New diesel electric propulsion system BLUEDRIVE PlusC www.siemens.no/marine
New diesel electric propulsion system Reference Project ST920 for Østensjø Rederi AS For the project ST920 the owner Østensjø utilizes their own enviromental and operational philosophy MIndSET. Designed to fit the MIndSET purpose the Siemens BLUEDRIVE PlusC system makes the enviromental and fuel efficiency goals possible.
Operating profile for similar vessel 150 250 2250 2000 Transit Greenhouse gas emissions NOX emission Manouvering to/from rig 2750 1360 Manouveringharbour Alongside terminal Waiting offshore DP Tonn/year 35 30 25 20 15 10 5 0 DEP DF Bluedrive Plus C GAS EP Nox (tonn/year) Shown is the difference in CO2, HCH / Metane and total Greenhouse gas emmissions between Bluedrive PlusC and the alternative propulsion systems. Energy consumtion MGO The BLUEDRIVE PlusC solution increase exhaust gas temperature at low load enabling full utilization of SCR over the whole load area. The illustration shows difference in NOX emission between BLUEDRIVE PlusC solution and alternative propulsion systems. Engine load SFOC 3000 2500 300 280 Tonn/year 2000 1500 SFOC 260 240 1000 220 500 200 0 DEP DF Bluedrive Plus C GAS EP 180 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% Energy consumption as MGO (tonn/year) SFO Fixed rpm SFO Bluedrive C By implemention of the BLUEDRIVE PlusC the overall fuel consumption is reduced. The illustration shows the BLUE- DRIVE PlusC solution compared to alternative propulsion systems. The diagram shows the significant difference in gr/kwh between a constant speed genset and a variable speed diesel genset. SCR: DEP: DF: GAS EP: BLUEDRIVE PlusC : Selective catalytic reduction Diesel electric, constant speed gensets Dual Fuel Electric, constant speed gas/diesel gensets Gas Electric, constant speed Gas gensets Diesel electric, variable speed gensets according to Mindset Philosophy
The BLUEDRIVE PlusC concept Siemens has over many years created a wide portfolio and extensive competence within the field of power electronics and propulsion systems. By changing the conventional propulsion system configuration and implementing a total new control philosophy, the ultracompact BLUEDRIVE PlusC system is created. With this system a whole new set of possibilities and advantages opens. Main benefits Low emission of greenhouse gases Low fuel consumption Low investment cost compared to gas/dual fuel systems Makes full utilization of SCR systems and reduced NOX emissions possible Reduced maintenance cost on diesel engines Increased life time of diesel engines, especially for high speed engines Reduced space, volume and weight of the electrical system Increased overall efficiency of the electric system Clean power supply to all auxiliary consumers No rectifier transformers Variable speed operated diesel engines and load shifting With the BLUEDRIVE PlusC electric propulsion system individual speed control of each engine over the whole engine speed region is possible. This even for full diesel electric vessels independent of synchronous speed. The control system will dynamically set the speed according to the at all time optimal operational point of the engine. The BLUEDRIVE PlusC control system secures by this that the diesel engines are operating at the lowest possible specific fuel consumption (g/kwh). During DP operation the advantages are substantial as production and even spinning reserve can be realized with limited consumption, emission and maintenance cost. To lower the fuel consumption even more the system makes load shifting between the port and starboard part of the system possible. Electric power system The synchronous generators are designed to operate in the same speed and power range as the connected diesel-engine. Due to extended development of the power electronics the main drives unit BLUEDRIVE PlusC is created as a stand-alone integrated unit including the generator and bus-tie panel as well as the frequency converter controls for all thrusters and auxiliary drives. The unit provides as well clean power supply to all auxiliary consumers and all electronics are based on known and well proven technology. In addition to the operational advantages the new unit reduces footprint, volume and weight by at least 30 %. Power station control system The BLUEDRIVE PlusC unit is equipped with a integrated control system that realize all genset control, drives control and power management functionality within the unit itself. The speed and power of the diesel engines is controlled in correspondence with the total power consumption of the vessel. The electric system is only fed with active power from the generators; hence there is no circulating reactive power to handle. The speed and power characteristics of the diesel engine will be parameterized according to the selected diesel engine type. Integrated parts of the system is Power Management (PMS), Power Plant Protection (P3) and Generator Power Adaption Systems (GPA). All these systems are integrated in the integrated control system of the BLUEDRIVE PlusC.
Powered with battery The design of the BLUEDRIVE PlusC makes it possible to easily integrate modern large scale battery systems. Modern battery systems based on Lithium Technology makes it favorable and financially viable to install batteries on board different kind of vessels. The batteries can act as sole energy source for the low load conditions, handle peak loads without starting standby gensets and act as energy buffer for optimized energy production. The utilization of batteries as secondary energy source and buffer will give a optimized solution with regards to emissions as well as investment and life cycle cost. Shore connection The BLUEDRIVE PlusC concept makes it easier to connect the vessel to the harbor grid power system regardless of voltage and frequency differences. In case batteries are the only source of power operating the vessel, the BLUEDRIVE PlusC system will charge the batteries during harbor stay. Auxiliary drives The BLUEDRIVE PlusC concept facilitates easy integration of inverter units for auxiliary electric motors, i.e. > 10kW. This reduces the overall system investment cost and will give an additional pay-off in the life cycle cost with lower power consumption and reduced maintenance of pumps, fans, winches etc. Throttle valves or bypass system are not needed anymore. In case of regenerative braking of the machinery, i.e. winches or cranes, the energy will be fed back into the BLUEDRIVE PlusC system. Integrated vessel management All sub- and main- systems are connected together as a holistic and uniform system to manage a high degree of decision support. Products and systems from Siemens are developed and designed to secure an optimized interface between all components making it possible to reduce the overall engineering and investment costs. Reduced numbers of signaling cables on the vessel is a key issue. The Siemens integrated alarm and monitoring system collects signals and controlls subsystems. The Siemens remote propulsion thruster control as well as independent joystick function is integrated with the BLUEDRIVE PlusC and takes care of the command signal transfer from bridge to propulsion system as well as taking an important part of the systems automatic control. Remote supervision - Teleservice All Siemens systems are connected and will be accessible through remote supervision Teleservice. Through this connection Siemens can provide competent on-shore support for failure analysis, condition monitoring, software upgrades and planned maintenance. This entire feature will provide safer operation worldwide and easier access for the ship owner to our experienced service personnel without expensive and time consuming travels.
Siemens AS Marine Solutions Bratsbergveien 5 NO-7037 Trondheim Tel: +47 73 95 90 00 marine.no@siemens.com