#BOILER DRAFT CONTROL GENERATOR#

However, ferritic stainless steel is often used in superheater sections that will not be exposed to boiling water, and electrically-heated stainless steel shell boilers are allowed under the European 'Pressure Equipment Directive' for production of steam for sterilizers and disinfectors. Stainless steel, especially of the austenitic types, is not used in wetted parts of boilers due to corrosion and stress corrosion cracking. The pressure vessel of a boiler is usually made of steel (or alloy steel), or historically of wrought iron. In all cases the combustion product waste gases are separate from the working fluid of the steam cycle, making these systems examples of external combustion engines.

#BOILER DRAFT CONTROL GENERATOR#

Where a large volume of hot gas is available from some process, a heat recovery steam generator or recovery boiler can use the heat to produce steam, with little or no extra fuel consumed such a configuration is common in a combined cycle power plant where a gas turbine and a steam boiler are used. In a nuclear power plant, boilers called steam generators are heated by the heat produced by nuclear fission. In some cases byproduct fuel such as the carbon monoxide rich offgasses of a coke battery can be burned to heat a boiler biofuels such as bagasse, where economically available, can also be used. In a fossil fuel power plant using a steam cycle for power generation, the primary heat source will be combustion of coal, oil, or natural gas.

4.2 Heat-loss method (or, indirect method).4.1 Input-output method (or, direct method).

Boiler draft control