The Coober Pedy hybrid wind-solar-diesel plant, a clone of the King Island plant discussed in this recent post, achieved 68% renewables generation in its first year of operation and is expected to achieve around 70% for the rest of its operating life. According to Energy Developments (EnGen), the plant’s owner, this “demonstrates the credibility and reliability of renewable hybrid energy systems for off-grid communities and mine sites”. This is questionable. The $38.9 million* Coober Pedy plant is heavily subsidized, saves a negligible fraction of Australia’s CO2 emissions (at an unsubsidized cost of hundreds of dollars/ton CO2), will not lower electricity bills and requires that the existing diesel units be left in place as backup. One has to question whether Coober Pedy and other similar “hybrid” plants currently under development in Australia are worth the expense. (Inset: Coober Pedy golf club).
*All monetary values in this post are in Australian dollars. Conversion factors relative to the 2016-2017 construction period are 0.75 for US dollars and 0.62 for Euros.
Background:
Coober Pedy, 2016 population 1,762, is an “electricity island” with no grid connections to the rest of Australia. Its ~12 GWh/year electricity consumption (peak load is around 3 MW) has historically been filled by eight diesel units owned and operated by EnGen and aggregating 3.9MW. Figure 1 is a location map and Figure 2 an aerial view of the town, which is renowned as the world capital of opal mining:
Figure 1: Coober Pedy location map
Figure 2: Aerial view of town
In 2013 Engen began to explore the possibility of replacing Coober Pedy’s diesel generation with renewables:
In 2013, EnGen began investigating the potential to integrate renewable energy into the existing power station to reduce diesel consumption in Coober Pedy. EnGen submitted an Expression of Interest to the Australian Renewable Energy Agency’s (“ARENA”) Regional Australia’s Renewables Industry Program (IRAR) in November 2013 which ultimately led to the execution of a Funding Agreement with ARENA in July 2014. Construction of the CPRHP commenced in September 2016 and commercial operations commenced on 1 July 2017.
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According to a number of media sources the just-released IPCC Special Report confirms that climate change is about to fry us (We need massive changes to avoid climate hell says Wired Magazine). In fact it adds nothing of significance to what the IPCC concluded in its 2014 Assessment Report (AR5) and provides no new evidence to support the claim that climate change will fry us when warming reaches 1.5 – 2°C above pre-industrial levels. Effectively all it says is that the impacts of 2°C of warming will be greater than the impacts of 1.5°C of warming. In short, it’s a molehill. Or maybe just a medium-sized cow pat.
The IPCC Special Report:
The results of the report are presented in:
Here I address only the first three documents. The Chapters are a little too long for a brief review.
What the press release says
We begin with the more important statements made in the press release, which is what the media will read first and quite possibly all the media will read:
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