The effective heat storage capacity describes the property of a building material or component to absorb and store heat supplied from the environment and to release it again when the environment cools down. In particular, it has an influence on the stability of the indoor climate and thermal insulation in summer. The greater the heat storage capacity of the individual components that comprise a room, the slower the room heats up or cools down.
The effective heat storage capacity is calculated as follows:
Cwirk = c x ρ x dwirk x A
C wirk = effective heat storage capacity in J/K
c = specific heat capacity in J/(kg x K)
ρ = bulk density in kg/m3
dwirk = effective component thickness in m
A = component area in m2
In the case of external walls, the inner wall layers up to the thermal insulation and in the case of single-shell interior walls, half the wall thickness for the respective adjoining room are effective.
For energy verifications, the effective heat storage capacity is related to the usable area (summer thermal insulation according to DIN 4108-2 and DIN V 18599) or the building volume (verifications according to DIN V 4108-6).
Source: bauwion
