055 DDG Large Destroyer Thread

[taxiya]

There were some infographics displayed in a CCTV video from 2017 that showed the power generators of Type 055 residing in separate bulkheads from the propulsion GTs. That's enough evidence to me to conclude that they too come with standalone prime movers, just like on the Arleigh Burke. There's an article from Henry Kahn that goes into some speculation what the potential power generation might be:

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These are the schematics in the link.
Do you mean this one with question mark?


I think there are only two sets in the pictures on both sides of the yellow object. On each side the two blue blocks are different things. If one side is a pair (2) of propulsion turbines, there are only 4 turbines in the pictures, no separate prime movers for electricity.

055 may or may not use separate prime mover for electricity generation, but these pictures are not useful to determine.

 

[Max Demian]

I think there are only two sets in the pictures on both sides of the yellow object. On each side the two blue blocks are different things. If one side is a pair (2) of propulsion turbines, there are only 4 turbines in the pictures, no separate prime movers for electricity.

055 may or may not use separate prime mover for electricity generation, but these pictures are not useful to determine.

The way I saw the diagram was 4 GTs for propulsion (2 per shaft) - the big blocks in the center. Then on opposing sides 2 sets of 3 generators each (your question marks). That's what Henry K explains in his blog article.

The propulsion GTs are assumed to be the GT25000. It's unclear what the generators are and what their power output is. Henry K put forward some guesses based on available data.

 

[taxiya]

The way I saw the diagram was 4 GTs for propulsion (2 per shaft) - the big blocks in the center. Then on opposing sides 2 sets of 3 generators each (your question marks). That's what Henry K explains in his blog article.

The propulsion GTs are assumed to be the GT25000. It's unclear what the generators are and what their power output is. Henry K put forward some guesses based on available data.

I see your point. I don't read French though, but google translate is helpful.

 

[Appix]

Yeah, 5 days ago.

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It made only it's appearance during 70th anniversary of the PLAN. That doesn't mean it's commissioned until confirmed.

 

[Tam]

It made only it's appearance during 70th anniversary of the PLAN. That doesn't mean it's commissioned until confirmed.

Usually when a ship gets its pennant painted on the ship and its named formally, has a PLAN appointed crew and captain, yes its commissioned.

 

[Tam]

Posted by LKJ86 at the PDF.

 

[Max Demian]

... whatever:

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I couldn't find anywhere the actual Navy source for the claim in that article. I read USNI news regularly and don't recall seeing that piece. Either way, the point about HED was only tangential to the discussion.

When making power estimates , I think it's also important to take into account redundancy. Burke 's typically operate just two out of their three power generators. Therefore all their normal operation electrical loads are within the 6MW budget.

Taking a conservative view, the generators on Type 055 might be either 2MW or 3MW units. Either equal to a Flight III or 50% more combined electrical power.

 

[Biscuits]

It made only it's appearance during 70th anniversary of the PLAN. That doesn't mean it's commissioned until confirmed.

...Having a pennant number, a navy captain & crew, participating in naval exercises doesn’t mean it is commissioned? Aren’t you contradicting yourself here?

 

[Brumby]

052D doesn't have IEPS. All those power sources you listed are directly attached to the propeller shafts. It needs seperate power generators, just like the Burkes.

As for the power input number I posted, that is guesswork. The actual numbers are classified for every system. But at the very least we can assume 20% efficiency from electric input to RF + extra power to cool the panels down to 60-70 degrees celsisus + conversion losses from electrical generator voltage to radar equipment voltages + some provision to handle the peak power ( at 125kW average the peak output RF is 625kW, but this is at efficiency close to 20%, so you shoot close to 3MW instantaneous input power for a few miliseconds).

If you guys want to work off DDG51 numbers you need to at least adopt numbers that you can reasonably use to extrapolate. You are right that the DDG51 rely on generators to power their requirements. There are 3 X 3 MW generators but redundancy dictates that operating requirements must be supported by 2. The total battle load requirements for DDG51 are a bit above 4MW (source : Captain Mark Vandroff, program manager of DDG51). I estimate that the SPY-1D(v) radar requirement is approximately 1.6MV. It should be noted that only one beam is generated at any single instance (dual beam from SPY-1D(V) onwards). It should also be noted that each pulse length is believe to be between 6.4 to 51 microseconds but these numbers likely have changed over time (source: Friedman, “World Naval Weapon Systems,” p. 316.). According to Captain Vandroff, the cooling requirement of DDG51 is approximately 1000 tons but I don't think you can use this number to determine the associated power requirement

 

[by78]

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