Energy Efficiency In The Home

Question 1

What is specific heat capacity?

Answer 1

> the amount of energy required to raise the temperature of 1Kg of something by 1 degree Celsius

Question 2

What is the U-value?

Answer 2

> the rate of heat transfer through a material.

- a material with a high U-value transfers heat more quickly.

Question 3

List the different types of energy.

Answer 3

> sound
>heat
>light 
>electrical
>kinetic 
>nuclear
> potential:
-gravitational, elastic and chemical

Question 4

Wat methods are used to insulate a house?

Answer 4

Cavity wall insulation: convection and radiation

> loft insulation: conduction and radiation

> draft excluders: convection

> hot water tank jacket: conduction and radiation

> curtains: conduction and radiation

Question 5

What types of heat transfer does cavity wall insulation protect against?

Answer 5

> reduces convection and radiation across the gap

>

Question 6

What types of heat transfer does loft insulation protect against?

Answer 6

> conduction and radiation through the roof space to ceiling

Question 7

What types of heat transfer does draught proofing protect against?

Answer 7

> stops draughts of cold air blowing in- convection

Question 8

What types of heat transfer does w hot water tank jacket protect against?

Answer 8

> lagging reduces conduction and radiation

Question 9

What types of heat transfer do curtains protect against?

Answer 9

> conduction and radiation