055 DDG Large Destroyer Thread

[Iron Man]

A dumb question but do ship based generators, like turbine engines also need ventilation? I caught the aft view of the CAD model but it doesn't seem to account the vent system.

All GTs need ventilation, and GTs need more ventilation than diesels as a general rule. Looking at the first of six graphics, it seems almost certain that the rear light blue structures are GT generators, thus making for 6 of them in total on the 055. You're possibly looking at 4 to 5 MW per generator for a total installed capacity of 24-30 MW. By comparison Flight IIA Burkes have 3 x 3 = 9MW installed power and Flight III Burkes have 3 x 4 = 12MW installed power.

There are loads of information that could be mined from just these graphics, BTW. The height of each deck seems to be at least 2.6 or even 2.7m. The watertight compartments seem to go all the way up to 1-deck. The compartment immediately aft of the rear QC280s does not seem to have enough length for 4x2 VLS modules arranged in a 4 lengthwise x 2 widthwise fashion.

 

[Tyloe]

All GTs need ventilation, and GTs need more ventilation than diesels as a general rule. Looking at the first of six graphics, it seems almost certain that the rear light blue structures are GT generators, thus making for 6 of them in total on the 055. You're possibly looking at 4 to 5 MW per generator for a total installed capacity of 24-30 MW. By comparison Flight IIA Burkes have 3 x 3 = 9MW installed power and Flight III Burkes have 3 x 4 = 12MW installed power.

There are loads of information that could be mined from just these graphics, BTW. The height of each deck seems to be at least 2.6 or even 2.7m. The watertight compartments seem to go all the way up to 1-deck. The compartment immediately aft of the rear QC280s does not seem to have enough length for 4x2 VLS modules arranged in a 4 lengthwise x 2 widthwise fashion.

Is GT abbreviated for Gas turbine engines or generators? From my basic understanding, generators turns the mechanical energy from the main shaft connecting to the engines (in this case turbines) into electricity. Only the engine needs ventilation to intake fresh air, and exhaust out the combusted gases. Do ship based generators work differently?

 

[Iron Man]

Is GT abbreviated for Gas turbine engines or generators? From my basic understanding, generators turns the mechanical energy from the main shaft connecting to the engines (in this case turbines) into electricity. Only the engine needs ventilation to intake fresh air, and exhaust out the combusted gases. Do ship based generators work differently?

GT stands for gas turbine and is used either for propulsion or for power generation, or in the case of IEP, for both. The difference is merely one of size (GTs used for propulsion are usually much larger) and what they are connected to (GTs used for power are connected to the power grid instead of the gearbox). All GTs regardless of what they are used for require large amounts of air and produce large amounts of exhaust; the larger they are the more air they require and the more exhaust they produce.

 

[Jura The idiot]

welcome back, you've missed some action here LOL

...


I think the 055 was located here:
View attachment 42412


...

... where I can clearly see 128 (it's one hundred twenty-eight) cells array at the stern

Anyway, I did make plenty of sightings of this:
View attachment 42411

the name of you attachment is
Xiaolongbao.JPG
that's why I googled
Soup Dumplings (Xiao Long Bao) Recipe

Please, Log in or Register to view URLs content!

 

[Tyloe]

GT stands for gas turbine and is used either for propulsion or for power generation, or in the case of IEP, for both. The difference is merely one of size (GTs used for propulsion are usually much larger) and what they are connected to (GTs used for power are connected to the power grid instead of the gearbox). All GTs regardless of what they are used for require large amounts of air and produce large amounts of exhaust; the larger they are the more air they require and the more exhaust they produce.

Yes but it doesn't address my question on how only the ship based generators work. My understanding is they're similar to those in other vehicles and power stations in that they don't require air ventilation. If that's the case for generators on ships, then 055's also don't require vents. Only the engines (including turbine engines) need the air intakes and exhausts for its combustion process.

Or did you gents mean 6 turbine engines instead of generators?

There's an interesting graphical model in the video Hendrik_2000 posted around the 1m mark, discussed in more detail by Henri K.

It would appear that the 055 has 6 gas turbine generator sets, in addition to 2xCOGAG. Henri K speculates the gas turbine generators could generate between 30-42MW of electrical power, 3x as much as the Flight III Arleigh Burke. So it could be that they traded off some missile capacity for future energy growth/redundancy requirements. Also, the new stealth smoke stack takes up its share of space.

Also, if the 6x GT generator theory is correct, we will need to be able to see some kind of venting system for the aft generators' uptakes and downtakes in the area of the helicopter deckhouse. They would necessarily have to be aft of the aft VLS section. Perhaps that alleged giant microwave emitter panel is actually serving a far more mundane purpose....

 

[Jura The idiot]

128...
the superstructure is more wider then the vls, so from this angle the superstructure was covered more space behind it, dmmm drawing new yellow line under the blue line, if we asumpting the line is the same elevation with the vls and the superstructure aft wall is straight without anything protrude to the vls , so it is enough space for 1row or more...

thanks for the explanation

LOL I didn't get it from
#4338 dmmm, Yesterday at 7:19 PM

 

[Iron Man]

welcome back, you've missed some action here LOL
... where I can clearly see 128 (it's one hundred twenty-eight) cells array at the stern


the name of you attachment is
Xiaolongbao.JPG
that's why I googled
Soup Dumplings (Xiao Long Bao) Recipe

Please, Log in or Register to view URLs content!

You have a sharp eye there.

Yes but it doesn't address my question on how only the ship based generators work. My understanding is they're similar to those in other vehicles and power stations in that they don't require air ventilation. If that's the case for generators on ships, then 055's also don't require vents. Only the engines (including turbine engines) need the air intakes and exhausts for its combustion process.

Or did you gents mean 6 turbine engines instead of generators?

How does not it address your question? I'm saying that your understanding that they don't require ventilation is incorrect. They in fact require ventilation. ALL GTs require ventilation regardless of what they are used for. Think of a GT as a fighter engine in a box, because that is basically what they are, whether they are used to generate power or used to turn a propeller. You're getting hung up on "engine" vs "generator" when you shouldn't be; as I said the only difference is size and what they are attached to. In either case they need lots of air and expel lots of exhaust.

 

[Tyloe]

How does not it address your question? I'm saying that your understanding that they don't require ventilation is incorrect. They in fact require ventilation. ALL GTs require ventilation regardless of what they are used for. Think of a GT as a fighter engine in a box, because that is basically what they are, whether they are used to generate power or used to turn a propeller. You're getting hung up on "engine" vs "generator" when you shouldn't be; as I said the only difference is size and what they are attached to. In either case they need lots of air and expel lots of exhaust.

They're two different subsystems. I understand only the GTs need ventilation, but the generators only need the GTs to rotate the drive shafts, so they can turn mechanical energy produced into stored electricity. Generators don't require a shared or isolated vent system.

Also, if the 6x GT generator theory is correct, we will need to be able to see some kind of venting system for the aft generators' uptakes and downtakes in the area of the helicopter deckhouse. They would necessarily have to be aft of the aft VLS section. Perhaps that alleged giant microwave emitter panel is actually serving a far more mundane purpose....

 

[Iron Man]

They're two different subsystems. I understand only the GTs need ventilation, but the generators only need the GTs to rotate the drive shafts, so they can turn mechanical energy produced into stored electricity. Generators don't require a shared or isolated vent system.

Again, your understanding is incorrect. Turning mechanical energy into electrical energy does not make a GT require more or less ventilation. A GT used as a generator in a 10,000 ton ship could be used as an engine in a 3,000 ton ship. The only difference is that in the first case the GT is connected to the power grid and in the second case the GT is connected to the gearbox. Both would be the same exact GT requiring the same input of air and producing the same output of exhaust. Your understanding of how a GT works is lacking despite you posting a video of exactly how a GT works. That GT in that video could be referring to either a generator or an engine, it makes no difference. In either case you need fresh air to be compressed, lit up by fuel, used to turn a turbine, and vented out as exhaust. That turbine in turn is what is used to either turn the cogs in the gearbox or used to generate electricity. Either way input air is used and output exhaust is generated. I have no idea at this point why you still don't understand this simple point.

 

[Tyloe]

Again, your understanding is incorrect. Turning mechanical energy into electrical energy does not make a GT require more or less ventilation. A GT used as a generator in a 10,000 ton ship could be used as an engine in a 3,000 ton ship. The only difference is that in the first case the GT is connected to the power grid and in the second case the GT is connected to the gearbox. Both would be the same exact GT requiring the same input of air and producing the same output of exhaust. Your understanding of how a GT works is lacking despite you posting a video of exactly how a GT works. That GT in that video could be referring to either a generator or an engine, it makes no difference. In either case you need fresh air to be compressed, lit up by fuel, used to turn a turbine, and vented out as exhaust. That turbine in turn is what is used to either turn the cogs in the gearbox or used to generate electricity. Either way input air is used and output exhaust is generated. I have no idea at this point why you still don't understand this simple point.

The video clearly differentiated a GT from a generator and their specific roles though. And I can't see how a GT (type of engine) can be used as a generator, which is tasked to turn chemical energy (combustion process) into mechanical energy (rotating the connected drive shaft to the generator).