Paper Conference

Proceedings of Building Simulation 2017: 15th Conference of IBPSA


Validation of the Five-Phase Method for Simulating Complex Fenestration Systems with Radiance against Field Measurements

David Geisler-Moroder1, Eleanor S. Lee2, Gregory J. Ward3
1Bartenbach GmbH, Aldrans, Austria
2Lawrence Berkeley National Laboratory, Berkeley, CA, USA
3Anyhere Software, Albany, CA, USA

Abstract: The Five-Phase Method (5-pm) for simulating complex fenestration systems with Radiance is validated against field measurements. The capability of the method to predict workplane illuminances, vertical sensor illuminances, and glare indices derived from captured and rendered high dynamic range (HDR) images is investigated. To be able to accurately represent the direct sun part of the daylight not only in sensor point simulations, but also in renderings of interior scenes, the 5-pm calculation procedure was extended. The validation shows that the 5-pm is superior to the ThreePhase Method for predicting horizontal and vertical illuminance sensor values as well as glare indices derived from rendered images. Even with input data from global and diffuse horizontal irradiance measurements only, daylight glare probability (DGP) values can be predicted within 10% error of measured values for most situations.
Pages: 1523 - 1531