Thermal Engergy

Thermal Engergy

1. Thermal Energy Transfer

   • Conduction
     • Through Substanses
       • No Movement
     • Metals Are Good Conductors
     • Wood Is A Good Insulator
   • Convection
     • Through Fluids
       • Fluids = Liquids And Gases
     • Upward Movement Of Warmer Fluids
       • Warmer Fluids Are Less Dense
   • Radiation
     • Thermal Radiation
       • Through IR Waves
         • IR Waves = Infa Red Waves 
     • Travels In Straight Lines
     • Shiney Surfaces Reflect It
       • Emmit Less Heat Through Thermal Radiation
     • Matt Black And Darker Surfaces Are Good Absorbers

2. Energy Efficient Homes

   • Where Heat Is Lost
     • The Walls
       • 35%
     • The Windows
       • 10%
     • The Doors
       • 15%
     • The Roof
       • 25%
     • The WIndows
       • 15%
   • Reduction Of Heat Loss
     • The Walls
       • Good Insulation Building Materials. Must Be:
         • Strong
         • Durable
         • Easily Available
       • Cavity Gap
         • To Stop Convection
         • Can Be Filled With Fiber Glass
         • Outer Wall Of Brick, Inner Wall Of Thermal Bricks
     • The Windows
       • Glass
         • Poor Conductor Of Heat
         • Double Glazing
           • 2 Thin Layers Of Glass To Improve Insulation
           • Triple Glazing In Very Cold Countries
     • The Roof
       • Similar To Insulation Of Walls
         • Cavity Gap
       • Loft Insulation