TY  - JOUR
T1  - Performance Analysis of an Irreversible Dual Cycle Based on an Ecological Coefficient of Performance Criterion
AU - Gahruei, Mohamad Hashemi AU - Solukluo, Mohsen Nasiri AU - Vahidi, Saeed 
JO  - Journal of Engineering and Applied Sciences
VL  - 7
IS  - 8
SP  - 462
EP  - 467
PY  - 2012
DA  - 2001/08/19
SN  - 1816-949x
DO  - jeasci.2012.462.467
UR  - https://makhillpublications.co/view-article.php?doi=jeasci.2012.462.467
KW  - Ecological coefficient
KW  -dual cycle
KW  -internal irreversibility
KW  -finite-time processes
KW  -design
KW  -Iran
AB  - 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.
ER  -