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The feed water cycle begins with condensate water being pumped out of the condenser after traveling through the steam turbines. The condensate flow rate at full load in a 500 MW plant is about 6,000 US gallons per minute (400 L/s). Diagram of boiler feed water deaerator (with vertical, domed aeration section and horizontal water storage section).
A feedwater heater is a power plant component used to pre-heat water delivered to a steam generating boiler. [ 1 ] [ 2 ] [ 3 ] Preheating the feedwater reduces the irreversibilities involved in steam generation and therefore improves the thermodynamic efficiency of the system. [ 4 ]
Pre-heat the feedwater; Provide a storage/surge volume; Based on the relevant theoretical Rankine cycle diagram, there are four main processes, or stages: Stages 1→2: Water pressure is raised from low to high by one or more pumps. Stages 2→3: Water is heated to boiling in either a conventional boiler or a nuclear propulsion steam generator
Boiler feedwater is the water which is supplied to a boiler. The feed water is put into the steam drum from a feed pump. In the steam drum the feed water is then turned into steam from the heat. After the steam is used, it is then dumped to the main condenser. From the condenser, it is then pumped to the deaerated feed tank.
As of 2022, most supercritical power plants adopt a steam inlet pressure of 24.1 MPa and inlet temperature between 538°C and 566°C, which results in plant efficiency of 40%. However, if pressure is further increased to 31 MPa the power plant is referred to as ultra-supercritical, and one can increase the steam inlet temperature to 600°C ...
Feedwater pumps range in size up to many kilowatts and the electric motor is usually separated from the pump body by some form of mechanical coupling. Large industrial condensate pumps may also serve as the feedwater pump. In either case, to force the water into the boiler, the pump must generate sufficient pressure to overcome the steam ...
First use of internal jet pumps (single nozzle, 10 per loop, 20 total). 2 recirculation loops, variable speed recirculation pumps (one pump per loop, each pump had a rated flow of 45,200 US gallons per minute (2.85 m 3 /s)). Improved ECCS spray and flood, improved feedwater spargers.
In the energy-rich Persian Gulf region, the steam from the HRSG is used for desalination plants. [1] Universities are ideal candidates for HRSG applications. They can use a gas turbine to produce high-reliability electricity for campus use. The HRSG can recover the heat from the gas turbine to produce steam/hot water for district heating or ...