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Self Generation - Olivenhain Case Study

Water District Invests in Clean Power Generation - Pressure Reduction Turbine

Olivenhain Case Study
 

The pressure reduction turbines are one of several projects the district has implemented that have resulted in 100% renewable power for all of our facilities. We have the lowest carbon footprint of any water district in San Diego County.

- Tom Kennedy, OMWD operations manager

T he OMWD found a cost-effective solution to reduce energy costs while furthering its commitment to reducing its environmental impact. In 2013, the district invested in a clean generation technology that produces electricity on-site with no air pollution or greenhouse gas emissions. By installing two pressure reduction turbines, they are now self-producing enough power for half of the plant’s energy needs while saving some $500,000 dollars a year on their utility bills.

The building owners were able to take advantage of the Self-Generation Incentive Program to increase the property’s value, significantly reduce energy consumption and utility costs and eliminate 2,725 tons of greenhouse gas emissions annually.

The water district is using a turbine technology that generates power from the reduction in pressure in water pipelines to convert mechanical energy into electrical energy. A Self-Generation Incentive Program (SGIP) rebate administered by the Center for Sustainable Energy reduced OMWD’s system cost by $625,000, nearly one-third of the total price. The district purchases the remaining 50% of needed electricity directly from a renewable energy service provider.

 
 
 

The water district is using a turbine technology that generates power from the reduction in pressure in water pipelines to convert mechanical energy into electrical energy. A Self-Generation Incentive Program (SGIP) rebate administered by the Center for Sustainable Energy reduced OMWD’s system cost by $625,000, nearly one-third of the total price. The district purchases the remaining 50% of needed electricity directly from a renewable energy service provider.

Canyon Hydro Pressure Reduction Turbines

The pressure reduction turbines, a type of “in-conduit hydropower,” generate power from the high water pressure within the pipes that feed raw water into the treatment plant. The water is directed through valves that press against the blades of a turbine, which powers an electric generator and converts mechanical energy into electrical energy, providing half of the plant’s needs.

 
The District is progressive in their use of pressure reduction turbines to utilize this available energy. Canyon Hydro was pleased to offer our design solutions and participate in this project.

-Brett Bauer, Canyon Hydro

Quick Facts

Site Profile & Costs

David C. McCollom WaterTreatment Plant Supplies 34 million gallons daily to 80,000 customers Escondido, CA (San Diego North County) Built in 2002.

Project Savings

SGIP rebate: $625,000
Projected annual savings: $500,000
Simple Payback: 3.2 years

Specifications

Manufacturer: Canyon Hydro
Make/Model: Francis Turbine
Maximum capacity: 740 kW
Average electrical output: 500 kW
Year installed: 2013

Rebate Savings

Total project cost: $2,237,289
SGIP rebate: $625,000
Post-rebate cost: $1,612,289

 

Did you know?

U.S. energy costs for water treatment facilities amount to $4 billion annually and often account for one-third of a municipality’s total energy bill.