Building Performance Optimization of Net Zero-Energy Buildings - Modeling, Design, and Optimization of Net-Zero Energy Buildings - page 283

the expected electricity production should be slightly higher than the whole
electrical demand ( Figure 5.15 ).
Fig. 5.15 Electricity balance of the home including PV yield
If these indoor conditions are not considered satisfactory for the occupants,
a mechanical heating and cooling system (e.g., a reversible heat pump) may
be added to the optimal variant in order to control the indoor environment
in a stricter manner. In this new scenario, indoor thermal comfort
requirements shall be referred to the Fanger comfort model. The seasonal
optimal comfort temperatures (used as setpoint operative temperatures in
the model) were calculated assuming a metabolic activity of 1.2 met, a
summer clothing resistance of 0.5 clo, a winter clothing resistance of 1.0
clo, an air velocity of 0.1 m/s, a relative humidity of 50% and an external
work set at zero met. The boundary temperatures of the comfort range were
calculated in compliance with the Category II of EN 15251 suitable for new
buildings mechanically conditioned ( Figure 5.16 ) .