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

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

TitleValidation of the Five-Phase Method for Simulating Complex Fenestration Systems with Radiance against Field Measurements
Publication TypeConference Proceedings
Year of Publication2017
AuthorsDavid Geisler-Moroder, Eleanor S Lee, Gregory J Ward
Conference Name15th International Conference of the International Building Performance Simulation Association
Date Published08/2018
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 Three-Phase 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. 

LBNL Report Number

LBNL-2001101