Aqueous gel film forming foam is a low and medium expansion foam concentrate for covering and extinguishing fires. It is a non-toxic alcohol type aqueous film forming foam compound, which not only produces an aqueous film, but forms a cohesive and regenerative polymeric second barrier as well and this barrier floats on the water-soluble liquid preventing the foam bubble from mixing with polar solvents.
Concentrator system is a photovoltaic system. It is made up of modules including concentrating optical components. The objective of a concentrator system is to improve the PV module performance by increasing the sunlight intensity falling on the cell. This is achieved by reducing the area of the solar cells being used in the system, as they are the most expensive components of a PV system, on a per-area basis.