P2 Energy transfer by heating...
- Created by: 09PessegoC
- Created on: 24-09-20 22:30
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- Energy transfer by heating...
- Energy transfer by conduction
- Metals are the best conductors of energy
- Non-metal materials such as wool are fiberglass and are the best insulators.
- The higher the thermal conductivity of a material, the higher the rate of energy transfer through it
- The thicker a layer of insulating material, the lower the rate of energy transfer through it.
- Infrared radiation
- All objects emit and absorb infarared radiation.
- The hotter an object is, the more infrared radiation it emits in a given time.
- Blackbody radiation is radiation emitted by a body that absorbs all the radiation incident on it
- Specific heat capacity
- Physics- Third Edition Page 32 Key Points
- Heating and insulating buildings
- Electric and/or gas heaters and gas or oil-fired central heating or solid-fuel stoves are used to heat houses.
- The rate of energy transfer from houses can be reduced using:
- - Loft insulation
- - Cavity wall insulation
- - Double-glazed windows
- - Aluminium foil behind radiators
- - External walls with thicker bricks and lower thermal conductivity
- - Aluminium foil behind radiators
- - Double-glazed windows
- - Cavity wall insulation
- - Loft insulation
- Cavity wall insulation is insulation material that is used to fill the cavity between the two brick layers of an external house wall
- Energy transfer by conduction
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