Embed Size (px)
Citation preview
Bendigo Mine
Workings
Pumped Hydro
Renewable Energy Storage
Chris Corr
12 August 2017
www.bsg.org.au
BSG Vision
• Repower Bendigo with:
– 100% renewably generated energy
– 100% community owned energy
• Keep money and
benefits local
Bendigo Electorate Rooftop Solar
• 8,500 systems
• 20% of households
• 30 MW installed capacity
BSG Renewable Energy Examples
www.bsg.org.au
• Community owned renewable energy
• Local BSG led projects
– Bendigo Library 20 kW crowd funded
– Discovery Centre 11 kW crowd funded
– Bendigo Tramways 50 kW CFCV funded
– Bendigo Archives 30 kW BSG funded
• Consultancies for other council / organisation
buildings
Bendigo’s Energy Needs
• Min power 15 – 20 MW (overnight)
• Max power 55 – 60 MW (hot summer day)
• Annual use 550 GWh
• Annual spend $120 - 150+ million???
Requirements for Energy Storage
www.bsg.org.au
• Solar Thermal
• Batteries
– Costs reducing rapidly
– Interest and installations taking off
• Pumped Hydro
– presently 97% of Worlds stored dispatchable
energy for electrical power
– None in Australia for last 40 years
Pumped Hydro Storage
www.bsg.org.au
• Water supply
• Top & Bottom storages
with
elevation difference between
• Infrastructure
– Water transfer
– Generating / pumping
• Power Supply Connection
to demand
• Typical run time 4 to 6 hours
Bendigo Mine Workings
• 150 year gold mining history
• Greatest concentration of deep shafts in World
– over 5,000 shafts sunk under Bendigo
• Some shafts over 1 km deep
– deepest 1,406 metres
• Hundreds of kilometres of tunnels
Bendigo Mine Workings
Bendigo Mine Groundwater
• Gold mining ceased in last five years
– Pumping and treatment of groundwater ceased
• Groundwater has risen creating issues
– Central Deborah tourist mine pumping water
– Victorian Government interim treatment solution ($30m)
• Pumped Hydro is independent of the groundwater
issue but likely complimentary
Collection
& Delivery
of Water
All reefs
Refer: DELWP; 2015; Managing
groundwater from Bendigo’s
mines; (JACOB’s Report)
http://delwp.vic.gov.au/__data/as
sets/pdf_file/0009/297855/Managi
ng-groundwater-from-Bendigos-
mines-Technical-report.pdf
Collect all reefs
into Garden
Gully Reef
Pump ~2.5 ML/d to
Epsom for treatment
~250m
or more
~30m
Reef Workings
with Deep
Groundwater Level
Reef Workings
with Shallow
Groundwater Level
PumpingPower Used
GenerationPower
Recovered
Time - Standby
~250m
or more
~30m
Reef Workings
with Deep
Groundwater Level
Reef Workings
with Shallow
Groundwater Level
PumpingPower Used
GenerationPower
Recovered
Day - Charging
~250m
or more
~30m
Reef Workings
with Deep
Groundwater Level
Reef Workings
with Shallow
Groundwater Level
PumpingPower Used
GenerationPower
Recovered
Night - Generating
Pumped Hydro
Standby
Pumping water up to:
- Garden Gully Reef
- New Chum South reef
Pumped Hydro
Re-Charging
Pumping water up to:
- Garden Gully Reef
- New Chum South reef
Pumped Hydro
Generating
Releasing water down to:
- Sheepshead Reef
- Deborah Reef
- Hustlers Reef
Mine
Water
Levels
Current
0
230
-40
-280
mAHD
240mhead
Potential Energy Storage
• Energy Storage Capacity?
– 5 MW / 40 MWh - Kangaroo Flat incline
– Potentially much more over multiple distributed sites (if feasible)
– Replicable / stageable
• finance / cost / renewable energy generation
• Potential (values yet to be determined with confidence)
– Storage in excess of: 800 MWh
– Instantaneous generation: 20 MW+
– Long run times: 40 hours
www.bsg.org.au
Mine
Water
Levels
Deeper
0
230
-40
-280
mAHD
240mhead
500mhead
Kidston PH QLD (270 km north west Townsville)
• Average operating head 190 metres
• Instantaneous generation 250 MW
• Running time 6 hours
• Energy storage 1,500 MWh
• Estimated Cost $282 million ($0.2m/MWh)
Potential Energy Storage
• Snowy 2.0 7-10 years $300 /kWh
• Batteries 1 year $600 / kWh
• Bgo Pumped Hydro ? years $? / kWh
• SA - 100 MW / 123 MWh battery cost approx $75 m
• Bendigo Pumped Hydro – costs and capacity presently unknown but battery $ equivalent if: – 50 MWh $28 million
– 100 MWh $57 million
– 200 MWh $114 million
– 400 MWh $228 million
– 800 MWh $455 million ($150m at Kidston cost)
CORE Future
www.bsg.org.au
• Community owned renewable energy
• Community Power Hub
• Big and Small projects
– Solar Rooftops
– Small Solar Farms (1 – 5 MW)
Funding & Community Involvement
• Required storage for larger solar / wind farms
across region
• Community ownership / Governance
• Community long-term benefit
• Enables Bendigo to be 100% renewably
powered in near to medium term future
www.bsg.org.au
Pumped Hydro - Next Steps
• Feasibility Study�Consultancy � Optimal solution
• Management of Study�Small Representative Group Overseeing
� Independence, Community based
• Cost Estimates (NPV over 25 years)
• Funding Model�Capital input
�Ongoing Running Costs & Funding
www.bsg.org.au
Potential Stakeholders
www.bsg.org.au
Thanks for listening
Questions?
www.bsg.org.au
