Christoff le Grange Development Director. Entura, Hydro Tasmania

Transcription

1 Christoff le Grange Development Director Entura, Hydro Tasmania

2 Hydro Tasmania s experience with small, mini and micro hydros

3 The island State of Tasmania - separate to mainland Australia Overview Population: 500,000 people. World heritage area: 1.38 million hectares. Figure 1. Tasmanian average annual rainfall distribution

4 The island State of Tasmania - separate to mainland Australia Covers 1% of Australia s landmass. Receives 12% of Australia s annual rainfall. Economic growth and development over the past century has been driven by hydro-industrialisation (forestry, tourism, agriculture, fishing).

5 The facts Government Business Enterprise - owned by the State of Tasmania but operates as a commercial business with a consulting unit (Entura). Australia s largest renewable energy generator: o $5.1 billion worth of assets o MW of hydro-electric capacity in Tasmania o GWh of output in 2009/10.

6 Hydro power Hydro power is the basis of our renewable energy business and expertise (special water licence that provides access to water).

7 Hydro power Almost a century of expertise in power engineering and dam construction, and renewable development. Thirty hydro-electric power stations (60 machines from 1 MW to 165 MW) in an integrated system, more than 50 large dams.

8 Lake Margaret in operation from 1914 Redevelopment of the power station and wooden pipeline ($14.7 million) was completed July Station has installed capacity of 8.6 MW. Provides 50 GWh of additional energy powering around Tasmanian homes.

9 Lake Margaret in operation from 1914 Lower Lake Margaret mini-hydro has also undergone redevelopment. Installed capacity of 3.2 MW or around 22 GWh of extra output.

10 Lake Margaret Power Scheme redevelopment The original Lake Margaret Power Scheme is one of the oldest hydro power schemes in Australia, commissioned in 1914.

11 Lake Margaret Power Scheme redevelopment The Upper Lake Margaret Power Station was decommissioned in 2006, and the downstream lower station in As part of Hydro Tasmania s 1000 GWh program, the upper station was refurbished in 2009 ($14.7m) including construction of a new woodstave pipeline, refurbishing existing machines, dam repairs and communications upgrade.

12 Lake Margaret Power Scheme redevelopment The construction of a new Lower Lake Margaret Power Station commenced in May Project value was over $13m. Works included: o construction of a new woodstave pipeline o construction of a GRP (fibreglass) penstock o installation of a 3.2 MW Turgo mini-hydro machine o Connection asset

13 Lower Lake Margaret construction

14 Tasmania in the National Electricity Market Basslink under sea cable 450V DC. Commissioned April Provides connection to National Electricity Market. 300 MW import, 600 MW export.

15 Moving from base-load system to National Electricity Market Peak generation. Mini-hydro installed for local capacity. Major inter-basin transfers in all catchments.

16 Taking skills to rest of Australia Containerised mini-hydros in Asia-pacific islands and Papua New Guinea. (Entura design)

17 Case study - Melbourne Water Entura has successfully implemented six mini-hydro schemes for Melbourne Water (total of 6.6 MW). Melbourne Water is a large water authority similar in size to Umgeni Water, substantially smaller than Rand Water. Kl supplied pa (millions) Melbourne Water Rand Water Umgeni Water

18 Case study - Melbourne Water Melbourne Water has installed six turbines ranging from 0.4 MW to 1.9 MW. Their primary objective is to reduce the carbon footprint (CO 2 per kilolitre of water produced). o in Australia the feed-in tariff is not attractive relative to cost of electricity, so Melbourne Water uses the electricity themselves rather than selling it.

19 Case study - Melbourne Water Have used it to effectively reduce their carbon footprint.

20 Case study - Melbourne Water The following projects were undertaken entirely by Entura, including feasibility studies, detailed design through to EPC contract: Preston mini-hydro (1.9 MW) Olinda mini-hydro (1.0 MW) Upper Yarra mini-hydro (0.9 MW) Nottinghill mini-hydro (0.4 MW) Mt View mini-hydro (0.5 MW) Silvan mini-hydro (1.9 MW).

21 Melbourne Water s benefits Reduction in carbon footprint: o : Melbourne Water reduced greenhouse gas emissions by 47% o Melbourne Water has the lowest carbon footprint per consumer of all the Australian water authorities. Produces ⅓ of the energy it consumes from its process (hydro and biogas).

22 Case study - Mt Stromlo mini-hydro, ACT A mini-hydro facility constructed on existing 25 km long water supply pipeline from Bendora Dam to Mt Stromlo balance tank: o capturing wasted energy from Canberra s water supply o careful consideration of pressure transients o GreenPower accredited.

23 Case study - Mt Stromlo mini-hydro, ACT Entura undertook feasibility studies on existing assets at Corin, Bendora, Cotter, and Googong dams, and Mt Stromlo pipeline. Entura provided detailed design services (civil, electrical, mechanical and hydraulic) and specialist advice for Mt Stromlo minihydro.

24 Case study - Mt Stromlo mini-hydro, ACT The power station took the place of pressure reducing valves previously used to reduce head from the system prior to discharge to the balance tank. The hydro system is operated from the ACTEW operations centre at Mt Stromlo. A robust bypass system provides a high level of security to the water supply system in the event of failure.

25 Other recent international minihydros East Sepik, Papua New Guinea Wairua, New Zealand Purua, New Zealand Tolukuma, Papua New Guinea Gold Ridge Mine, Solomon Islands Porgera, Papua New Guinea Hubei, China

26 Benefits for Africa Simplicity - containerised or run-of-river systems. Cost effectiveness. Replace diesel - environmentally friendly. Economic growth and development Off the grid: o mining o isolated communities.

27 Thank you. Christoff le Grange - Entura, Hydro Tasmania