Squeezing the most
In a combined cycle, the gas turbine's waste heat is captured, then used to produce steam, which in turn is used to generate additional electrical power via a steam turbine. As a result, the combined cycle squeezes more energy out of a turbine's fuel, but only satisfies a power production need.
Combined heat and power systems are among the powers of energy efficiency. They reduce inefficiency through processes known as combined cycle, and cogeneration.
These thrifty systems harness unused heat from an industrial power plant's exhaust stream. Rather than letting the heat escape into the atmosphere, the heat is captured, and put to effective use in the production process.