Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
ANALYSIS OF ISENTROPIC TURBINE EFFICIENCY, PRESSURE AND TEMPERATURE ON A SUBCRITICAL ORGANIC RANKINE CYCLE (ORC) WITH SUPERHEAT USING WET AND DRY FLUIDS
Submission Author:
Aline Jauch Antônio , SP
Co-Authors:
Aline Jauch Antônio, Douglas Ricardo Fumes, Santiago del Rio Oliveira
Presenter: Aline Jauch Antônio
doi://10.26678/ABCM.COBEM2019.COB2019-0158
Abstract
Through mathematical models, based on thermodynamic laws, working fluids can be selected to achieve greater thermal cycle efficiencies in organic Rankine cycles (ORC). The main objective of this study is to develop a theoretical mathematical model to obtain values of the cycle thermal efficiency and cycle specifc net work from the combination between some parameters, such as: turbine inlet temperature, saturation temperature and isentropic turbine efficiency for different fluids, classified as wet and dry. After the simulation, performing several variations in the cycle parameters, it was observed that the highest values of the cycle thermal efficiency and the cycle specific net work occurred for the combination between 90% of the critical pressure and 120% of the critical temperature for all fluids tested. It was analyzed the level of influence that each parameter presents in the cycle thermal efficiency, and the influence of combination of the parameters. It was concluded that the saturation temperature presents the highest influence in the cycle thermal efficiency. However, when a combination of all parameters is performed, a highest level of influence can be obtained. Therefore, in this study was developed a mathematical model for the cycle thermal efficiency as a function of the combination of studied parameters.
Keywords
organic Rankine cycles, isentropic efficiency, Dry fluids, wet fluids, cycle thermal efficiency
