An sri value is calculated using the roof surface’s solar reflectance (sr) and thermal emittance (te) The diagram below describes sr and te, which are measured values that range from 0 to 1, with 1 being the most reflective or emissive. Roofing product manufacturers must have their roofing product tested for solar reflectance and thermal emittance, and be labeled according to crrc procedures See example of a crrc label below. As defined in the 2014 sri enhancement whitepaper, sri is a daily metric where transmission loss, generation loss, and load loss events aggregate into a single value that indicates performance of the bulk electric system (bes) The sri values range from zero to 1000.
Solar reflectance index (sri) is a measure of a material’s ability to reflect solar energy and radiate absorbed heat back into the atmosphere, rather than transferring it into the building or the surrounding environment.1 sri values are typically used to assess the energy eficiency and coolness of roofing materials, especially in the context. A much more detailed coverage of the sri founding process and its players can be found in two books by weldon b
WATCH
