055 DDG Large Destroyer Thread

[taxiya]

So for now 055's GTGS with its output shaft from the exhaust side sounds the most plausible then. Given there's no vent system shown in the CAD model, while the Burke's GTGS intake's definitely faces aft with the crossing vents, and a larger duct provides the large volume of air the GT accelerates. If that's the case then the air intake and exhaust vents of aft GTGSs would need to cross each other like with Burke's forward GTGSs.

and @Iron Man
I don't fully get your conclusions. Let me ask these questions.
The lower deck in front of the aft VLS complex, it houses the intake and/or exhaust of the GT for generators, right?
There is one cover visible, from the look of its size, I guess there are totally two. If the answer above is yes, are they intakes, exhausts or one each?

 

[Max Demian]

What type of GT (for generators) would you guess they are? Power range? We have heard some types, but I can't figure out which one can fit in this picture.

Henri K suspects something on the order of QD50, with 5 MW output.

To get an idea about dimensions, a somewhat more powerful MGT 6100 is: 13.4 x 3.0 x 3.8 m

 

[taxiya]

Henri K suspects something on the order of QD50, with 5 MW output.

thanks. 5x6=30MW which is in the range of rumor that I heard of about 055's max electricity generation package (not 30MWe, but MWm).

However, QD-50 is new to me. Do you have some specs about it? I would appreciate that.

 

[Tyloe]

and @Iron Man
I don't fully get your conclusions. Let me ask these questions.
The lower deck in front of the aft VLS complex, it houses the intake and/or exhaust of the GT for generators, right?
There is one cover visible, from the look of its size, I guess there are totally two. If the answer above is yes, are they intakes, exhausts or one each?

They should be air intakes which may lead to the GTs for the generators (GTGS), but Iron Man also suggested that the protruded panels on the hangar may be air intake/exhaust vents for the aft GTGSs.

And as for GTGS arrangement, it's most likely the other way around. 055 has its GT's output shaft (connecting to the generator) from the exhaust side, while the intake is facing the other way; based on the port sizes in the computer model and that the air intake port is likely larger than the exhaust port.

Most likely setup of 055's GTGS (updated)

 

[Tyloe]

This is most likely the complete setup based on the CAD model.

 

[Iron Man]

What type of GT (for generators) would you guess they are? Power range? We have heard some types, but I can't figure out which one can fit in this picture.

I would guess 4-5MW, but really 3 or 6MW are not out of the realm of possibly either.

and @Iron Man
I don't fully get your conclusions. Let me ask these questions.
The lower deck in front of the aft VLS complex, it houses the intake and/or exhaust of the GT for generators, right?
There is one cover visible, from the look of its size, I guess there are totally two. If the answer above is yes, are they intakes, exhausts or one each?

The step deck is definitely a downtake (intake), which many people have already pointed out is not an ideal location for a downtake given its close proximity to the aft VLS section. I don't see how it will possibly be able to avoid sucking down missile exhaust when any missile from the aft VLS section is fired. The next stack forward of the step deck is definitely uptake (exhaust). These two sets of vents comprise the ventilation system for the aft pair of GT engines. Just forward of the tall uptake stack is 'free' space. I suspect it may house UNREP equipment (e.g. sliding pad eye). This area sits directly above the dual transmission system at the bottom of the boat. Transmission does not require venting, so this area is a freebie as far as ventilation goes. Just forward of that is the uptake stack for the forward pair of GT engines. Just forward of that is the downtake for the same pair of engines. Now, where the ventilation for the 6 GT generators fit into all this, I'm still not clear on.

 

[Iron Man]

Maybe?:

 

[Tyloe]

So how does Arleigh Burke's GT-generators' ventilation work? Do they share the same uptake and downtake with the forward GT engines or is it isolated?

 

[Iron Man]

So how does Arleigh Burke's GT-generators' ventilation work? Do they share the same uptake and downtake with the forward GT engines or is it isolated?

Here is the USS Pinckney:


The orange arrows are the uptakes for the 4 LM2500 GT engines. The red arrows are the uptakes for the 3 AG9140 GT generators. The blue arrows are the downtakes. The downtakes nearer the bow are probably shared by the engines and the generators, while the downtake facing the helipad is probably only used by the sternmost GT generator.

 

[kent]