Publicación: Performance of an Organic Rankine Cycle with two expanders at off-design operation
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Fecha
2019-02-19
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info:eu-repo/semantics/openAccess
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Elsevier
Resumen
The objective of this work was to simulate the behavior of an Organic Rankine Cycle (ORC) system with two expanders in series at off-design working conditions. The influence of both the intermediate pressure and the volumetric expansion ratio of the expanders on the off-design performance of the ORC was studied and the irreversibilities of the components were analyzed. The performance of the ORC with two expanders for two different designs was also discussed.
The thermal efficiency reached using two expanders was higher than the obtained using only one. However, this increase conveyed an increase in the complexity of the design and control of the expanders. As an additional conclusion, it was found that the influence of the intermediate pressure is higher than that of the volume expansion ratio of each expander.
The irreversibility of the first expander was mainly due to leaks. However, the performance of the second expander was particularly affected by the difference between the discharged pressure and the condensation pressure. The off-design analysis allowed the definition of a methodology to achieve the desired power with the maximum thermal efficiency, and the identification of the best actuation for the part load operation.
Descripción
Este es el manuscrito aceptado del artículo. La versión registrada fue publicada por primera vez en Applied Thermal Engineering, 149, 688-701, está disponible en línea en el sitio web del editor: https://doi.org/10.1016/j.applthermaleng.2018.12.083
This is the accepted manuscript of the article. The registered version was first published in Applied Thermal Engineering, 149, 688-701, is available online at the publisher's website: https://doi.org/10.1016/j.applthermaleng.2018.12.083
Categorías UNESCO
Palabras clave
ORC, Scroll expander, Simulation, Two expanders, Exergy analysis
Citación
Ibarra, M., Rovira, A., & Alarcón-Padilla, D.-C. (2019). Performance of an Organic Rankine Cycle with two expanders at off-design operation. Applied Thermal Engineering, 149, 688-701. https://doi.org/10.1016/J.APPLTHERMALENG.2018.12.083
Centro
Facultades y escuelas::E.T.S. de Ingenieros Industriales
Departamento
Ingeniería Energética