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David Osmond

@DavidOsmond8

Jul 13

5 tweets
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Thread: Each week I’m running a simulation of Australia’s main electricity grid using rescaled generation data to show that it can get very close to 100% renewable electricity with just 5 hrs of storage (24 GW / 120 GWh) Results: last week: 92.3% RE last 46 weeks: 98.9% RE (1/4)

Here is the simulation from weeks 43 to 46. It was 94% renewable. For earlier weeks, see the following thread (2/4) twitter.com/DavidOsmond8/s…

David Osmond

@DavidOsmond8

Jun 29View on Twitter

Here is the simulation from weeks 41 to 44. It was 96.8% renewable. For earlier weeks, see the following thread (2/4) twitter.com/DavidOsmond8/s…

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My simulation has used wind, rooftop & utility solar data from @OpenNEM, rescaled to supply ~60%, 25% & 20% respectively over the year. It uses the storage & existing hydro to match demand. If there remains a shortfall then the model supplements generation with “Other” (3/5)

The following is an estimate of the cost of this simulated grid. When you include the costs of the various generation types, storage & transmission, it comes to around $85/MWh (5/6)

“Other” is deliberately left undefined. In the short-medium term, it’s likely to be gas, hopefully transitioning to a zero-carbon alternative like green hydrogen, biofuels, long-term storage or demand management. For FAQs & to see all the weekly results: sites.google.com/view/mostly-re…

During the year ending in June 2021, Australia's biggest electricity grid (the NEM) saw wind and solar each provide approximately 11% of electricity demand. What would have happened if we built much...

sites.google.com/view/mostly-re…

Mostly Renewable NEM

During the year ending in June 2021, Australia's biggest electricity grid (the NEM) saw wind and solar each provide approximately 11% of electricity demand. What would have happened if we built much...

David Osmond

@DavidOsmond8

Wind Engineer at @Windlab in Canberra. Passionate about renewables, EVs, efficiency and smart ideas that can reduce our impact on Earth. Views are my own.

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