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How does EnergyPlus receive shortwave radiation values for the exterior energy balance?

asked 2021-03-14 20:56:26 -0500

sajithwjay's avatar

updated 2021-03-29 08:51:46 -0500

Hi all,

In the EnergyPlus documentation, exterior short wave radiation explanation is quite vague https://www.energyplus.net/sites/defa...

It says at a point in the description that. "αsol is calculated using procedures presented later in this manual and includes both direct and diffuse incident solar radiation absorbed by the surface face. This is influenced by location, surface facing angle and tilt, surface face material properties, weather conditions, etc."

But never fully discussed in the documentation later on. Is there a source which explain how the shortwave radiation figures are calculated? Thank you in advance.

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answered 2021-03-15 07:55:54 -0500

You may find it easier to consult BigLadderSoftware's online EnergyPlus documentation (the links below refer to v8.3, as per your link - you can consult documentation for other versions here).

Chapter 5 on Climate, Sky and Solar Calculations e.g. from weather data to direct/diffuse components, EnergyPlus' Sky Radiance Model, as well as Solar Gains. Chapter 6 is also quite relevant with regards to your question.

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Asked: 2021-03-14 20:56:26 -0500

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Last updated: Jul 26 '21