Development and validation of a Radiance model for a translucent panel

Abstract

This study describes the development and validation of a Radiance model for a translucent panel. Using goniophotometer data combined with integrating sphere measurements, optical properties of the panel were derived and converted into a and integrating sphere measurements can be used to accurately model arbitrary translucent materials in Radiance using transdata function files.

Evaluación de las condiciones de orientación temporal en programas de modelación lumínica

“…Si bien los programas de modelación lumínica permiten calcular con bastante exactitud los niveles de luz natural y artificial de los recintos interiores (Mardaljevic 1995;Reinhart & Walkenhorst 2001;Reinhart & Andersen 2006;Reinhart 2010), es importante no olvidar que dichos resultados pueden verse influenciados por diversos factores, entre los cuales se incluyen métodos de cálculo, modelo de cielo, modelo de edificación, propiedades de las superficies y experiencia del usuario (Iversen et al, 2013). Por esto, a modo de asegurar la comparabilidad en los resultados obtenidos, se utilizó Raytracing como motor de renderizado, una técnica basada en el cálculo de la distribución de una gran cantidad de rayos emitidos en una escena (Larson & Shakespeare 1998).…”

Interlayer and cavity contribution to creating high light-to-solar-gain-ratio glass block from waste glasses

“…Accuracy of the simulation results relies on the models (the precision degree of the geometry and the reflectivity), ray tracing method [15,16] and simulation setting. Models were constructed to simulate VT field measurement referring to the simulation procedures developed by Laouadi and Arsenault [17].…”

Efficient calculation of daylight coefficients for rooms with dissimilar complex fenestration systems

“…Indoor illuminances or luminances are obtained at any time step by summing up the illuminance or luminance contribution of each element over all patches upon knowing the sky luminance distribution. Subsequent validation studies of Radiance combined with the daylight coefficient approach confirmed that this method can yield very reliable results compared to measurements for a side-lit space with clear glazing (Mardaljevic, 2000a), clear glazing combined with Venetian blinds (Reinhart and Walkenhorst, 2001) and translucent panels (Reinhart and Andersen, 2006). This paper revisits one of the remaining simulation challenges related to annual daylight simulations: how to calculate the daylight coefficients for rooms with dissimilar dynamic complex fenestration systems whose optical behaviour (transmission, reflection and scattering) may change over time, without repeating the time-consuming calculation process of the DC set at each time step.…”