Reynolds-number-dependent efficiency characterization of a micro-scale centrifugal compressor using non-conventional working fluids

Valdés del Fresno, Manuel; Sebastián Herrera, Andrés y Abbas Cámara, Rubén (2018). Reynolds-number-dependent efficiency characterization of a micro-scale centrifugal compressor using non-conventional working fluids. "Energy Conversion and Management" (n. 177); pp. 224-232. ISSN 0196-8904. https://doi.org/10.1016/j.enconman.2018.09.055.

Descripción

Título: Reynolds-number-dependent efficiency characterization of a micro-scale centrifugal compressor using non-conventional working fluids
Autor/es:
  • Valdés del Fresno, Manuel
  • Sebastián Herrera, Andrés
  • Abbas Cámara, Rubén
Tipo de Documento: Artículo
Título de Revista/Publicación: Energy Conversion and Management
Fecha: 1 Diciembre 2018
Materias:
Palabras Clave Informales: Micro-scale compressor; Turbomachinery down-sizing; Low Reynolds-number; Non-conventional fluids; Reynolds-number effects
Escuela: E.T.S.I. Industriales (UPM)
Departamento: Ingeniería Energética
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

The selection of working fluids other than air is a key issue in improving the efficiency of new thermodynamic cycles intended for low-to-moderate temperature small power plants. The aim of this paper is to study whether the low efficiency typical of small turbomachinery is still a problem when using alternative fluids. Based on a new design of power cycles named balanced hybrid Rankine-Brayton cycles, five different fluids were selected as potential working fluids: carbon dioxide, propane, isobutane, pentafluoroethane and sulfur hexafluoride. Dimensional analysis was used to compare the performances of a micro-scale centrifugal compressor working in homologous points where the efficiency variation depends only on the Reynolds-number (Re). The influence of Re on efficiency was calculated by means of four different methods for comparative purposes. Numerical simulations were also carried out in order to validate the methodological approach proposed. The results show the efficiency variations as a function of Re for increasing fluid densities. All the non-conventional fluids studied provide better performance in terms of efficiency than air. Particularly, isobutane and propane have been identified as potential working fluids candidates for the aforementioned innovative power cycle.

Proyectos asociados

TipoCódigoAcrónimoResponsableTítulo
Gobierno de EspañaENE2015-70515-C2-2-RSin especificarSin especificarDISEÑO Y EVALUACION DE EQUIPOS DE CICLOS COMBINADOS SOLARES AVANZADOS

Más información

ID de Registro: 53119
Identificador DC: http://oa.upm.es/53119/
Identificador OAI: oai:oa.upm.es:53119
Identificador DOI: 10.1016/j.enconman.2018.09.055
URL Oficial: https://www.sciencedirect.com/science/article/pii/S0196890418310574?via%3Dihub
Depositado por: Memoria Investigacion
Depositado el: 03 Dic 2018 16:05
Ultima Modificación: 03 Dic 2018 16:05
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