Finite Time Thermodynamics Analysis of Power and Efficiency Characteristic of the Universal Irreversible Reciprocating Heat Engines
Hemant B. Mehtaa and Omprakash S. Bhartib
Mechanical Engineering Department, Sardar Vallabhbhai National Institute of Technology, Surat 395 007, Gujarat, India.
ahbm@med.svnit.ac.in
bomprakash.bharti2006@gmail.com
ABSTRACT
In this paper, power and efficiency characteristic performance of the different irreversible heat engines are analyzed using finite-time thermodynamics (FTT). In the irreversible cycle model, the friction loss computed according to the mean velocity of the piston, the heat-transfer loss and the heat loss due to combustion. The relations between the power output and the compression ratio, between the thermal efficiency and the compression ratio, the optimal relation between the net power output and the efficiency of the cycle, are indicated by numerical example. The results obtained herein include the performance characteristics of irreversible reciprocating Diesel, Otto, Atkinson, Brayton and Dual cycles.
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