Reducing unwanted energy transfers

Question 1

What can you do to prevent energy loss?

Answer 1

Thick walls made from a material with low thermal conductivity - thicker the walls lower the thermal conductivity the slower the rate of energy transfer will be

Question 2

What do some houses have ?

Answer 2

Cavity walls - made up of an inner and outer wall with an air gap in the middle

Question 3

What does the air gap reduce ?

Answer 3

It reduces the amount of energy transfered by conduction

Question 4

What is cavity wall insulation ?

Answer 4

cavity wall air gap is filled with foam - it can reduce energy transfer by convection in the wall cavity

Question 5

What is loft insulation ?

Answer 5

Laid out across the loft floor and ceiling - fibreglass wall used as a good insulator as it has pockets of trapped air

Question 6

How does this loose energy?

Answer 6

It loses energy by conduction helps prevent convection currents from being created

Question 7

What do double glazed window’s help do ?

Answer 7

They work in the same way as cavity walls - have an air gap between the two sheets of glass which helps prevent energy transfer by conduction through the windows

Question 8

What are draught excluders ?

Answer 8

These go around doors and windows which stop energy transfers by convection