blockDiffusePerez

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

Extends from Modelica.Blocks.Icons.Block (Basic graphical layout of input/output block).

Information

This component computes the hemispherical diffuse irradiation on a tilted surface by using an anisotropic model proposed by Perez.

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.

Type	Name	Default	Description
Real	rho	0.2	Ground reflectance
Modelica.Units.SI.Angle	til		Surface tilt angle

Type	Name	Description
Modelica.Blocks.Interfaces.RealInput	briCof1	Brightening Coeffcient F1
Modelica.Blocks.Interfaces.RealInput	briCof2	Brightening Coeffcient F2
Modelica.Blocks.Interfaces.RealInput	HDifHor	Diffuse horizontal solar radiation
Modelica.Blocks.Interfaces.RealInput	HGloHor	Global horizontal radiation
Modelica.Blocks.Interfaces.RealInput	zen	Zenith angle of the sun beam
Modelica.Blocks.Interfaces.RealInput	incAng	Solar incidence angle on the surface
Modelica.Blocks.Interfaces.RealOutput	HGroDifTil	Hemispherical diffuse solar irradiation on a tilted surface from the ground
Modelica.Blocks.Interfaces.RealOutput	HSkyDifTil	Hemispherical diffuse solar irradiation on a tilted surface from the sky

April 27, 2018, by Michael Wetter:
Corrected displayUnit.
This is for IBPSA, issue 912.
June 6, 2012, by Wangda Zuo:
Separated the contribution from the sky and the ground.