Rebuilding A 70-YearOld Rural. Alaska Hydro. David Lockard AEA

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1 Pelican Hydro Upgrade: Rebuilding A 70-YearOld Rural Alaska Hydro David Lockard AEA

2 The Pelican Boardwal k

3 Pelican Background and History Located on the NW side of Chichagof Island, SE Alaska 100 miles west of Juneau Access by boat and seaplane only No runway Founded as a commercial fish processing site in 1938 Closest to the fish One million pounds of fish processed and frozen in 1942 More history and photos at Pelican.net

4 Original Tank Farm (This is why we came to Pelican)

5 New Tank Farm (Denali Comm. Funding )

6 Bulk Fuel Upgrade Completed in 2008

7 Diesel Powerhous e Upgrade Completed in 2008 Denali Comm. Funding (920 kw, $1,971,000

8 Denali Commissio n Staff in new Powerhous e

9 Pelican Hydro Upgrade Funding Summary 2004 Denali Commission Grant, $1,350, Denali Commission grant, $2,274, State Match $300,000 RE Fund Grant for $1,896,836 Awarded In 2011 Total: $5,820,836

10 1940 s Dam During Construction

11 1940 s Wood Crib Dam

12 1984 Barber Turbine and Flywheel (550 kw)

13 Pelican Lake At High Water

14 1940 s Woodstave Penstock With Blue Tarp

15 1984 Hydro Equipmen t

16 1984 Cornell Pump, Induction Motor/ Generator (100 kw)

17 1984 Switchge ar

18 May 2004 Site Visit to Plan Projects

19 Flume Failure In 2009

20 Existing Dam During Demolition

21 Cofferda m and Spillway

22 Intake Under Constructio n

23 Pumping Out The Cofferda m

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25 Rebuilt 600kW Barber Turbine and 600kW 900rpm Kato Generator Installed 2010

26 Wing Wall Under Constructio n

27 Hydro Powerhouse Switchgear and Controls Upgrades: Upgrade existing switchgear with new PLC with turbine governor control algorithm and additional control algorithms to monitor and control other plant functions including: reservoir level sensor; remote control of dam site video cameras, lights and trash rack; both hydroelectric generator breaker positions; the turbine main bearing lubrication and water cooling systems; remote electric boiler dispatch; and other inputs that may be

28 Turbine Governor Replacement: Replace existing mechanical/hydraulic Woodward UGHT turbine governor with an electro-hydraulic control interface. Install new electronic distributing valve with servo amp for digital governor interface. Install new hydraulic actuator with shut-down logic and flow control. Replace existing mechanical restoring device with electronic servomotor position indication. Install new hydraulic system including servomotor, hydraulic pressure system, pumps, accumulator and dual hydraulic oil filtration system. Replace all mechanical linkages between governor actuator and wicket gate.

29 Fiber Optic Data Communication Cable: Communication between the diesel plant PLC and the hydro plant PLC will be provided by a new single-mode fiber optic link. Install Figure 8 6-pair fiber optic cable on existing overhead distribution system poles between the diesel power plant and the hydroelectric powerhouse (approximately 3,000 feet total length). Electric Boilers: A dispatchable electric boiler will be installed at the Pelican School complex to allow excess hydroelectric power generation (above community demand) to displace diesel fuel use for space and domestic water heating.

30 600kW, 900RPM Kato Generator Refurbishment: Uncouple, disconnect and remove generator end from powerhouse. Package and ship out for refurbishment. Reinstall upon return of unit. 550kW Barber Turbine Refurbishment: Perform complete unit tear down and rebuild. Remove wicket gate assembly, dress or replace gates as required, replace stem bushing o-rings, seal plate seals, seal plate o-rings, and seal plate bolts. Adjust or replace all BLOC clutch assemblies as required. Clean and re-bush wicket gate fixed levers. Clean and re-bush transfer levers. Install new linkage pins. Refurbish or replace regulating ring. Clean regulating ring holders, inspect bearing surfaces and install new bolts. Replace the link shaft between the regulating ring and the intermediate shaft, including new rod end bearings. Clean servomotor link and replace bronze bushing. Remove runner from shaft, dress surfaces as required. Inspect shaft bearing surfaces and machine as required. Install new mechanical shaft seal and sleeve. Replace main bearings and seals. Install new oil cooling system on main radial-thrust bearing, including pump/reservoir, tubing and fan unit. 100kW Cornell Induction Pump Refurbishment: Replace mechanical shaft seal and sleeve. Replace main bearings and seals. Remove impeller, dress or replace as required

31 Planned and Potential Benefits of Hydro in Pelican Electric boiler at school Electric heat for water plant building and circulating water system Ice machines for commercial and sport fishing (grant-funded, producing installed in 2012, producing ice in 2013) Electric heat for City buildings Electric vehicles Commercial and interruptible electric rates Potential for re-newed and additional fish processing and freezing

32 Hydro Runnin g