Re: [EnergyPlus_Support] Solar Irradiance - PV System

[Giovani Davi <banidavi@xxxxxxxxxxxx>]

Thanks a lot Linda.

So, I conclude I need to calculate Direct Horizontal irradiance as from EnergyPlus Direct Normal to find Global Horizontal. How could I determine SIN(solar_height)?

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De: Linda Lawrie <linda@xxxxxxxxxxxxxx>
Para: EnergyPlus_Support@xxxxxxxxxxxxxxx
Enviadas: Quinta-feira, 20 de Dezembro de 2012 21:47
Assunto: Re: [EnergyPlus_Support] Solar Irradiance - PV System

 

At 04:39 PM 12/20/2012, Giovani_Almeida wrote:

The global horizontal irradiance is the sum of DIFFUSE + DIRECT?

Not quite. 

Global Horizontal Irradiance is the sum of Diffuse Horizontal and Direct Horizontal but what the outputs are:

Diffuse Horizontal
and
Direct Normal

I_sol_direct_normal := I_sol_direct_horizontal / (SIN (solar_height));

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