@article{MAKHILLJEAS20127813357,
    title = {Performance Analysis of an Irreversible Dual Cycle Based on an Ecological Coefficient of Performance Criterion},
    journal = {Journal of Engineering and Applied Sciences},
    volume = {7},
    number = {8},
    pages = {462-467},
    year = {2012},
    issn = {1816-949x},
    doi = {jeasci.2012.462.467},
    url = {https://makhillpublications.co/view-article.php?issn=1816-949x&doi=jeasci.2012.462.467},
    author = {Mohamad Hashemi,Mohsen Nasiri and},
    keywords = {Ecological coefficient,dual cycle,internal irreversibility,finite-time processes,design,Iran},
    abstract = {The effects of compression, cut-off and pressure ratios on the 
  performance of a dual cycle during the finite-time thermodynamic are investigated. 
  In the model, the linear relation between the specific heat ratio of the working 
  fluid and its temperature, the friction loss computed according to the mean 
  velocity of the piston and the heat transfer loss are considered. The relations 
  between thermal efficiency and compression ratio and between an Ecological Coefficient 
  of Performance (ECOP) and compression ratio are derived. Moreover, the effects 
  of cut-off and pressure ratios on the cycle performance are analyzed. The results 
  show that the cut-off and pressure ratios are more effective on performance 
  of a dual engine. Also, the points of maximum ECOP and thermal efficiency of 
  dual cycle will decreases with an increase of cut-off and pressure ratios. The 
  results are of importance to provide good guidance for the performance evaluation, 
  improvement and design of practical dual engines.}
    }