Abstract: Provided is a system and a method which allow hydrogen to be produced both efficiently and in a stable manner when using exhaust gas produced by power generation as a heat source for the dehydrogenation reaction, controlling the temperature of the dehydrogenation reaction within an appropriate range.

Abstract: Provided is a system and a method which allow hydrogen to be produced both efficiently and in a stable manner when using exhaust gas produced by power generation as a heat source for the dehydrogenation reaction, controlling the temperature of the dehydrogenation reaction within an appropriate range.

Abstract: A start-up method of a steam turbine plant including a condenser is disclosed. The condenser includes a tube bundle composed of a number of pipes for condensing an exhaust steam from a steam turbine and a hot well for receiving and storing a condensate therein. The interior of the condenser is airtightly divided into two spaces with a partition therebetween, one of them being an upper space containing the tube bundle and the other one being a lower space containing the hot well. A communication passageway(s) extends between the upper space and the lower space with an isolation valve in the form of a butterfly valve disposed on the communication passageway. At the shut-down of the steam turbine plant, the isolation valve is closed to isolate the upper space from the lower space while the lower space is maintained in vacuum.

Abstract: In a combined cycle turbine plant in which a plurality of single shaft type combined cycle systems are combined into a plant, when a set load is to be decreased, the loads of all running shafts are decreased equally until a predetermined load of the unit is reached and thereafter a required number of shafts are stopped.