System for storing electrical energy e.g. solar energy generated by photovoltaic system, has reservoir designed as overhead gas storage for storing generated pressurized air and combustible gas, and turbine generating energy from air

摘要

The system has a compressed air generating unit i.e. air compressor (3), generating pressurized air from surrounding air by generated electrical energy from a photovoltaic system (1) and/or a wind energy system (2). A reservoir is designed as an overhead gas storage (4) for storing the generated pressurized air and combustible gas. The gas storage is designed as a high-pressure gas container e.g. spherical gas container, and a compressed air-driven turbine (5) generates electrical energy from the pressurized air to be stored in the reservoir. The combustible gas is selected from illuminating gas, natural gas, liquid gas, bio-gas and/or sewage gas.