Optimatics/Frey applying optimization technique in City of Toronto/Region of York water supply study

Frey Water Engineering, Inc. and its Australian partner, Optimatics Pty Ltd., have been awarded a contract to apply optimization analysis to an integrated water supply system model for the City of Toronto and Region of York.

Feb. 27, 2001—Frey Water Engineering, Inc. and its Australian partner, Optimatics Pty Ltd., have been awarded a contract to apply optimization analysis to an integrated water supply system model for the City of Toronto and Region of York. Optimatics/Frey is acting as Optimization Consultant to Earth Tech Canada Inc., the lead consultant on the Toronto/York Water Supply Joint Optimization Study (JOS).

The purpose of the JOS is to determine the infrastructure required to meet long-term water demands within the City of Toronto and a portion of the Region of York. Various demand scenarios for years 2011 and 2031 will be analyzed to establish the most cost-effective infrastructure and to facilitate the basis for cost sharing between Toronto and Region of York.

Once Earth Tech Canada develops the integrated hydraulic model, Optimatics/Frey will apply its Optimatics genetic algorithm (OGA) technique to identify several feasible near-optimal improvement plans for each scenario. The OGA will minimize project life cycle costs by optimizing the balance between needed capital improvement costs and lifetime pumping energy and water production and purchase costs. Security of supply and operational flexibility issues will also be considered.

The City of Toronto and the Region of York are keen to identify their respective capital works programs based on a formal optimization analysis. Applying GA optimization to this complex study should achieve capital cost savings of millions of dollars in comparison to a simulation-only solution that relies on engineering judgment and trial-and-error.

The GA technique formulates and evaluates hundreds of thousands of trial solutions as a guided computer search narrows in on the best alternatives that meet all specified design and performance criteria.

System hydraulic performance improvements will also be identified as the GA optimizes system operations under maximum day and emergency conditions.

Optimatics (Adelaide, Australia) and Frey Water Engineering (Arlington Heights, Illinois) have partnered on numerous distribution system optimization studies over the past six years. Optimatics' founding staff are the original developers of genetic algorithm pipe network optimization starting in 1990 at Adelaide University in Australia. Frey Water Engineering has represented Optimatics in North America since 1995.

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