Date: January 31, 2012

This report investigates developing sky radiative models for the Modelica systems programming language and compare those results to sky radiative models used in current simulation tools such as TRNSYS and Matlab. TRNSYS and Matlab softwares are commercially available, and have been used extensively to implement sky radiative algorithms linked with component-based building simulations and control implementations. While the softwares do require nancial investments to access the simulation tools,the highly modular components are adaptable to new modeling improvements that emerge in the literature.