Thursday, November 16, 2017

Point Henry Solar?

This is my blog and no-one reads it anyway so why am I keeping it to generic topics?

I've read Alcoa's plan for the Point Henry site and I understand the Geelong council and State Government are also considering similar options for the area. But the area is a combination of salt marsh, protected wet-lands and contaminated soil. I can't really see a residential development being a reasonable use of the land. While, the proposal looks good on paper and housing is generally a high return than most other land uses, I doubt the quality of the homes that could or would be built in that region. It won't even grow trees of any real size and the idea of a lawn is laughable without kilotons of soil being imported - and then washed away. More likely it will end up with a scraggly row of houses such as Avalon Beach - and for much the same reasons.

So what else for Point Henry? Well there are the salt flats there, and a (now) disused Aluminium Smelter, a set of high tension power lines leading out to the Otways, a wetlands on the back side and a single long pier for large ships.
Hmm, salt pans - large flat areas exposed to the sun for most of the day. What modern and growing industry needs large flat areas exposed to the sun? But any intermittent power generator needs a storage mechanism - that is just common sense, as well as being a key recommendation of the Finkel Report. The two most efficient mechanisms are pumped hydro and molten salt. The first requires very UNflat ground - something like the Otway Ranges where Alcoa have their (disused) coal mine, the second requires a facility to manage and work with high temperature materials. And, of course, any power station needs high voltage lines in and out.

So a solar plant sounds like it might at least be plausible. The point might also lend itself to wind or wave power although suitable protection for the wetlands needs to be considered. There has also been talk about geothermal at the other end of the power line which is outside Anglesea. So we have a multi-technology options for both generation and storage.
The downsides? Well, I have no idea if the salt pans are still operational or economically viable and I think the owners might wish to keep them if they are making money. The need for greater power into the grid at Geelong needs to be considered on a cost/benefit basis. The costs and effort in retro-fitting all the necessary equipment, even though some is available, it may actually make more sense to install elsewhere (the geothermal plant didn't go ahead). And last but not least is the impact on the local environment. I think it is isolated enough, but close enough to Geelong that there is not likely to be much backlash from the public but potential other plans for the area need to be considered. A bridge across Corio bay is unlikely still on the cards and it would almost have to leave from Point Henry.
To take the idea further would mean involving Alcoa (obviously), Salt International who I believe own the flats, a Power company - Momentum have a good presence and reputation in the region and have background in renewables, and definitely the City Council.
I suspect the last of those would need to be contacted first, but a reasonable business case would need to be created first, and that involves everyone else.
So how could the basic feasibility of the idea be evaluated - where to start?

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