Bendigo Mine Workings Pumped Hydro Renewable Energy Storage

Transcription

1 Bendigo Mine Workings Pumped Hydro Renewable Energy Storage Chris Corr 12 August

2 BSG Vision Repower Bendigo with: 100% renewably generated energy 100% community owned energy Keep money and benefits local

3 Bendigo Electorate Rooftop Solar 8,500 systems 20% of households 30 MW installed capacity

4 BSG Renewable Energy Examples 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

5 Bendigo s Energy Needs Min power Max power Annual use Annual spend MW (overnight) MW (hot summer day) 550 GWh $ million???

6 Requirements for Energy Storage 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

7 Pumped Hydro Storage 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

8 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

9 Bendigo Mine Workings

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11 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

12 Pump ~2.5 ML/d to Epsom for treatment Collection & Delivery of Water Collect all reefs into Garden Gully Reef All reefs Refer: DELWP; 2015; Managing groundwater from Bendigo s mines; (JACOB s Report) data/as sets/pdf_file/0009/297855/managi ng-groundwater-from-bendigosmines-technical-report.pdf

13 Time - Standby Pumping Power Used ~30m ~250m or more Generation Power Recovered Reef Workings with Deep Groundwater Level Reef Workings with Shallow Groundwater Level

14 Day - Charging Pumping Power Used ~30m ~250m or more Generation Power Recovered Reef Workings with Deep Groundwater Level Reef Workings with Shallow Groundwater Level

15 Night - Generating Pumping Power Used ~30m ~250m or more Generation Power Recovered Reef Workings with Deep Groundwater Level Reef Workings with Shallow Groundwater Level

16 Pumped Hydro Standby Pumping water up to: - Garden Gully Reef - New Chum South reef

17 Pumped Hydro Re-Charging Pumping water up to: - Garden Gully Reef - New Chum South reef

18 Pumped Hydro Generating Releasing water down to: - Sheepshead Reef - Deborah Reef - Hustlers Reef

19 230 Mine Water Levels mahd m head Current

20 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

21 230 Mine Water Levels Deeper mahd m head 500m head

22 Kidston PH QLD (270 km north west Townsville) Average operating head Instantaneous generation Running time Energy storage Estimated Cost 190 metres 250 MW 6 hours 1,500 MWh $282 million ($0.2m/MWh)

23 Potential Energy Storage Snowy 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)

24 CORE Future Community owned renewable energy Community Power Hub Big and Small projects Solar Rooftops Small Solar Farms (1 5 MW)

25 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

26 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

27 Potential Stakeholders

28 Thanks for listening Questions?