[EnergyPlus_Support] Re: Surface Solar Incident

["jeannieboef" <jeannieboef@xxxxxxxxx>]

I would expect that in winter (Jan, northern hemisphere) at noon (12:00) midday, that the sun is nearer to the horizon than in summer at the same time. Do you know if solar incident is nadir? I think it is, meaning that 0 degrees is perpendicular to the ground. If this is the case the solar incident is less in summer than in winter. Like I said I think the angle is relative to a horizontal (flat, parallel to the ground) surface. I don't know how it is defined.

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "yclmrl" <yucel_meral@...> wrote:
>
> Hi there;
> I made a simple model that has one zone on nothern hemisphere and I simulated it for 21 June and 21 January design days.For output files Energy Plus calculated surface solar incident. But at the south wall in 21 January, surface solar incident is higher than 21 June. Is that possible? 
> 
> meral
>




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