Heat

Heat is energy transferred due to temperature differences only.

  1. Heat transfer can alter system states;
  2. Bodies don’t “contain” heat; heat is identified as it comes across system boundaries;
  3. The amount of heat needed to go from one state to another is path dependent;
  4. Adiabatic processes are ones in which no heat is transferred.

The overall heat loss from a building can be calculated as

H = Ht + Hv + Hi (1)

where

H = overall heat loss (W)

Ht = heat loss due to transmission through walls, windows, doors, floors and more (W)

Hv = heat loss caused by ventilation (W)

Hi = heat loss caused by infiltration (W)

Insulation Thickness, Thermal Conductivity & Performance Criteria

Insulation – Terms, Definitions & Formula

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