These systems can use a variety of fuels, such as natural gas, oil, biomass, and coal. The steam leaving the turbine can be used to produce useful thermal energy. The steam is then used to turn a turbine to run a generator to produce electricity. With steam turbines, the process begins by producing steam in a boiler. Combustion turbine, or reciprocating engine, with heat recovery unitĬombustion Turbine, or Reciprocating Engine, with Heat Recovery Unit.The two most common CHP system configurations are: By capturing and using heat that would otherwise be wasted, and by avoiding distribution losses, CHP can achieve efficiencies of over 80 percent, compared to 50 percent for typical technologies (i.e., conventional electricity generation and an on-site boiler). Additional energy is wasted during the distribution of electricity to end users. Nearly two-thirds of the energy used by conventional electricity generation is wasted in the form of heat discharged to the atmosphere. CHP is typically located at facilities where there is a need for both electricity and thermal energy. CHP can be located at an individual facility or building, or be a district energy or utility resource. CHP is an energy efficient technology that generates electricity and captures the heat that would otherwise be wasted to provide useful thermal energy-such as steam or hot water-that can be used for space heating, cooling, domestic hot water and industrial processes.
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