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Leading boiler manufacturers construct BENSON® boilers worldwide under Siemens license. The success of the technology is based on achieving the highest economy in power plant operation through:
Extensive experience together with fundamental research and development assure the highest reliability for BENSON® boilers.
Modern boilers are characterized by three essential features. All of them have been introduced by Siemens:
The most effective measure for achieving high power plant efficiency is selecting high steam pressure and high steam temperature. Increasing the steam pressure from 167 bar, the standard for drum boilers, to 250 bar enhances the efficiency by roughly 1.5% without significant increases in investment costs.
The design concept of BENSON® boilers is independent of subcritical and supercritical steam pressure. To date BENSON® boilers have been built for pressures up to 310 bar and temperatures up to 650°C.
A coal fired power plant with BENSON® boiler can sustain load transients of 4 to 6% per minute over a wide load range and in sliding pressure mode. Sliding pressure is an essential requirement for reducing thermal stresses in the turbine.
The size and geometry of the furnace of a BENSON® boiler can be optimally adjusted to the fuel without restrictions on the water/steam side, because the transition from evaporation to superheating is not fixed in location. The BENSON® boiler is constructed with the widest possible range of firing systems including fluidized bed combustion.
The high reliability of BENSON® boilers is based on scientifically-founded design fundamentals and experiences:
BENSON® technology is available everywhere, as leading boiler manufacturers in all parts of the world have obtained licenses from Siemens.
* indicates sublicense
The licensees use the comprehensive BENSON® know-how based on continuous research and development and global exchange of information. The Siemens know-how regarding the interaction between boiler, turbine and other major components, as the basis for cost-effective and reliable power plant operation, completes the BENSON® technology experience.
The first combined cycle power plant with a BENSON® heat recovery steam generator (HRSG), the 390 MW CCPP Cottam CDC located in Great Britain, was successfully commissioned in 1999. Today numerous further combined cycle power plants with BENSON® HRSG are either in operation or are currently being built.
The BENSON® HRSG technology is based on the once-through principle in combination with the BENSON® Low Mass Flux Design originally developed for coal fired steam generators and patented by Siemens.
Features of a BENSON® HRSG:
Leading HRSG manufacturers worldwide have obtained licenses for the BENSON® HRSG technology from Siemens.
* indicates sublicense
related to Steam Power Plants