Douglas County PUD

ASFM Intake Flow Measurements at Wells Dam
Plant size - 840 MW

ASL AQFlow was contracted by PUD No. 1 Douglas County to perform flow measurements in Unit 3 at Wells Hydroelectric Project using the Acoustic Scintillation Flow Meter (ASFM).  The program was carried out to assess the utility of the ASFM for making flow measurements in all the remaining plant units for individual and plant performance optimization. The ASFM had 30 acoustic paths which were mounted on open frames fitted into the stop-log slots.  Each of the three frames had 10 paths.  A comparison was done with a time-of-flight system and Winter-Kennedy pressure taps simultaneously.  The ASFM system was proven successful and a program for flow measurements at the remaining nine units was planned (and carried out) over the following five years:

Dec/03 – March/04
Aug/04 – Nov/04
Aug/05 – Dec/05
July/06 – Nov/06 Back



Douglas County PUD Wells ASFM Diagnostic Measurement

ASL AQFlow Inc. was contracted by the Public Utility District No.1 of Douglas
County (the District) to perform diagnostic measurements at the Wells Hydroelectric Project using the District’s 30-path system Acoustic Scintillation Flow Meter and a 10-path leased system. The program was carried out to: determine the optimum transducer locations for 10 paths per bay, evaluate side-to-side velocity profiles that can produce a flow measurement bias, look at trash rack blockage and to provide further recommendations. The intent was to lay the groundwork for making flow measurements in all turbine units for optimization. The measurements were conducted under the supervision of the District’s consultant Devine Tarbell & Associates, Inc. (DTA) who also took concurrent auxiliary measurements. Forebay elevation, tail race elevation, power, Winter-Kennedy pressure tap, trash rack head loss, wicket gate setting and blade setting measurements were undertaken to confirm operational stability and trash rack condition.

I Back

ASFM measurements at Wells Dam (2004-2006)

On-site measurement supervision services, data analysis and a report for Wells Dam for turbine discharge measurements was carried out as a continuation of services by ASL AQFlow for Douglas County PUD #1that has been carried out each year at different units since 2002.

Client	Project/ Year
Electricité de France	Pinet 2007
	Cusset 2007
	La Rance 2007
	Sisteron 2007
	Kembs - 2006
Douglas County PUD	Wells 2002,2004,2005,2006
Korea Water Resources Corp.	Namgang 2006
	Yongdam 2005
Hydro Québec	Rocher-de-Grand-Mère 2006
	La Grande 1, 2003
	Outardes II, 2002
	Rapides des Quinze, 2002
	Coteau Rapids Spillway, 2000
	Les Cèdres, 2000
	Laforge-2 - 1997
Portland General Electric	TW Sullivan - 2005
Edison Sault Electric Company	2004
US Army Corps of Engineers	Lower Granite - 1995, 2004
	Little Goose - 2003
	Lower Monumental - 2002
	John Day - 2002
	The Dalles - 2000, 2001
	Bonneville - 1998, 1999, 2000
	McNary - 1998, 1999
Hydro Kennebec	2003
Nova Scotia Power	Hells Gate 2002
	Deep Brook - 2001
BC Hydro	Stave Falls - 2000
	Revelstoke - 1996
Chelan County PUD	Rocky Reach - 1992, 1993, 2000
	Rock Island- 2000
Swed Power, Sweden	Mellanfallet - 1999
Manitoba Hydro	Seven Sisters 1999
Tennessee Valley Authority	Wheeler - 1999
	Fort Patrick Henry - 1997

Note:

While the first measurement by a particular owner is typically carried out by AQFlow technical personnel, the user-friendly features of the ASFM offer the owners the choice of having the subsequent measurements carried out by AQFlow personnel (indicated above in italics) or by their own personnel (indicated by non-italics).

As shown, Nova Scotia Power, Hydro Québec, Korea Water Resources and Electricité de France have all opted for having their personnel trained by AQFlow technicians as part of the first project, purchasing the ASFM and performing all subsequent measurements in-house successfully and cost-effectively.