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basics:building_physics_-_basics:heat_transfer

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basics:building_physics_-_basics:heat_transfer [2016/07/26 12:07]
sahmed
basics:building_physics_-_basics:heat_transfer [2016/08/09 16:30] (current)
mschueren
Line 5: Line 5:
 The physical dimension for the extent of heat transfer is the heat flow rate, that is the power which passes through a square metre of a surface which is perpendicular to a surface measured in W/m² (watts per square metre). As a rule the heat flow rate (at least with small temperature differences) is proportional to the difference between the temperatures. If divided by the temperature difference, the result will be a value which characterises the heat transfer capacity of the envelope surface of the building component: this is the thermal transmittance or U-value. This is measured in W/(m²K) (watts per square metre per kelvin), whereby a temperature difference of 1 K is exactly the same as a temperature difference of 1 °C. The physical dimension for the extent of heat transfer is the heat flow rate, that is the power which passes through a square metre of a surface which is perpendicular to a surface measured in W/m² (watts per square metre). As a rule the heat flow rate (at least with small temperature differences) is proportional to the difference between the temperatures. If divided by the temperature difference, the result will be a value which characterises the heat transfer capacity of the envelope surface of the building component: this is the thermal transmittance or U-value. This is measured in W/(m²K) (watts per square metre per kelvin), whereby a temperature difference of 1 K is exactly the same as a temperature difference of 1 °C.
  
-  * [[basics:​building_physics_-_basics:​heat_transfer:​what_defines_thermal_bridge_free_design|What defines thermal bridge free design? ​]]+  * [[basics:​building_physics_-_basics:​what_defines_thermal_bridge_free_design]]
  
   * [[planning:​thermal_protection:​don_t_save_on_the_insulation ]]   * [[planning:​thermal_protection:​don_t_save_on_the_insulation ]]
  
basics/building_physics_-_basics/heat_transfer.txt · Last modified: 2016/08/09 16:30 by mschueren