Abstract: A double impulse turbine system to convert the energy of flowing fluid into electricity is provided. The system takes fully advantage of the high efficiency and compactness provided by contra-rotating permanent magnet generators to produce electricity. It is composed of two impulse turbines, rotating in opposite directions and coaxially connected to a central contra-rotating generator. In function, a fluid flow is divided into secondary flows oriented directly and tangentially toward the turbines for a maximum energy transfer. The system comes with turbines having different bucket designs adapted for uses in particular environments. Special housings or turbine chambers are designed to carry the turbines and enable the conversion of the energy of a fluid flowing in pipes into electricity. This double impulse turbine system can be used to convert into electricity the energy of any fluid flowing in-pipe as a flow or as a jet.

Abstract: A dynamic water shield fire protection system and method is provided for continuously wetting roof and both external and internal wall surfaces of a building with running thin water films for protecting against an impending fire. Unlike conventional sprinkler systems in which water is sprinkled, in the present invention, specially designed nozzles with flat outlets spread flattened water flows at close range directly on the surfaces to protect against fire. Protected from wind, water flowing from adjacent individual nozzles merges into a uniform water film acting as a water shield to protect the surfaces from an impending fire. A drain assembly is installed longitudinally along the bottom of each water protected surface to collect the water running down, enabling water evacuation or recycling. Thus, a fire protection system is provided to protect a building from both exterior and interior impending fire.