Farmers Irrigation District

Oregon, USA

Gilkes were extremely honoured when the Farmers Irrigation District (FID) sourced them to completely upgrade their existing plant, and to change the turbine technology being employed. The plant’s original configuration consisted of two dissimilar sized Francis turbines of a mid-1980’s vintage. The configuration made sense when looking at one aspect of the project, which was the peak energy production based on the head and flow conditions. With the Francis technology however, they were limited to certain flow ranges and were unable to recover some of the lower flows they experience during the irrigation months of April to October. There was one other key area that plagued the project for many years which was the sediment-laden water due to the minerals from their watershed which is delivered from the North East Slope of Mount Hood.

Gilkes engineers quickly got to work to thoroughly evaluate every aspect of the project, and to openly discuss all of the available technologies with FID. Through our analysis, we determined that a Gilkes Turgo turbine would be the best-suited machine for the site conditions, as well as for the overall annual energy production.

The Gilkes Turgo, was the perfect match as it was able to capture the flows that FID were currently unable to use. More importantly the Turgo’s ability to efficiently and effectively handle ‘aggressive’ water would significantly reduce the owner’s annual operation and maintenance expenditures. All of these factors combined made the decision for the turbine technology to be a Turgo turbine as opposed to Francis turbine technology. Each have their place for various site conditions, and in this case the Turgo was by far the logical choice.

SCOPE OF SUPPLY

  • Gilkes 31” High Capacity Twin Jet Turgo Impulse Turbine
  • Valve - 36” Ball Valve, PN16
  • Generator - 3,310 KVA, 60hz, 3 Phase, 4160V, 600rpm, with hydrodynamic, babitted sleeve bearings
  • Generator Controls & Switchgear - PLC based fully automated controls, Turbine Governor, Electrical Protection System, Station Services, DC Battery Back-Up System, MCC, and Generator Switchgear
  • Hydraulic Control Module
  • Installation & Commissioning
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Key Stats

  • Commissioned August 2015
  • Power 2.6MW
  • Net Head 352 ft
  • Flow 108 cfs
  • Turbine Type HCTI Twin Jet Turgo

The project was delivered on-time, on-budget, and ahead of schedule which allowed FID to begin generating earlier than planned and assisted them with their annual generation targets and project pay-back.

Jerry Bryan, FID’s former District Manager and Project Manager for this project comments; “After our long struggle with an ancient, low-bid turbine-generator scheme that many times over the past thirty years threatened to drag
the Farmers Irrigation District into bankruptcy, our new Gilkes Turgo turbine is music to our ears"

“Gilkes is the exact company it rightfully claims to be -- a collective group of highly professional, relationship-based, sophisticated, genuine, and friendly people dedicated to a common goal of excellence. Best of all, even though we set the bar very high, every single last one of you working at the Gilkes exceeded our expectations.”

“Our new Gilkes Turgo unit is producing green, renewable electrons in excess of the Gilkes’ guaranteed efficiencies, and we know that our new system will operate reliably and efficiently for decades to come.”