I was wondering why a change of eave lengh doesn’t really affect the annual heating loads. I think, extending eave decreases cooling loads and increases heating loads, however heating loads is little change as you can see the figure.
Why doesn’t solar gain affect on heating loads?
epw : Tokyo
Left side : eave 0m, heating load : 4128kwh
Right side : eave 1.5m, heating load : 4105kwh
@Yuki, I suspect your horizontal shade is blocking the high summer sun, and not having an effect on the lower winter sun. Take a look at your sun path during the heating season to confirm this. If you modified the shading geometry to account for the sun path during your heating season (extend the horizontal shade, add vertical fins), you’ll likely see a change in the heating loads.