Modelling notes:
1. Start up of 90 days to give enough time for zones to rise from 15 deg C to 20 degC,
 given that there is only solar radiation for heat input.
2. Cannot have window as adiabatic because this would not allow radiation through in
ESP-r's definition of adiabatic. Therefore given low conductivity (0.0001) and low
surface heat transfer coefficients (0.001).
3. Do insolation analysis so that direct radiation is not treated diffusely but is absorbed
on surfaces having an absorptivity of 1.

Note: Change external emissivity of window in ZoneA to 0 in ZoneA.con. Otherwise, even with
emissivity set to 0.00001, there is a small radiation loss and temperatures in zone go
down to 19.95 (19.7 if emissivity is 0.0001).


OUTPUTS:
Get solar absorbed on external surface from solarzone, surf 4 (facing SW)

Do insolation analysis for all zones, even internal windows.
For these results, get same total into "calorimeter" as before (125312kWh). 
 


