MAN Energy Solutions to introduce PVU to ME-GI engines
MAN Energy Solutions is introducing a newly-designed Pump Vaporiser Unit (PVU) to fuel its ME-GI engines, and will install the first reference of its PVU8000 in 2020.
The PVU program consists of several sizes all dimensioned so the newly designed fuel system fits into the already existing ME-GI engine program.
Klaus Rasmussen, head of sales, retrofit projects and PVU, PrimeServ Copenhagen at MAN Energy Solutions told the Motorship in Copenhagen that the newly designed PVU is an example of MAN Energy Solutions utilizing the technical expertise of different units within MAN to achieve strategic goals on providing energy solutions to the market.
The PVU unit was developed in collaboration with MAN Energy Solutions’ unit MAN Cryo. Testing of the PVU unit installed at MAN Cryo will begin in summer 2019, with one of the first units to be installed in the retrofit conversion of Hapag Lloyd’s containership Sajir in 2020.
MAN Energy Solutions has newly developed a PVU system, where one of the main advantages is extended time between overhauls from the present market standard of 1,000-1,500 hours to 6,000 hours.
The system uses components that have extensive service histories in the marine industry: it uses the same proven hydraulic actuator technology used to operate the exhaust valves in the ME-GI engine.
The PVU system is designed to pressurize and vaporize LNG fuel to the exact pressure and temperature required by ME-GI engines by means of hydraulic actuation of the cryogenic pumps.
The improved PVU offers significant advantages over the previous third-party components used in the FGSS systems, occupying around 20m2, down from in some cases 200m2, and reducing the weight of the system. The system has low installation costs and includes separate control of each pump head, providing full pump redundancy. Each of the three pumps has a capacity of 50%.
The ME-GI PVU has an upgraded control system – including supervision and safety functions – that is highly integrated into the ME-GI engine control system. The PVU system will also offer improved sensor and operational data functionality, reflecting advances in engine control and sensor technology.
The main objectives to introduce a MAN-ES developed PVU is increased time between overhauls, to provide a more cost efficient and compact design that is easier to integrate into vessel designs.
According to Klaus Rasmussen, MAN Energy Solutions has received several orders for the new PVU already and the market shows great interest in this newly designed LNG fuel system. The PVU system will also be provided in an ethane version for those vessels that see the opportunity of utilising ethane as a future bunker fuel.
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