Heating consumption of buildings

Scope

To define heating consumption of buildings.

Definition

Heating consumption (Q) of buildings can be defined with knowledge of surface area of building, inside and outside temperature in certain time period, and heat permeability factors. Easiest way to use heating consumption is to define it as floor area weighted calculation.

Assumptions: A_f = A_r A_w = 8A_f

U_f = (A_f/A_f*U_f + A_w/A_f*U_w + A_r/A_f*U_r)/(A_tot/A_f)

=(U_f + 8U_w + U_r)/10

where A_f is area of floor, A_r is area of roof, A_w is area of walls, U_f is heating permeability factor of floor, U_w heating permeability of walls, and U_r is heating permeability factor of roof, A_tot is total area of building surfaces.

Q = U_f * A_tot * (T_in-T_out)dt

where U_f is floor weighted heating permeability factor of building, A_tot is total surface area of building, and T_in is inside temperature and T_out outside temperature in time dt.