Yun Jie,
Cooling load depends on Heat transfer through the walls, windows, floors, ceilings and roof. Air movement through door, window openings also contribute
Basically, heat transfer can be by conduction, convection and radiation and this depends on outside environment. Generally, the data on outside environment is given by the weather file. If the year’s hourly data on temperature, radiation, wind speed and direction does not change and the setpoint for the indoor temperature does not change, then the two years’ energy consumption should not change.
ooi
Attachment not found: d:\eudora\attach\a day's data.txt