PLAN Type 054 FFG Thread II

Discussion in 'Navy' started by tphuang, Sep 14, 2008.

  1. Max Demian
    Offline

    Max Demian Junior Member
    Registered Member

    Joined:
    Jun 11, 2015
    Messages:
    316
    Likes Received:
    128
    Other than the radar cost, a smaller vessel is also limited by the power it can feed into the radars. More power, means more fuel consumption.
    A powerful ESA radar like the Type 346 probably consumes around 2MW at peak power, including cooling. Assuming a generous 90% efficiency in power distribution and transformation, to supply 2MWh from diesel generators would require about 750 liters of fuel.
     
  2. AndrewS
    Offline

    AndrewS Captain
    Registered Member

    Joined:
    Oct 5, 2015
    Messages:
    2,243
    Likes Received:
    3,026
    And how much does 750l of diesel cost?

    Fuel is actually really cheap
     
  3. plawolf
    Offline

    plawolf Brigadier

    Joined:
    Oct 19, 2007
    Messages:
    6,243
    Likes Received:
    13,040
    For navy ships, cost is a distinct secondary consideration to operational endurance. An additional 750L diesel consumption per hour just for the radar will put a significant dint in your operational range and/or refuelling frequency.
     
  4. AndrewS
    Offline

    AndrewS Captain
    Registered Member

    Joined:
    Oct 5, 2015
    Messages:
    2,243
    Likes Received:
    3,026
    Chinese navy ships are designed primarily for high-intensity operations in the Western Pacific, near to their homeports.
    As such, operational range and refuelling frequency aren't the highest priority either.

    Plus it's cheap to add additional hull volume, and then size fuel capacity appropriately.
     
  5. Jura
    Offline

    Jura General

    Joined:
    Jun 23, 2013
    Messages:
    24,090
    Likes Received:
    27,825
    not sure what's the problem here: NATO F-76 density is 0.84, I think, so 750l per hour would mean about 15t (fifteen tons) in 24 hours
     
  6. Max Demian
    Offline

    Max Demian Junior Member
    Registered Member

    Joined:
    Jun 11, 2015
    Messages:
    316
    Likes Received:
    128
    As plawolf pointed out, fuel consumption while important in the lifetime cost of the vessel, is secondary to the impact on the on-station time of the ship.

    It might come to you as a surprise, but I have read some studies for the Arleigh Burke showing that the electrical load accounts for almost 40% of all fuel consumed underway by DDG-51. In the study, the electric load was averaged to 3MW/h on an annual basis. The GTGs consumed about 1500 litres/h at that load.
     
  7. Tam
    Offline

    Tam Captain
    Registered Member

    Joined:
    Nov 3, 2016
    Messages:
    2,754
    Likes Received:
    4,864
    You don't need a full size Type 346 for a frigate. Try a downscaled one.

    I was thinking of taking the 055 style integrated mast shown in the "057" concept and fan art, and replace the X-band with an S-band that is essentially a downscaled Type 346, which can lower the overall cost and the energy consumption, and still be able to attain a search range of 300km. For fire control, you simply put a Type 344 gunnery radar (X-band) on top of the deckhouse and it can also double as a fire control for antiship missiles within the line of sight.
     
  8. Jura
    Offline

    Jura General

    Joined:
    Jun 23, 2013
    Messages:
    24,090
    Likes Received:
    27,825
    a Burke can take up to a half of million gallons, so your "1500 litres/h" could be burnt for about 52 days, as in (500000/400)/24
     
  9. Max Demian
    Offline

    Max Demian Junior Member
    Registered Member

    Joined:
    Jun 11, 2015
    Messages:
    316
    Likes Received:
    128
    It's not very useful to look at it like that. The ship has to move as well. When we add the other 60%, the fuel tanks (1500t-1600t) would be empty in just under 21 days under way. Now, add the requirement that your ships need to always be at least 75% topped up, and you need to refuel every five days.
     
    #4549 Max Demian, Dec 31, 2019
    Last edited: Dec 31, 2019
  10. AndrewS
    Offline

    AndrewS Captain
    Registered Member

    Joined:
    Oct 5, 2015
    Messages:
    2,243
    Likes Received:
    3,026
    For the Burkes yes. But Chinese warships only need to sail 1-2 days from Chinese ports to reach their operating areas. Then they have 2-3 weeks for operations
     
Loading...

Share This Page