Second generation of two-stage turbocharging Power2 systems for medium speed gas and diesel engines
The most important technology drivers in the development of modern four-stroke medium speed engines are high total engine efficiencies, low operating costs and high power density while complying with ever more stringent emission legislation. In addition, optimization of initial costs has been considered during development to allow for short payback time and thus for a competitive advantage in the area of power generation where reciprocating engines compete with gas turbines. Improvement in all areas mentioned above can be achieved with the application of the latest turbocharging technologies. ABB Turbocharging is currently developing the second generation two-stage turbocharging system for medium speed gas and diesel engines. The work comprises a complete portfolio with four sizes covering the entire power range of large medium speed engines. All components of this new system will be fully optimized for combined use in the two-stage system. Completely new designs are being developed for the thermodynamic components. The focus is on high efficiencies for fuel savings, system compactness and flexible operation. Axial turbines will be applied for both low and high pressure stage. The turbine stage designs take into account the diverging needs between high and low pressure sides. These result from different temperature levels and flow area requirements. And, as contamination build-up is not comparable, this results in different turbine cleaning concepts. Compressor stage designs are specifically optimized for two-stage requirements. Consequently dedicated designs, highly efficient and compact turbochargers are being realized. Low and high pressure turbochargers will be based on the new concept of an extended cartridge which will facilitate service down times even shorter than those on existing single stage applications. The second generation system is the result of a step change development process motivated by field experience gathered from first generation serial systems. Studies presented at the CIMAC conference in 2007 revealed that two-stage turbocharging systems would soon become a commercially attractive alternative to state-of-the-art single stage turbochargers. Three years later, the first two-stage turbocharger designs for medium and high speed gas and diesel engines were presented. The first serial engine applications were introduced to the market with claimed benefits proven. With the development of the second generation Power2 turbocharging system, ABB Turbocharging provides an optimized technology enabling full exploitation of the advantages of two-stage turbocharging for large medium speed engines.
Thomas Behr Markus Kahi Armin Reichl Melanie Hubacher
ABB Turbocharging,Switzerland
国际会议
上海
英文
1-12
2013-05-13（万方平台首次上网日期，不代表论文的发表时间）