气液喷射升压有机朗肯循环特性
摘要：摘要针对小型有机朗肯循环工质泵效率低、耗功大等问题,将气液喷射器取代工质泵作为升压设备,基于喷射器一维模型,构建了气液喷射升压有机朗肯循环（IORC）的热力模型。以140 ℃的中低温热源为驱动力,R245fa为工质,研究了喷射器引射系数、喷射器面积比以及冷凝器出口过冷度3个参数对IORC性能的影响,并将IORC与基本有机朗肯循环（BORC）的热力性能进行对比。结果表明,存在一个最佳引射系数和过冷度,使IORC的净输出功达到最大值。引射系数和面积比的增加均会使喷射器升压比降低,而过冷度的增加会使升压比增加。3个参数的增加均会使喷射器㶲效率和换热器经济性降低。IORC的换热器经济性比BORC更好,当工质泵效率低于52%时,IORC净输出功更具优势。
Abstract:：To address the issues of low efficiency and high power consumption of working fluid pumps used in small-scale organic Rankine cycle, the working fluid pump was replaced with a vapor-liquid injector as the pressurized equipment and a thermodynamic model of the vapor-liquid injector pressurized organic Rankine cycle (IORC) was established based on the one-dimensional model of the injector. Using 140 °C medium-low temperature heat source as the driving force and R245fa as the working fluid, the effects of three parameters, namely entrainment ratio of the injector, area ratio of the injector, and subcooling of the condenser outlet, on the performance of IORC were investigated, and the thermal performance of IORC was compared with that of basic organic Rankine cycle (BORC). The results showed that an optimal entrainment ratio and subcooling exist, which maximize the net power of IORC. The increase in entrainment ratio and area ratio will decrease the pressure lift of the injector, while the increase in subcooling will increase the pressure lift. The increase of these three parameters will lead to a decrease in the exergy efficiency of the injector and the heat exchanger economy. The heat exchanger economy of IORC is better than that of BORC, and when the working fluid pump efficiency is below 52%, IORC has more advantages in net power.
中文标题：气液喷射升压有机朗肯循环特性
英文标题：Performance Characteristics of Vapor-Liquid Injector Pressurized Organic Rankine Cycle
发表时间：2023-11-21
作者：
熊远帆, 孙斌, 李华山, 龚宇烈
作者简介：
熊远帆（1999-）,男,硕士研究生,主要从事中低温热源开发与利用研究。龚宇烈（1978-）,男,博士,研究员,博士生导师,主要从事中低温热源开发与利用研究。
关键词：中低温热源,发电,有机朗肯循环,气液喷射器,循环特性,
Key words：medium-low temperature heat source,power generation,organic Rankine cycle,vapor-liquid injector,cycle characteristic,
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