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Rosemary Barnes

@engwithrosie • 1,987 subscribers

Engineer | Consultant in energy transition technology | Renewables and sustainability expert | "Engineering with Rosie" YouTube channel

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A 900 MW water battery in the Swiss Alps, built for €2B over 14 years, is operational. It uses two reservoirs at different elevations to store energy by pumping water uphill and generate power as it flows back down. It's a huge 20 GWh, enough to power 400,000 EVs.

A 900 MW water battery in the Swiss Alps, built for €2B over 14 years, is operational. It uses two reservoirs at different elevations to store energy by pumping water uphill and generate power as it flows back down. It's a huge 20 GWh, enough to power 400,000 EVs.

Rosemary Barnes

51,182 views • 1 year ago

If every house in Australia turned on a toaster simultaneously, it'd add nearly half of the grid's average load, causing it to crash. Yet, no one worried about the electricity grid when electric toasters became widespread. So why do we still think that EVs will crash the grid?

If every house in Australia turned on a toaster simultaneously, it'd add nearly half of the grid's average load, causing it to crash. Yet, no one worried about the electricity grid when electric toasters became widespread. So why do we still think that EVs will crash the grid?

Rosemary Barnes

38,828 views • 1 year ago

Nuclear for Australia? Too slow, too expensive, and it doesn't fit with renewables. By 2033, 90% of our electricity could already come from renewables. Why solve problems we don't have—like needing "baseload"? In South Australia, rooftop solar sometimes meets 100% of demand.

Nuclear for Australia? Too slow, too expensive, and it doesn't fit with renewables. By 2033, 90% of our electricity could already come from renewables. Why solve problems we don't have—like needing "baseload"? In South Australia, rooftop solar sometimes meets 100% of demand.

Rosemary Barnes

31,407 views • 1 year ago

Is the energy transition really increasing mining needs? A typical petrol car burns 17,000 liters of fuel over its life, while an EV needs just 160 kg of metals in its battery—99% less mining. Even without battery recycling (and we will recycle), clean tech mining is far lower.

Is the energy transition really increasing mining needs? A typical petrol car burns 17,000 liters of fuel over its life, while an EV needs just 160 kg of metals in its battery—99% less mining. Even without battery recycling (and we will recycle), clean tech mining is far lower.

Rosemary Barnes

18,308 views • 1 year ago

The world's largest sand battery is coming to Finland. With 100 MWh capacity, it can store excess solar/wind energy and cut district heating emissions by 70%. Heat stays at 500°C for months, replacing oil & woodchips.

The world's largest sand battery is coming to Finland. With 100 MWh capacity, it can store excess solar/wind energy and cut district heating emissions by 70%. Heat stays at 500°C for months, replacing oil & woodchips.

Rosemary Barnes

14,202 views • 1 year ago

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