Category: Electricity

A power station that converts the gravitational energy of water into electrical energy.

Electrical energy generated by harnessing the power of moving – but not necessarily falling – water

A gas turbine is a heat engine that uses high-temperature, high-pressure gas as the working fluid. Part of the heat supplied by the gas is converted directly into mechanical work. High-temperature, high-pressure gas rushes out of the combustor and pushes against the turbine blades, causing them to rotate. In most cases, hot gas is produced by burning a fuel in air. This is why gas turbines are often referred to as “combustion” turbines. Because gas turbines are compact, lightweight, quick-starting, and simple to operate, they are used widely in industry, universities and colleges, hospitals, and commercial buildings. Simple-cycle gas turbines convert a portion of input energy from the fuel to electricity and use the remaining energy to produce heat, which is normally rejected to the atmosphere. However, this waste heat can be used to create steam to power a separate turbine. The attached steam turbine can generate electricity or power a mechanical load. This is referred to as combined-cycle combustion because two processes or cycles are derived from one fuel input to the primary turbine. > >Simple-cycle (i.e. without external use of exhaust heat) efficiencies range from 21% to 40%. However, turbines produce high-quality heat that can generate steam for combined-cycle or cooling, heating, and power applications and enhance efficiency. These systems capture and use the heat produced in the combustion process for steam, hot water, or thermally activated equipment such as absorption chillers. Taking advantage of the normally wasted heat means a tremendous gain in efficiency—nearly 90% in some cases. > >

A neutral operator responsible for maintaining instantaneous balance of the grid system. The ISO performs its function by controlling the dispatch of flexible plants to ensure that loads match resources available to the system. The ISO will dispatch the plants based on their availability and lowest cost of generation

An entity that produces power (electricity) from his private power station. The power can be for his own use, to sell to the national electricity grid, to end consumers or for a combination of all three