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Posted by
ttbn, Thursday, 22 July 2021 9:08:21 AM
Fire is one problem with lithium batteries but operating cost and scalability could be the bigger issues. Pre Covid Australia was using about 262 Twh of annual electricity. According to credible estimates Australia would need 1% of that (3.65 average days) or 2.6 Twh of storage. The Snowy 2 pumped hydro project when completed will store 0.35 Twh.
Four hour lithium ion has a levelised cost of US$150 per Mwh yet realtime generators on the national grid have been happy with A$50-$100 per Mwh, albeit some of it with high CO2. Despite the rising cost of gas most of this new wind and solar will be balanced by gas fired power, not energy storage. The new small modular reactors could replace retiring coal plant cheaper than future gas with a bonus of inbuilt frequency stability, possibly no new transmission lines and no CO2. ....

Wade Allison , International Association Of Fire , Comments By Wade Allison , International Association , Rescue Services , வேட் அல்லிசன் , சர்வதேச சங்கம் ஆஃப் தீ , சர்வதேச சங்கம் , மீட்பு சேவைகள் ,

Are big batteries a safe and sensible investment? - On Line Opinion


Stored energy can bridge the gap when energy is needed but is not available. Such stores have become essential in modern life. Initially it was just the dry battery in a torch or radio and the lead acid battery in a car providing lighting and a means of starting. The capacity of such a 12 volt battery might be 100 Ampere hours – that is 1.2 kilo-watt hours (kWh). But the scale has increased by a factor of 100,000 and more. For example, the capacity of the Hornsdale Power Reserve in S. Australia, famously provided by Tesla, is now 193 MWh.
The demand for increased storage comes from the intermittency of wind and solar. These threaten breaks in supply lasting for days, even weeks. With national electricity consumption figures in tens of giga-watts and more expected with increased electrification, stores with a capacity thousands of times larger than Hornsdale are needed. Those currently under construction or planned could provide back-up for 3 to 4 hours which is simply inadeq ....

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