Bingqing;Shi Junye;Chen Jiangping(Institute of Refrigeration and Cryogenics,Shanghai Jiao Tong University,Shanghai,200240,China;Shanghai High Efficient Cooling System Research Center,Shanghai,200240,China)

机构地区：[1]上海交通大学制冷与低温工程研究所,上海200240 [2]上海高效冷却系统工程技术研究中心,上海200240

出　　处：《制冷学报》2018年第4期106-110,共5页Journal of Refrigeration

摘　　要：本文针对中低温余热特性搭建了2kW目标发电量的小型有机朗肯循环发电系统。实验研究了全封闭式涡旋膨胀机在有机朗肯循环系统中的参数特性。通过改变膨胀机进出口的状态,研究了运行压比和转速对于膨胀机单体及系统性能的影响。性能参数主要包括等熵效率、容积系数、循环热效率及循环净功。结果表明:膨胀机运行压比是影响系统性能的重要参数,循环净功随压比的增大而增加,循环热效率及膨胀机的等熵效率随压比变化均存在最优值;考虑内泄漏及摩擦损失等影响,最优运行压比一般应略大于膨胀机设计比;提高膨胀机转速能有效减少内泄漏损失。A2-kW small-scale organic Rankine cycle power plant system targeted for medium-low temperature heat sources was established in this paper. The experimental research was aimed at investigating how expansion parameters affect the system performance. The performance indicators include isentropic efficiency,filling factor,cycle thermal efficiency,and cycle output power. The results indicate that the expander pressure ratio is an important parameter that influences the cycle performance. The cycle output power increases with the increase of pressure ratio,while there exists an optimum point for both isentropic efficiency and cycle thermal efficiency. Considering the effect of internal leakage and mechanical friction loss,the optimum operating pressure ratio should be slightly higher than the built-in volume ratio of the expander. It turns out that increasing the expander rotational speed can effectively decrease the internal leakage.

关 键 词：有机朗肯循环 运行压比 容积系数 等熵效率 热效率 

分 类 号：TB611[一般工业技术—制冷工程] TB653