Include dynamic indoor temperature

[biglimp]

Consider using eq. 3 in Lindberg et al. 2020, to make indoor temperature vary based on outdoor temperature and indoor base temperature:

Tindoor = (1 + (Ta-Tbase) / (5 * Tbase) * (Tbase + 0.4 * sin(((3 * pi) / 4) * timeday))

Tbase (standard indoor temperature) is increased (decreased) as outdoor air temperature (Ta) increases (decreases). Time of day (timeday) is expressed in decimal hours. The resulting diurnal range in Tiair is typically within a 1–5 °C.