Comparison Based on Exergetic Analyses of Two Hot Air Engines: A Gamma Type Stirling Engine and an Open Joule Cycle Ericsson Engine

Entropy

Houda Hachem²  Marie Creyx¹  Ramla Gheith²  Eric Delacourt¹  Céline Morin¹  Fethi Aloui¹  Sassi Ben Nasrallah² 

[1] LAMIH, CNRS UMR 8201, Université de Valenciennes et du Hainaut-Cambrésis, Le Mont Houy, 59313 Valenciennes cedex 9, France; E-Mails:;LESTE, Ecole Nationale d’Ingénieurs de Monastir, Université de Monastir, Rue Ibn El Jazzar, Monastir 5019, Tunisia; E-Mails:

关键词: exergy analysis;    exergy fluxes;    exergy destruction;    Stirling and Ericsson hot air engines;   

DOI  :  10.3390/e17117331

来源: mdpi

【 摘 要 】

In this paper, a comparison of exergetic models between two hot air engines (a Gamma type Stirling prototype having a maximum output mechanical power of 500 W and an Ericsson hot air engine with a maximum power of 300 W) is made. Referring to previous energetic analyses, exergetic models are set up in order to quantify the exergy destruction and efficiencies in each type of engine. The repartition of the exergy fluxes in each part of the two engines are determined and represented in Sankey diagrams, using dimensionless exergy fluxes. The results show a similar proportion in both engines of destroyed exergy compared to the exergy flux from the hot source. The compression cylinders generate the highest exergy destruction, whereas the expansion cylinders generate the lowest one. The regenerator of the Stirling engine increases the exergy resource at the inlet of the expansion cylinder, which might be also set up in the Ericsson engine, using a preheater between the exhaust air and the compressed air transferred to the hot heat exchanger.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.