electric propulsion system. Te design for the vessel was developed by the Italian project office Errenavi, who are based in Rome. “When a ship is electrically powered in
the lower load range, the efficiency of the propulsion system is increased, which in turn saves substantial amounts of energy and fuel,” said Siemens. “In fact, often only about 10% of the
main propulsion power is required from the electric drive. As a result, hybrid propulsion systems offer substantial potential for increasing energy efficiency, particularly for ships with frequently changing drive modes and running speeds.” Tis is because the correct propulsion mode for the particular task or purpose can be selected. In diesel mode, power comes from the
diesel engines, which drive the motors which act as generators for the on-board power supply system while the ship is at sea. In electric mode, the same machines that provide on-board power propel the ship,
but at low speeds. This enables the main propulsion engines to run at optimum load in diesel mode, or to be switched off completely when the ship is sailing at low speed. Running the diesel engines continually
within their optimum load range not only reduces fuel consumption and emissions but also lengthens their service life. In addition, longer service intervals for the propulsion
diesel engines also help save money. Using electric motors in combination
with diesel engines substantially increases the availability of the overall system. Other benefits mentioned by Siemens include greater flexibility and safety in everyday operation as well as during difficult manoeuvres in harbours and when anchoring. WT
GE to provide Austal with gas turbines for LCS variant
GE Marine reports that it will provide Austal USA in Mobile, Alabama, with two LM2500 aero-derivative gas turbines to power the United States Navy’s third LCS type ‘Independence’ variant. To be named USS Jackson, the vessel will be powered by the LM2500s arranged in a combined diesel and gas turbine configuration with two diesel engines.
Brien Bolsinger, GE Marine’s General Manager said the newest order brings to six the number of LM2500s GE will provide to power Austal USA- built LCS vessels.
You Fight the Ship, We Fight the Fires
The new HI-FOG® navies (HI-FOG®
Electric Pump Unit for EPU-NA) is the first in
Marioff’s products developed specifically for naval applications. This new system meets tough anti-shock and vibration requirements, and can even be constructed to meet anti- magnetic requirements for mine warfare vessels.
EPU-NA is highly customisable, dramatically improving the ease with which navies can implement HI-FOG®
With standard, modular components, the HI-FOG®
water mist.
www.marioff.com marioff.mil@
marioff.fi
Warship Technology July/August 2011
45
Feature 6
Welcome to meet us at DSEi, N4 – 250
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52