Working Fluids Optimization Based on Economical Performance and Thermodynamic Performance for 350kW ORC System. Issue 1 (January 2021)

• Record Type: Journal Article
• Authors: Wei, Lihong; Jiang, Hua; Guo, Ruiling; Zhang, Haorui
• Is Part Of: IOP conference series. Volume 647:Issue 1(2021)
• Publication Date: 2021-01
• Subjects: Earth sciences -- Periodicals; Environmental sciences -- Congresses; Environmental sciences -- Periodicals; 550.5
• DOI: 10.1088/1755-1315/647/1/012037
• Languages: English
• ISSNs: 1755-1307

Abstract

Abstract: This paper established a 350kW level organic Rankine cycle(ORC) system with the 393.15K flue gas as heat source. Nine kinds of working fluids were selected based on comprehensive consideration of thermal physical properties, environmental performance and safety. The optimum one was selected from them by comparing and evaluating their thermodynamic performance and economic performance at different evaporation temperatures. The results show that the thermal efficiency of system using R236fa increased firstly and then decreased with the increase of evaporation temperature, while the exergy efficiency and economic performance increase gradually. The thermodynamic performance and economic performance of others increased with evaporation temperature increasing. When the exergy efficiency was taken as the evaluation index, isopentane was the best working fluid. However, the thermal efficiency, levelized electricity cost( LEC ) and discounted payback period( DPP ) of the system using butane better than others. Therefore, butane is considered to be the most appropriate working fluid for this system among the nine working fluids.