So quite a few issues to address, here goes
Okay,
https://theconversation.com/factcheck-qanda-is-coal-still-cheaper-than-renewables-as-an-energy-source-81263
I'd agree with that article, I think it's fairly balanced and consistent with what I have said, it's actually a good read for people to get their head around the coal vs renewable costs.
Previously I asked you for a source for your claim
In another article, I saw that this technology is one third the cost of gas generation, to put this into comparison against fossil fuels. The sites are all outside national parks etc.
and your source
And how pumped storage in the middle of QLD is cheaper then gas:
http://www.abc.net.au/lateline/content/2016/s4729057.htm
--------- snip ----------
DOMINIQUE SCHWARTZ: Simon Kidson says the hydro scheme will be able to provide six hours of power for 200,000 homes across north Queensland.
SIMON KIDSTON: Coal-fired power is the cheapest power: and that's baseload power. What this project does is turns on or turns off very rapidly. So it really competes with the peaking generators, which are historically gas. And we're a fraction of the cost of gas.
DOMINIQUE SCHWARTZ: A fraction? What sort of fraction?
SIMON KIDSTON: Less than a third.
So, a couple of major fundamental issues here, firstly you are you mentioned "gas generation" he is talking about "peaking gas generation" peaking gas generation is where they generally spend 100's of millions to build a gas-fired power plant that can sit idle for literally 99.99% of the year and just kicks in for the 50-100 hours a year when everyone wants to turn their Aircon on at the same time. So, because you have large outlays, and a very small window for returns the cost per MWh is astronomical.
This example you give could easily be a third of the cost of "peaking gas generation" but not general "gas generation" as claimed.
Secondly, this is a bad example in comparing the "technology" as the site where they are developing it is an exceptionally good site for PWH compared to just about anywhere else. The construction costs they have are minimal due to the fact the reservoirs already exist, as does piping between them and even some transmission lines, this all greatly reduces the time and cost involved
in this instance but isn't indicative of the wider picture.
This gives a good overview:
https://theconversation.com/want-energy-storage-here-are-22-000-sites-for-pumped-hydro-across-australia-84275
Here is a reasonable critique of Andrew Blaker's report which includes a number of major issues with it.
https://www.brightnewworld.org/s/Blakers-et-al-review-gz3p.pdf For the tl;dr, from their conclusion "The confidence they express in the conclusions and their implications in both the document itself and recent media reports is not supported by evidence they provide."
Can you reciprocate and point me to recent article/report outlining the cost benefits of coal Vs renewables?
I can't see where I have ever claimed that so I don't know why you would want me to provide a link to it? I think that it isn't anywhere near as simple as a cost per unit generation comparison anyway, you need to also factor in certainty. For example, wind generation in and of itself might be the cheapest form of generation to
build now (still more expensive than existing coal generation) but unless you only want to use electricity when the wind is blowing you need to factor in storage as well, that then makes it more expensive than its fossil-fueled alternatives.
If coal is equal, we should use renewable energy by default. yes?
If coal and renewables are the same cost for the same level of reliability, of course we should go with renewables. The issue is it's not yet close to the same price when you factor in a reliable system, I know Blaker's has claimed it can be in the near future but if you read the critique of his report, you will see some incorrect assumptions lead to incorrect costings. I am in no way against renewables or pro-coal, just try to be realistic about the situation.
In previous work many years ago I worked on large scale construction, coal mines and a power station and many large construction projects. Yes cost of construction is a factor, but I can't see how pumped storage construction would be larger then building coal powerstations! No way. Pump water up hill and generate down hill, not many moving parts compared to a power station, or coal wash plant and infrastructure.
Just to clarify, I am not for building new power plants, and yes building new coal-fired power plants would be a big job, but just to make sure you are comparing like for like, The Liddell plant that is scheduled for shutdown can produce 2000MW the QLD PWH you linked earlier will produce 250MW but only for 5 hrs a day, That means you would almost need 40 equivalent PWH setup's to produce the same power as the one coal-fired power plant, no small undertaking either.