Estimation of View Factors for Enclosures with Multiple Surfaces

View factor (form factor, shape factor, configuration factor) is an essential parameter for surface to surface radiant heat exchange formulations·  A general formulation based on vector representation and numerical procedures to estimate view factors were developed·  A computational tool which provides view factors of five surface roof enclosure  was developed based on the numerical model ·  Numerical results were compared with available analytical solution for a simple case and 1.0% error was observed for 108 iterations