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Transcript of Alaska Municipal League 59th Annual Local Government Conference The Programs of the Alaska Energy...
Alaska Municipal League 59th Annual Local Government Conference
The Programs of the Alaska Energy Authority
Energy and Empowerment for Your Communities
Rural Power System Upgrade Program and Technical Assistance to Rural Utilities
The Hotel Captain Cook - Anchorage, AlaskaNovember 18-20, 2009
Alaska Energy Authority
Rural Energy Group
Rural Power System Upgradesand
Technical Support
Alan FettersProject Manager
907-771-30001-888-300-8534 toll free
http://www.akenergyauthority.org/
• Alaska Energy Authority (AEA) implements rural power plant construction, renewals, repairs and technical assistance via the Rural Power System Upgrade (RPSU) program
• The program encompasses diesel powerhouses, alternative energy sources and distribution
• The RPSU program is some of the most important work we do at the AEA for rural communities
• The success of this program directly impacts the health, safety, economics and quality of life in rural communities
Alaska Energy Authority RPSU Program
• Every RPSU project is designed to meet the unique needs of each community and take advantage of locally available resources in order to reduce the cost of power
• The RPSU program supports approximately 120 independent rural electric Utilities that are not part of a cooperative like AVEC, AP&T or the North Slope Borough
• Diesel efficiency is one of the core values of this program along with long term reliability and safety
Alaska Energy Authority RPSU Program
Powerhouse Project in Tuluksak
Before
After
Powerhouse Project in Chitina
Before
After
Electrical Distribution in Chignik and Napakiak
Raptor Safe Electrical Distribution
Alternative Energy in Ouzinkie
Alternative Energy in Larsen Bay
Alternative Energy in Pelican
Existing Wooden Flume to be Replaced
Chitina Stream Gauging for Hydro Power
Technical Assistance Fort Yukon
Technical Assistance Fort Yukon
kWh/gal kW 3456 C27250 15.3 11.7300 15.8 12.2350 15.7 12.6400 15.5 12.9
Fort Yukon Engine Selection Analysis
• The previous graph shows the fuel efficiency of a "typical" CAT 3412 genset, a CAT 3456 (500+/-kW) genset and the C27 (619 kW)
• In simple terms, the fuel economy of the C27 is horrendously poor!
• Based on PCE data from FY 2007 to generate 3,123,000 kWh:– it will take approx. 248,000 gallons of fuel using a C27– it will take approx. 201,500 gallons of fuel using a 3456
• Estimated fuel savings of 46,500 gallon /year using the 3456 vs a C27
• The fuel savings in a single year will pay for the purchase and installation of at least 2 each 3456 gensets
Technical Assistance Fort Yukon
Emergency Assistance for Chignik
Cumulative Fuel Savings from RPSU Program
Inside the Typical Powerhouse
Typical Efficiency of an Older Powerhouse
Utility Management
Utility Training
Mechanical
Switchgear Efficiency
Station Efficiency
Engine Efficiency
Public Education
Generator Controls
Organic Rankin Cycle, Hydrogen Injection, Friction Reduction, others
Remote Monitoring and Data Acquisition
Used Oil Blender
Maintenance Increased Facility Efficiency
Water
Water
Water Jacket
Exhaust Stack
Efficiency Gains
Transmission Efficiency
Power Lines
Transformers
Categories
Efficiency Monitoring
Technology Electronic Engine Controller Controller/Monitor Electronic Fuel Injection
Heat Recovery Receptors
Constant Load Monitoring, Automatic Generator Dispatch, coordination with Alt. Energy
Faster Troubleshooting & Power Restoration
Balance Loads, Line Loss Reduction
Efficient Transformers/Properly Sized Automatic Flags/faster response
Troubleshooting Skills
Stack Heat Recovery
Peak Shaving
Comprehensive Maintenance
Voluntary Conservation
Burn Used Oil
New Technology
10-20%
18%
15%
1-2% (Plus Lower O & M Costs)
10-15%
Lower O & M Costs
2-5%
Lower O & M Costs
10-20% Less Demand
Possible Rural Power System Efficiency Upgrades
Potential Efficiency of a New Powerhouse
• With new modern electronically controlled engines, automated paralleling and dispatching switchgear we typically see a 20-25% increase in diesel efficiency or kWh generated per gallon of fuel consumed
• If heat recovery is added to the system there is potential for another 10-15% saving in space heating
• This can equate to a nearly 30-40% in total fuel savings. The payback improves if you consider the reduced maintenance costs associated with a new facility
Alaska Energy Authority
• Routine maintenance and technical support is required to keep these power systems running reliably and efficiently.
• The next graphs convey what can happen to a new powerhouses efficiency without proper opeeration and maintenance
Alaska Energy Authority
Challenges in Maintaining Efficiency
New powerhouse 2000. Suggests inconsistent maintenance, sporadic repairs and generator sets out of service for long periods
Challenges in Maintaining Efficiency
New powerhouse 2003. Suggests low level of maintenance without timely repairs, overall engine efficiency decline and system out of tuned
Training and Routine Maintenance is Important
The RPSU program includes power plant operator training at AVTEC in Seward and training on site during powerhouse construction or renovation
Akiachak Powerhouse
Before
After
• The community of Akiachak has realized efficiency improvements that has resulted in significant fuel savings from an AEA RPSU project completed in the fall of 2008
• AEA partnering with the Denali Commission and the community replaced the old diesel powerhouse with a new modern powerhouse as part of AEA’s Rural RPSU program
• The electric utility is Akiachak Native Community Electric Co.
Akiachak Efficiency Improvements
Akiachak Powerhouse Improvements
The above information was gathered from the Utility’s FY2008 & FY2009 Power Cost Equalization (PCE) reporting
14.62 Avg kWh produced per gallon of fuel consumed in FY2009 after the project
10.62 Avg kWh produced per gallon of fuel consumed in FY2008 before the project
4 kWh per gallon increase in efficiency or 37.6% increase!
165,261 Gallons of fuel consumed at powerhouse in FY2008 before the project
124,555 Gallons of fuel consumed at powerhouse in FY2009 after the project
40,706 Gallons of fuel saved FY 2009 or 25% reduction!
Akiachak Powerhouse Improvements
The above information was gathered from the Utility’s FY2008 & FY2009 Power Cost Equalization (PCE) reporting
$495,142 Cost of fuel consumed at powerhouse in FY2008 before the project
$386,689 Cost of fuel consumed at powerhouse in FY2009 after project
$108,453 Avoided fuel expenditures in FY2009 or 22% savings!
1818 Estimated tons of CO2 from powerhouse in FY2008 before the project
1370 Estimated tons of CO2 from powerhouse in FY2009 after the project
448 Estimated tons of CO2 emission diverted in FY2009 or 25% reduction!
Akiachak Heat Recovery
The above information was gathered from the powerhouse SCADA system and PCE
15,000 Equivalent gallons of fuel saved at the municipal water treatment system in FY2009
$57,900 Estimated avoided cost of fuel in FY2009 at a current cost of $3.86 per gallon
165 Estimated tons CO2 emission diverted in FY2009!
Akiachak Combined Powerhouse & Heat Recovery
Savings from reduced maintenance was not included and the cost of the distribution portion of the project was not removed and would have a positive effect on the payback
55,706 Gallons of fuel saved per year
$215,025 Avoided cost of fuel per year at a cost of $3.86 per gallon
613 Estimated tons of CO2 emissions diverted in FY2009!
$2,700,000 Design and construction cost of new powerhouse and distribution system
12.5 Years estimated simple payback at a the current fuel cost of $3.86 per gallon
Akiachak Powerhouse
RPSU technician training and working with the local Akiakchak operators
Interior of the new powerhouse
• Proper design and construction considering efficiency, reliability and maintainability
• Analyzing the community electrical load and matching it to the proper generators
• Automated paralleling load sensing switchgear with modern a Supervisory Control And Data Acquisition (SCADA) system
• Heat recovery from the new powerhouse to the community’s municipal water system
Factors Contributing to the Efficiency Gains
Automatic Paralleling Load Sensing Switchgear
Remote Monitoring
Supervisory Control and Data Acquisition
Automatic Load Sensing Switchgear
Modern generator control
Waste Oil Injection
Injection waste engine oil back into the fuel
Powerhouse Fire Protection
Fogging water mist system
Heat Recovery & Receptor Equipment
Fuel tank with heat recovery loop to allow
use of #2 fuel in the winter
Heat recovery system is expected to meet all the clinics needs
BTU meter
Remote Monitoring of Heat Recovery
Heat recovery monitoring and metering to the municipal water system
• An important component of the RPSU program is ongoing technical assistance which includes on call technicians and remote monitoring of the powerhouses with a supervisory control and data acquisition system (SCADA)
Alaska Energy Authority RPSU Program
Diesel and Hydro Integration
Remote Monitoring
Camera installation
Satellite connectivity
Remote Monitoring Cameras
Alaska Energy Authority
Rural Energy Group
Rural Power System Upgradesand
Technical Support
Alan FettersProject Manager
907-771-30001-888-300-8534 toll free
http://www.akenergyauthority.org/
Alaska Energy Authority RPSU Program