Improving steam power plant efficiency through exergy analysis: effects of altering excess combustion air and stack-gas temperature
by Marc A. Rosen, Raymond Tang
International Journal of Exergy (IJEX), Vol. 5, No. 1, 2008

Abstract: Modifications are examined to increase coal-fired steam power plant efficiency by reducing irreversibilities in the steam generator, including decreasing the fraction of excess combustion air, and/or the stack-gas temperature. Overall-plant energy and exergy efficiencies both increase by 1.4% when the fraction of excess combustion air decreases from 0.4 to 0.15, and by 3.5% when the stack-gas temperature decreases from 149°C to 87°C. When both decreases occur, plant energy and exergy efficiencies both increase by 4.1%. If theoretical combustion air is used, the plant energy and exergy efficiencies both increase by 4.7% when the stack-gas temperature is 87°C.

Online publication date: Sun, 02-Dec-2007

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

 
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
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:

Username:        Password:          Forgotten your 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