0
TECHNICAL PAPERS: Gas Turbines: Industrial and Cogeneration

Optimal Design of Gas Turbine Cogeneration Plants in Consideration of Discreteness of Equipment Capabilities

[+] Author and Article Information
Ryohei Yokoyama1

Department of Mechanical Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Sakai, Osaka 599-8531, Japanyokoyama@ese.me.osakafu-u.ac.jp

Koichi Ito

Department of Mechanical Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Sakai, Osaka 599-8531, Japan

1

To whom correspondence should be addressed.

J. Eng. Gas Turbines Power 128(2), 336-343 (Mar 01, 2004) (8 pages) doi:10.1115/1.2131889 History: Received October 01, 2003; Revised March 01, 2004

To attain the highest economic and energy-saving characteristics of gas turbine cogeneration plants, it is necessary to rationally determine capacities and numbers of gas turbines and auxiliary equipment in consideration of their operational strategies corresponding to seasonal and hourly variations in energy demands. Some optimization approaches based on the mixed-integer linear programing have been proposed to this design problem. However, equipment capacities have been treated as continuous variables, and correspondingly, performance characteristics and capital costs of equipment have been assumed to be continuous functions with respect to their capacities. This is because if equipment capacities are treated discretely, the number of integer variables increases drastically and the problem becomes too difficult to solve. As a result, the treatment of equipment capacities as continuous variables causes discrepancies between existing and optimized values of capacities and expresses the dependence of performance characteristics and capital costs on capacities with worse approximations. In this paper, an optimal design method is proposed in consideration of discreteness of equipment capacities. A formulation for keeping the number of integer variables as small as possible is presented to solve the optimal design problem easily. This method is applied to the design of a gas turbine cogeneration plant, and its validity and effectiveness are clarified.

FIGURES IN THIS ARTICLE
<>
Copyright © 2006 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Concept of superstructure

Grahic Jump Location
Figure 2

Hierarchical relationship between design and operation variables

Grahic Jump Location
Figure 3

Energy supply plant with simple superstructure

Grahic Jump Location
Figure 4

Modeling of performance characteristics of equipment

Grahic Jump Location
Figure 5

Superstructure of gas turbine cogeneration plant

Grahic Jump Location
Figure 6

Performance characteristics of gas turbine cogeneration units: (a) approximated values of all candidates and (b) comparison of cataloged and approximated values of some candidates

Grahic Jump Location
Figure 7

Optimal operational strategies for plant A: (a) electricity supply, (b) steam supply, and (c) cold water supply

Grahic Jump Location
Figure 8

Optimal operational strategies for plant B: (a) electricity supply, (b) steam supply, and (c) cold water supply

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In