Heat transfer
- Created by: Abadwal
- Created on: 13-06-17 17:43
View mindmap
- Heat transfer
- Conduction
- the transfer of heat energy through a material- without the material moving
- metals are a good conductor of heat while liquids and gasses are not good conductors of heat.
- bad conductors of heat are called insulators
- Infra- red Radiation
- All objects emit and absorb thermal radiation- it is infra-red radiation. Infrared radiation is a type of EM radiation which involves waves rather than particles. Passes through the vacuum of space. This is why we can still feel the heat of the Sun.
- Dark Matt surfaces are good emitter and good absorbers of infra-red radiation but are bad reflectors of infra-red radiation.
- Light shiny surfaces are good reflectors of infra-red radiation but the ability to absorb and reflect infr-red rediation is poor
- Dark Matt surfaces are good emitter and good absorbers of infra-red radiation but are bad reflectors of infra-red radiation.
- All objects emit and absorb thermal radiation- it is infra-red radiation. Infrared radiation is a type of EM radiation which involves waves rather than particles. Passes through the vacuum of space. This is why we can still feel the heat of the Sun.
- Insulating the home
- payback time
- payback time (years) = cost of installation (£) ÷ savings per year in fuel costs (£)
- Loft insulation, double glazing windows, draught excluders and cavity wall insulation
- payback time
- Conduction
Comments
No comments have yet been made