Energy and storage systems (AQA GCSE Design and Technology): Flashcards
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Why is energy storage essential for renewables?
Why is energy storage essential for renewables?
Renewables are intermittent/not always available
Large-scale national energy storage method
Large-scale national energy storage method
Kinetic pumped storage
Kinetic pumped storage components
Kinetic pumped storage components
Hydro-electric dam + 2 reservoirs (upper & lower)
Pumped storage during high demand (daytime)
Pumped storage during high demand (daytime)
Water flows down, spins turbines, kinetic → electrical energy
Pumped storage during low demand (nighttime)
Pumped storage during low demand (nighttime)
Pumps move water up, stored as gravitational potential energy
Energy conversion in batteries
Energy conversion in batteries
Chemical energy → electrical energy
Electron flow direction in battery
Electron flow direction in battery
Negative terminal → circuit → positive terminal
Materials in alkaline batteries
Materials in alkaline batteries
Zinc and manganese dioxide
Advantages of alkaline batteries
Advantages of alkaline batteries
Higher energy output & extended shelf life
Main limitation of alkaline batteries
Main limitation of alkaline batteries
Single use only, cannot be recharged
Materials in rechargeable batteries
Materials in rechargeable batteries
Lithium-ion (Li-ion) or nickel-cadmium (NiCd)
Feature enabling battery recharging
Feature enabling battery recharging
Reversible chemical reactions
Reusability of rechargeable batteries
Reusability of rechargeable batteries
Can be used hundreds or thousands of times
Purpose of standardised battery sizes
Purpose of standardised battery sizes
Ensure interchangeability between manufacturers