Reducing Unwanted Heat Transfers 0.0 / 5 ? PhysicsEnergyGCSEAQA Created by: spencer.nhyiraCreated on: 30-05-17 22:27 Lubrication Lubricants can be used to reduce the friction between the objects surfaces when they move. They are usually be liquids eg oil so they flow easily between objects and coat them. 1 of 3 Thermal Conductivity This is the measure of how quickly energy is transferred through a material. Materials with a high thermal conductivity transfer energy between their particles at a faster rate. Conduction-transfer of energy between the particles' kinetic energy stores. Convection- particles moving from hotter to cooler regions. 2 of 3 Insulation Houses have cavity walls which have an inner and outer wall. The air gap reduces the amount of energy transferred by conduction. The foam in the wall reduces the amount of convection. Loft Insulation can reduce convection currents9where the air particles are constantly being heated rising cooling sinking) Double glazed windows prevent energy transfer by conduction through the windows. Draught excluders around doors and windows reduce enrgy transfers by convection. 3 of 3
Comments
No comments have yet been made