可调喷射器应用于有机朗肯循环的热力学分析

Thermodynamic Analysis of Organic Rankine Cycle with Adjustable Ejector

基于作者前期研究所提出的EORC(喷射式有机朗肯循环),为适应变工况运行,提出采用可调节的喷射器应用于EORC,构成可调喷射式有机朗肯循环(简称AEORC)。针对环境温度变化造成冷凝温度的变化,在MATLAB平台上,对循环的变工况运行进行热力学性能计算,主要以净输出功为评价指标进行性能对比分析。由于单只可调喷射器的调节范围有限,进而提出采用双可调喷射器的EORC,构成双可调喷射器的喷射式有机朗肯循环(简称DAEORC)。结果表明,分别以冷凝温度20℃和30℃设计的两支可调喷射器,可以实现冷凝温度20-40℃范围内的有效调节,DAEORC的净输出功高于ORC。

Based on an organic Rankine cycle with ejector( EORC) proposed by the authors,an organic Rankine cycle with adjustable ejector( AEORC) is put forward to adapt to the change of operation conditions in this paper. For the condensation temperature of the cycle varies with the environmental temperature,the performance of the ejector and the EORC will change with the condensation temperature. The thermodynamic performance of the cycles in different operating conditions is calculated and analyzed on the basis of Matlab platform. The emphasis is on the net output power as the evaluation index. Due to the limited regulating range of single adjustable ejector,an organic Rankinecycle with double ejectors( DAEORC) is proposed and analyzed. The results show that the two adjustable ejectors designed at condensation temperature of 20 ℃ and 30 ℃ respectively can realize the regulation of the DAEORC within the condensation temperature of 20- 40 ℃. And the net output power of DAEORC is higher than ORC.