Research Article
Nov 1977
Optimal Capacity Expansion with Off-Design Costs
Authors: Charles R. Scherer, AM.ASCE, and Roy ChiulliAuthor Affiliations
Publication: Journal of the Water Resources Planning and Management Division
Volume 103, Issue 2
Abstract
The effect of off-design operating costs on operating and capacity expansion policy is considered for the planning of a water treatment facility. A mixed-integer programming model is presented for minimizing discounted costs of dynamically expanding a reverse-osmosis process that is required to remove increasing levels of salt over time from a brackish stream. Several possible product effluent qualities are considered as variables in the model. Results show the explicit consideration of off-design operating costs can influence capacity expansion planning and reduce actual system costs by a small percentage for desalting facilities. This (apparently small) percentage saving could amount to significant absolute savings in multimillion dollar projects. Analogous percentage savings in other process planning (e.g., municipal water and wastewater treatment, and power generation) could be more or less significant depending on relationship of design to off-design generating costs.
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Information
Published In
Journal of the Water Resources Planning and Management Division
Volume 103 • Issue 2 • November 1977
Pages: 213 - 226
Copyright
© 1977 American Society of Civil Engineers.
History
Published in print: Nov 1977
Published online: Feb 12, 2021
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Authors
Affiliations
Charles R. Scherer, AM.ASCE
Asst. Prof., Dept. of Civ. Engrg., Univ. of California, Berkeley, Calif
Roy Chiulli
Grad. Research Asst., System Sci. Dept., Univ. of California, Los Angeles, Calif
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