blockDiffusePerez

Hemispherical diffuse irradiation on a tilted surface using Perez's anisotropic sky model

Extends from Buildings.BoundaryConditions.SolarIrradiation.BaseClasses.PartialSolarIrradiation.

Information

This component computes the hemispherical diffuse irradiation on a tilted surface using an anisotropic sky model proposed by Perez. For a definition of the parameters, see the User's Guide.

References

P. Ineichen, R. Perez and R. Seals (1987). The Importance of Correct Albedo Determination for Adequately Modeling Energy Received by Tilted Surface, Solar Energy, 39(4): 301-305.
R. Perez, R. Seals, P. Ineichen, R. Stewart and D. Menicucci (1987). A New Simplified Version of the Perez Diffuse Irradiance Model for Tilted Surface, Solar Energy, 39(3): 221-231.
R. Perez, P. Ineichen, R. Seals, J. Michalsky and R. Stewart (1990). Modeling Dyalight Availability and Irradiance Componets From Direct and Global Irradiance, Solar Energy, 44(5):271-289.

Parameters

Type	Name	Default	Description
Real	rho	0.2	Ground reflectance
Modelica.Units.SI.Angle	azi		Surface azimuth
Boolean	outSkyCon	false	Output contribution of diffuse irradiation from sky
Boolean	outGroCon	false	Output contribution of diffuse irradiation from ground

Components

Type	Name	Default	Description
Modelica.Blocks.Interfaces.RealOutput	HSkyDifTil		Hemispherical diffuse solar irradiation on a tilted surface from the sky
Modelica.Blocks.Interfaces.RealOutput	HGroDifTil		Hemispherical diffuse solar irradiation on a tilted surface from the ground

Revisions

September 6, 2021, by Ettore Zanetti:
Removed parameter lat as it is now obtained from the weather data bus.
This is for IBPSA, #1477.
November 14, 2015, by Michael Wetter:
Added min, max and unit attributes for rho.
June 6, 2012, by Wangda Zuo:
Added contributions from sky and ground that were separated in base class.
February 25, 2012, by Michael Wetter:
Changed component to get zenith angle from weather bus.
May 24, 2010, by Wangda Zuo:
First implementation.