Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
EnergyPlus has some sort of function to calculate, given the day of the year and the latitude, wether it is night or day. If it is night time, no incoming radiation is considered. Even if a Weather File with constant incoming radiation throughout the whole year is input, the output radiation (in Output:Variable) is 0 at night and the constant value during the day.
The time for sunrise and sunset depend on the latitude, so it makes sense that they are different in the 2 simulated cases. Since lower latitudes have longer days (for instance) during winter, the heating gain from the sun is different and the building heating load is different for 2 different latitudes.
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