MAN receives waste heat recovery order
MAN Diesel & Turbo’s TCS-PTG system
MAN Diesel & Turbo reports that it has received a firm order for two turbo compound systems including power turbine and generator (TCS-PTG) from Samjin Shipbuilding in Weihai, China.
The TCS-PTGs will be employed onboard two 4,700TEU container vessels currently under construction, which on completion will be operated by German shipowner Reederei Horst Zeppenfeld. Each ship is to be powered by individual MAN B&W 6S80ME-C9.2 low-speed engines. The order includes an option for two extra vessels.
According to MAN, this represents the first such order for a marine application for the company’s new generation of TCS-PTG; previous units have been ordered for stationary power plants. Along with the two shipsets of two TCS-PTG20s, MAN Diesel & Turbo will supply two pairs of TCA88 turbochargers at a total project value of some €4 million. Delivery is scheduled to begin by the end of 2012.
MAN says that through using the TCS-PTG units, Zeppenfeld will not only save fuel but will also reduce the operating costs of their gensets as these can be run on part-load when the TCS-PTG unit takes over. During sea passage, if no reefer containers are carried, the TCS-PTG may even fully replace a genset. In many cases, the installation of a TCS-PTG unit also allows the user to minimise the installed genset power output and to reduce corresponding investment costs accordingly.
MAN Diesel & Turbo sees a growing potential for waste-heat-recovery systems such as the TCS-PTG, which can recover up to 5% of the energy from a main-engine’s exhaust gases. As an alternative, the company offers an STG (steam turbine and generator) system that recovers energy from an exhaust-gas steam boiler. A further MAN solution is the MARC_HRSTM system, which is a combination of STG and TCS-PTG that recovers up to 10% of the energy from a main-engine’s waste heat.
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