First- and second-law analyses of thermal power plants in connection with irreversibility ratio Online publication date: Fri, 06-Nov-2015
by Ahmet Z. Sahin; Bekir S. Yilbas
International Journal of Exergy (IJEX), Vol. 18, No. 3, 2015
Abstract: The rigorous assessment of thermal characteristics of power plants is important for the cost-effective operations. Thermodynamic analysis of the first- and the second-law efficiencies can be merged through the irreversibility ratio (IR = T0S˙gen/Q˙H), which provides useful information on the thermal system characteristics and reduces the efforts for the thermal analysis. In this study, thermodynamic analysis of a power plant is carried out and the first- and the second-law efficiencies are formulated simultaneously incorporating the irreversibility ratio. The maximum output power and the maximum first- and second-law efficiencies are formulated. The effect of temperature ratio and irreversibility ratio on the output power as well as the first- and the second-law efficiencies is investigated. It is found that the influence of the irreversibility ratio is higher on the second-law efficiency than that of the first-law efficiency, which is more pronounced at low values of the temperature ratio (θ ≤ 0.6).
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Exergy (IJEX):
Login with your Inderscience username and password:
Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.
If you still need assistance, please email subs@inderscience.com
Our Blog 
Follow us on Twitter 
Visit us on Facebook