Regenerative Organic Rankine Cycle as Bottoming Cycle of an Industrial Gas Engine: Traditional and Advanced Exergetic Analysis

This investigation shows a traditional and advanced exergetic assessment of a waste heat recovery system based on recuperative ORC (organic Rankine cycle) as bottoming cycle of a 2 MW natural gas internal combustion engine. The advanced exergetic evaluation divides the study into two groups, the avoidable and unavoidable group and the endogenous and exogenous group. The first group provides information on the e ciency improvement potential of the components, and the second group determines the interaction between the components. Asensitivity analysis was achieved to assess the e ect of condensing temperature, evaporator pinch, and pressure ratio with net power, thermal e ciencies, and exergetic e ciency for pentane, hexane, and octane as organic working fluids, where pentane obtained better energy and exergetic results. Furthermore, an advanced exergetic analysis showed that the components that had possibilities of improvement were the evaporator (19.14 kW) and the turbine (8.35 kW). Therefore, through the application of advanced exergetic analysis, strategies and opportunities for growth in the thermodynamic performance of the system can be identified through the avoidable percentage of destruction of exergy in components.

• Autores: Cardenas Gutierrez, Javier
• Fecha de publicación: 2020
• Institución: Universidad del Atlántico
• Repositorio: Repositorio Uniatlantico
• Idioma: eng
• OAI Identifier: oai:repositorio.uniatlantico.edu.co:20.500.12834/1032
• Acceso en línea: https://hdl.handle.net/20.500.12834/1032
• Palabra clave: advanced exergetic analysis; waste heat recovery; industrial gas engine; recuperative organic Rankine cycle; exergy e ciency
• Rights: openAccess
• License: http://creativecommons.org/licenses/by-nc/4.0/