Seven TPL turbocharger sizes are required to meet the current and future needs of the targeted market. TPL turbochargers are designed to satisfy the following market requirements: High compressor pressure ratio, for increased power output High turbocharger efficiency levels, for reduced fuel consumption and lower exhaust-gas temperatures High specific flow capacity, resulting in a compact design and low weight High reliability, long lifetime, longer times between overhauls Easy maintenance, even for machines run under adverse conditions (eg, lowquality heavy oil as engine fuel) Walter Schreiber Hans-Henrik Christensen René Hunziker ABB Turbo Systems The modular design concept adopted for the TPL turbocharger series, although completely new, is based on experience gained with the highly reliable VTR.4/VTC.4 series.
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Two new centrifugal compressor stages of different designs ensure a high pressure ratio and high flow capacity, plus a wide operating range and high efficiency levels. The new, unique bearing assembly includes a free-floating thrust disc. A new axial turbine family, developed especially for the TPL, increases the flow capacity. A wide range of turbine inlet casings, including optional waste gate connections, cover all known turbocharging systems. Main design features of the TPL are inboard sleeve bearings which can be lubricated directly by the engine lube oil, uncooled casings, an integrated speed sensor and integrated washing nozzles. T he modular design of the new TPL turbocharger 1 provides the flexibility necessary to meet the turbocharging requirements of new types of four-stroke and two-stroke diesel engines ranging from 1000 to 25,000 kw per turbocharger. Engine experience with the TPL turbocharger, 300 of which have already been installed, confirms the results of thermodynamic performance measurements carried out in the laboratory. Performance improvements include a higher pressure ratio, increased efficiency and higher flow capacity user priorities addressed by the new, compact turbocharger are high reliability, long service life, increased time between overhauls and easy maintenance. 1 TPL a new turbocharger series for advanced diesel engine generations ABB Turbo Systems has developed a new turbocharger series, designated TPL, for use on present-day as well as new-generation low-, medium- and high-speed engines rated from 1,000 kw up to the highest powers.