CV-18 Fujian/003 CATOBAR carrier thread
- Thread starter Jeff Head
- Start date
Steam turbine is quite simple, to put together furnace-evap-turbine-condenser on the confined space of the ship is the challenge.
A counter-argument for gas turbines is that they are more compact and allow for a greater degree of freedom in placement. The QE class has them installed in the islands, thereby saving tremendous amounts of volume that would otherwise be consumed by intake/exhaust venting. Of course, that’s only possible because she has IEPS.
One of the issue with the Nimitz carriers was the lack of electrical generation capacity.
There wasn't generator connected to the steam turbine, means they had to install auxiliary generators at the upper levels, and that moved up the centre of gravity, eroding the safety margins of the ship. (source: wiki)
Means the installation of the genset to the island is more of a cost cutting / desperate move than an example of a good design.
Hendrik_2000
Lieutenant General
The Chinese make 3400 modifications to the boiler in Liaoning if I remember correctly. Knowing the state of art of power industry in China I am not surprise that They take the old boiler and completely make it over.
There is nothing wrong with boiler turbine combo They are very reliable if it maintained and operate properly
Efficiency wise it is almost the same as gas turbine 40% roughly. Where Gas turbine win is space they are more compact. But carrier has a lot of space. And if you plant to go for nuclear reactor than it is the better since all you have to do is replacing the boiler with nuclear reactor/steam generator. Though it is not as easy as it sound since now you get shielding problem
Gas turbine wins in more ways than space. Gas turbine can start and ramp up to maximum power in minutes. Steam turbine requires hours to work up steam. Steam plants require extensive steam piping, so they are significantly more vulnerable to splinter and shock damage, and more liable to kill everyone in the engineering spaces with any serious damage. Steam turbines Are usually placed in separate compartment from boiler room with uptakes, so usually require the hull to be opened to remove and replace.
Hendrik_2000
Lieutenant General
I have yet see accident in steam power plant !There are literally thousand upon thousand of steam power plant all over the world. In fact China built 5000MW every months before the financial crisis. What accident are you talking about NONE! You are thinking of an old boiler pre WW II A frame Modern ship boiler is compact o frame Can be removed. UNlike destroyer or Frigate you don't need to ramp up power plant in carrier !
There is no problem with piping if you designed it properly by using piping stress analysis code.You can simulate shock,vibration, thermal cycle etc. NO leak either since most of the piping are of welded construction only flanged at terminal point even then you can calculate and predict when it will leak of course you have to tighten up periodically. You must be thinking of old plant! I design power plant conventional or combined cycle I know what I am talking about
This is the picture of actual Liaoning boiler on the right!. there are 8 of them. Since they are way below of course removal is difficult
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China has the same type of satellites?
and this is the Russian origin:
Source: