A device that uses steam as the working fluid and generates power through a steam motor (mainly a steam turbine). The working fluid undergoes a cyclical change of state (→ steam cycle), converting thermal energy from fuel combustion into mechanical work. The main components are a feedwater pump, boiler, steam motor, and condenser. In a steam power plant, the mechanical work is often sent to the outside as electrical energy by a generator. Some are used in special factories to supply steam for work in addition to power. In this case, extraction and back pressure turbine power plant cycles are mainly used. A typical example of a condensing steam power plant with a condenser is a thermal power plant. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
蒸気を作動流体とし,蒸気原動機 (主として蒸気タービン ) によって動力を発生する装置。作動流体に循環的な状態変化 (→蒸気サイクル ) を行わせて,燃料の燃焼による熱エネルギーを機械的仕事に変換する。主要構成要素は給水ポンプ,ボイラ,蒸気原動機および復水器である。蒸気原動所では機械的仕事を発電機によって電気的エネルギーとして外部に送出することが多い。動力のほかに作業用蒸気を供給する特殊工場用のものもある。この場合は主として抽気ならびに背圧タービン原動所サイクルが用いられる。復水器を有する復水式蒸気原動所の代表的なものが火力発電所である。
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