There hasn't been any commercial tidal power development in Australia thus far (although experiments are underway in Tasmania), but the Kimberly region has long been a target for would be developers of tidal power projects for many years, due to its enormous potential (a tidal range of 11 metres).

Thus far all of the proposed projects have been stymied by the remoteness of the location from the Western Australian and national electricity grids and by environmental concerns. A number of possible sites have been identified, including Secure Bay, Walcott Inlet, George Water and St. George's Basin.

Tuckey has long been the most vocal supporter of a Kimberly tidal project, pointing out if a link was built to the eastern states grid (thus creating a truly national power grid) it would obviate the need for any consideration of nuclear power. Some Kimberly tidal power advocates have also tried to base the idea of a "hydrogen economy" on the resource, though this seems a lot more far-fetched than a grid link.

A link to the grid could also potentially include large scale CSP solar in the western australian deserts, which are one of the best solar resources in the world, along with geothermal power in central Australia and perhaps coal seam gas developments in Queensland.

It is far from clear that Kimberly tidal would be economically competitive with solar thermal plants in the desert, but it will be interesting to see if the upcoming government report explores the concept, including financials, in any depth. Mixing large scale tidal power from the north, solar and geothermal from the centre, biogas and biomass from the east and wind and waves from the south would provide the sort of geographical and source diversity required to run a national grid powered completely by clean energy sources - which is a leap the nation will need to make in the coming years.

Looking across the ditch, there is an attempt to create a tidal power pilot project in the Cook Strait.

A project to generate power from tidal turbines in Cook Strait expects to have a pilot programme underway by 2011. Christchurch scientists David Beach and Chris Bathurst are applying for Government funding this month and also hope to secure private investor funds to enable a turbine to be built and placed 90m deep off Sinclair Head on Wellington's south coast. ... Cook Strait was one of the most exceptional sources of tidal energy in the world because of the depth and width of the waterway, Mr Beach said. The 23km wide channel reaches 250m at its deepest.

And up in the UK, interest in tidal power continues to grow, with the BBC reporting on a new survey of tidal power sites.

A survey of the potential of the Pentland Firth and the sea around the Orkney islands to generate energy from tidal devices is to be carried out. Development agency Highlands and Islands Enterprise (HIE) is funding the work by Stromness-based company Aquatera. HIE said the results would fill gaps in what was already known about the areas.

The Pentland Firth is the first UK marine site to be opened up for commercial-scale development. The Crown Estate has invited applications from developers to run marine energy projects in the firth. HIE confirmed last month it had carried out discussions with tidal power developer Atlantis Resources Corporation about a proposed computer data centre in Caithness supplied by renewable energy.

Cross-posted from Peak Energy.