keeping homes warm

Question 1

what is conduction, convection and radiation.

Answer 1

conduction - Heat is thermal energy, It can be transferred from one place to another by conduction, which involves particles.

convection - Heat can be transferred from one place to another by convection. Like conduction, the process involves particles.

Radiation - does not need a material to transfer energy, energy transfer through vacuum.
http://www.bbc.co.uk/schools/gcsebitesize/science/ocr_gateway/home_energy/keeping_homes_warmrev1.shtml - use link to find out more

Question 2

What is the sankey diagram.

Answer 2

It shows the energy transformation, energy from a source like home is lost to the environment, using different amount of insulation cost different amount.

http://www.bbc.co.uk/staticarchive/ef1765b78bf7df43639092d398d58b646138287b.gif

Question 3

What is payback time.

Answer 3

is cost of insulation / annual saving.

Question 4

How is heat wasted.

What can we do to reduce this.

Answer 4

Everything that transfers energy will waste some of the energy as heat to the surrounding
buildings that are energy efficient are well insulated; so little energy is lost.