Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
Without your project file or a screenshot, it's impossible to know what you're seeing.
It is true that the sum of component loads will not exactly equal the delivered load. The component loads are estimations based on instantaneous heat transfers. As an example, for any given timestep in EnergyPlus, any solar gains are counted in the component load, but not all of that solar energy is immediately seen by the HVAC system; some is absorbed by the thermal mass of the building and there is a time lag until that energy is seen by the HVAC system. So the delivered energy by the HVAC system is not perfectly aligned with how component loads are estimated.
On the other hand, it's possible that you are just being confused by the fact that some of the component loads can be negative. Those component loads below the x-axis are negative:
