Energy Transfer Flashcards
What is the principle of conservation of energy ?
Energy cannot be created or destroyed only transferred from one form to another
What are the nine different energy forms ?
- sound energy
- light energy
- elastic potential
- electrical energy
- kinetic energy
- Chemical potential
- nuclear potential
- Thermal energy
- gravitational potential
Equation for efficiency
Useful energy output
Efficiency = ——————-
Total energy input
X 100 to get %
What diagrams can represent input, output and waste energy ?
Sankey diagrams
What is proportional in a Sankey diagram ?
The arrow size is proportional to the amount of energy that it indicates
What is conduction ?
When vibrating atoms pass on the kinetic energy to the atoms nearest them
What is convection ?
When hotter less dense fluid rises and cold more dense fluid sinks, this creates convection currents
What is radiation ?
Energy is transferred by electromagnetic waves
What are different methods to insulate homes ?
- double glazing
- cavity wall insulation
- Floor insulation
- draft excluder
