Efficiency and Sankey Diagrams Flashcards
What is efficiency?
How useful a device is at transferring energy.
Are appliances completely efficient?
Nothing is 100% efficient because all appliances have wasted energy.
What happens to the wasted energy?
It is dissipated into the the surrounding area and warms it up.
What does the efficiency triangle look like?
Useful on top with divide underneath, efficiency on the bottom left and total on the bottom right with a ✖️ between it.
What does a Sankey Diagram do?
A diagram to show the total amount of energy plus the wasted and useful energy of a device. E.g. a lightbulb
What does a snaky diagram look like? (or draw one)
A large shape with a thicker arrow meaning the more energy uses, and the thiner arrow meaning the less amount of energy used. The useful energy goes to the right, and the wasted goes downwards. The total goes is a line down.
What is a filament bulb?
A bulb with more wasted energy than useful.
What is an energy efficient bulb?
A bulb with more useful energy than wasted.
