Secondary Fuels and Energy Storage Environmental Studies AQA Unit 3 3.5 / 5 based on 4 ratings ? Environmental Science/StudiesA2/A-levelAQA Created by: ConnieCreated on: 23-04-12 10:09 The storage of a surplus e.g. electricity to meet a later shortage is called Peak shaving 1 of 5 What are secondary fuels Fuels that are made from other fuels e.g. electricity 2 of 5 Hydrogen is... ...a secondary fuel with a high energy density 3 of 5 Demand for energy fluctuates over a number of timescales. Daily, it peaks... ...at main meal times 4 of 5 The high energy density store of hydrogen can be released in two ways: Combustion to produce heat. Electrochemically, in a fuel cell where the hydrogen reacts with oxygen to form water. 5 of 5
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