Year 9 Science · Unit 3 · Lesson 15

Energy Storage Technologies

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Learning Goals

Warm Up

Because… chain

Fill in the missing effects. Each cause leads to the next step in the green hydrogen storage cycle.

Solar panels generate excess electricity at noon
→
Water molecules are split into H₂ and O₂ by electrolysis
→
H₂ is compressed and stored in tanks
→
At night, fuel cells combine H₂ and O₂
→
Electricity and water are produced with no CO₂ released
→

Overall outcome:

Your Turn

Real-world context

South Australia sometimes generates MORE solar energy than its residents can use during sunny midday periods. Rather than wasting this surplus, engineers have proposed linking the state's solar farms to a new pumped hydro facility in the Flinders Ranges. When surplus electricity flows, pumps push water from a lower reservoir up to a higher one. When electricity is needed, especially in the evening peak, the water is released back through turbines.

(a) Describe how pumped hydro could store the surplus solar electricity. What happens to the water, and when?

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(b) What energy transformation occurs during storage (pumping) and what transformation occurs during release (generation)?

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(c) State ONE advantage and ONE limitation of pumped hydro compared to lithium-ion battery storage.

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Wrap Up

In one sentence, what was the main idea of this lesson?

HSCScience · Year 9 Science · Unit 3 · Lesson 15 · Apply Worksheet