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ISSN Online: 2379-1748

ISBN Flash Drive: 978-1-56700-469-4

ISBN Online: 978-1-56700-470-0

Second Thermal and Fluids Engineering Conference
April, 2-5, 2017, Las Vegas, NV, USA

ECOLOGICAL OPTIMIZATION OF AN IRREVERSIBLE OTTO CYCLE WITH VARIABLE SPECIFIC HEATS OF WORKING FLUID

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DOI: 10.1615/TFEC2017.fna.018308

Resumo

Considering internal irreversibility loss (IIL), friction loss (FL) and heat transfer loss (HTL), an irreversible Otto cycle model is built up by using air standard (AS) assumption. Based on finite time thermodynamics (FTT), computing entropy generation rate (EGR) by using the irreversible losses in cycle, the ecological function (EF) performance of cycle is optimized when the specific heat (SH) of the working fluid (WF) varies with temperature with linear relation. Some important expressions, including efficiency, power output, EGR and EF, are obtained. Moreover, the effects of variable SH of WF and three losses on cycle performance are investigated. The research conclusion can provide some guidelines for the actual Otto cycle engine performance optimization.