physics P7 (4)

Reducing unwanted energy transfers

insulating your house reduces energy loss 

loft insulation- fibreglass wood laid on the flor and ceiling reduces energy loss from the house by conduction and convection. 

hot water tank jacket- reduces conduction keeping the water hot 

double glazing- two layers of glass with an air gap between to reduce conduction

thick curtains- reduce heat loss by convection and condcution through the windows

draught proofing- strips of foam and plastic around doors and windows stop hot air going out reducing convection 

cavity walls and cavity wall insulation- two layers of bricks with a gap between them reduce conduction but energy is also trnsferred across the gap by convection. squirting insulating foam into the gap traps pockets of air to minimise this convection. 

the thickness of walls affects…