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TECHNICAL PAPERS

Operational Strategy of a Cogeneration System Under a Complex Utility Rate Structure

[+] Author and Article Information
R. Yokoyama, K. Ito

Department of Energy Systems Engineering, Osaka Prefecture University, 1-1, Gakuen-cho, Sakai, Osaka, 593 Japan

J. Energy Resour. Technol 118(4), 256-262 (Dec 01, 1996) (7 pages) doi:10.1115/1.2793871 History: Received January 04, 1996; Revised July 23, 1996; Online November 06, 2007

Abstract

An operational planning problem for a cogeneration system is discussed under a complex utility rate structure which imposes demand charges due to total utility consumption over a specified period as well as demand and energy charges due to hourly utility consumption. Operational strategy of constituent equipment and contract demands for total utility consumption are assessed so as to minimize the operational cost over the period subject to energy demand requirement. This problem is formulated as a large-scale mixed-integer linear programming (MILP) one, and it is solved efficiently by a revised decomposition method for MILP problems with block angular structure. Through a numerical study on a gas engine-driven cogeneration system installed in a hotel or an office building, the effect of rate structure on operational strategy is clarified.

Copyright © 1996 by The American Society of Mechanical Engineers
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