P1 1.9 Heating and Insulating Buildings
- Created by: kayleigh_p
- Created on: 01-04-15 17:05
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- Heating and Insulating Buildings
- People often want to minimise rate of energy transfer
- Fibreglass loft insulation
- Reduces energy transfer by conduction
- Cavity wall insulation
- Traps air to reduce convection
- Double glazing
- Reduces conduction through windows
- Draught proofing
- Reduces convection
- Aluminium foil behind radiators
- Reflects infrared radiation back into the room
- Fibreglass loft insulation
- U-Values
- Tells how much energy per second passes through a material
- Allows us to compare materials
- The lower the U-Value, the better the insulator
- Solar heating panels
- Contain water heated by radiation from the sun
- Can be used to heat buildings or provide domestic hot water
- Cheap to run as they don't use fuel
- Expensive to buy and install
- Water is not heated at night
- People often want to minimise rate of energy transfer
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