Hello now i am checking the zone air heat balance for each zone. but i just found that the internal convective heat gain from perimeter zones have negative results during night in winter.
actually, input/output reference describes internal convective heat gain rate as "The Zone Air Heat Balance Internal Convective Heat Gain Rate is the sum, in watts, of heat transferred to the zone air from all types of internal gains, including people, lights, equipment etc. This and the following provide results on the load components of the zone air heat balance. This field is not multiplied by zone or group multipliers."
and i don't get how internal convective heat gain can have negative results.
please teach me why this can be happened or what kinds of aspects are included in internal gains except people, lights, equipment.
