.TransiEnt.Producer.Heat.SolarThermal.Base.SkymodelBase

Information

1. Purpose of model

Base model for modeling the influence of orientation of a surface for calculation of irradiance.

2. Level of detail, physical effects considered, and physical insight

ratio_beam is invalid for small angles

3. Limits of validity

Usage for small values of angleOfSunIncidence.horizontal is not recommended because of refraction by atmosphere

4. Interfaces

(no remarks)

5. Nomenclature

direct_tilted, diffuse_tilted and ground_tilted are the calculated irradiances of tilted surface.

6. Governing Equations

7. Remarks for Usage

Model needs outer variables SI.Irradiance direct_measured, diffuse_horizontal, sun_horizontal.

8. Validation

purely theoretical model

9. References

Duffie/Beckman (2006): Solar Engineering of Thermal Processes

10. Version History

Model created by Tobias Toerber (tobias.toerber@tuhh.de), Jul 2015

Edited by Sascha Guddusch (sascha.guddusch@tuhh.de), May 2016

Modified by Anne Senkel (anne.senkel@tuhh.de), Mar 2017

Modified by Lisa Andresen (andresen@tuhh.de), Apr. 2017

Model modified by Oliver Schülting (oliver.schuelting@tuhh.de), May 2018