Plan Type 095/096 Nuclear Submarine Thread

Viktor Jav

Senior Member
Registered Member
It would be interesting to see how the Type 95 submarine will look like, we always thought of modern submarines having a sleek and hydrodynamic design. However the Astute class has proven that is not necessarily always the case.
 

Hendrik_2000

Brigadier
I know yura posted it in PLAN news thread but it look more and more that this compact low noise genset is for submarine. The size of 20 MW is also right.Dafencao also believe this is more suited for sub https://twitter.com/xinfengcao/status/957150141366067200
Another indication
This project has great significance because the high power, medium voltage STG sets prop up the development of IEPS tech.
http://www.thepaper.cn/newsDetail_forward_1968458

China's first largest capacity marine turbine generator set victory: with full intellectual property rights
"CSIC" WeChat public number

2018-01-25 20:32

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This picture are from "CSSC" WeChat public number

On January 17, the first domestic largest capacity marine turbine generator set, independently designed by CSIC 704 and with full intellectual property rights, was successfully loaded to 110%. The unit runs smoothly and the performance index meets the expected target. It announces the initial victory of this type of turbo-generator research and development, which indicates that our country has mastered the core technology of marine high-power and medium-pressure turbo-generator research and development so that the high-power steam turbine for ships Generating unit made a major breakthrough in technology, successfully entered the 20MW-class era.
Another indication

The project has a variety of special requirements such as limited capacity, limited function and low noise. The power is several times of the full power of China's existing marine generating units. Compared with the most advanced power generating units in Europe and the United States, the power is large-capacity System of the core equipment. It is of great importance to develop complete electric propulsion technology and to develop a complete set of equipment. The project development is of great significance.

(Original title: "master the core technology, with complete intellectual property rights, China's first largest capacity Marine Turbogenerator victory first victory")
 

Iron Man

Major
Registered Member
>20MW seems quite excessive for a conventional submarine. That's several times the power needed for a 3-4kt conventional sub and is more typical of 7-8kt nuclear subs. Two of these could also easily propel a 054B to 30+ knots with plenty of power left over.
 

Hendrik_2000

Brigadier
Who said it is conventional sub
Type 93 is 7000 ton boat It is not small boat by any mean
French Rubis class submarine spec

Class and type: Rubis class submarine
Displacement: 2600 t (2400 t surfaced)
Length: 73.6 m (241 ft)
Beam: 7.6 m (25 ft)
Draught: 6.4 m (21 ft)
Propulsion:
  • Pressurised water K48 nuclear reactor (48 MW) ; 2 turbo-alternators ; 1 electric engine (7 MW); one propeller
  • 1 diesel-alternators SEMT Pielstick 8 PA 4V 185 SM; one auxiliary engine, 5 MW.
 
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Iron Man

Major
Registered Member
Who said it is conventional sub
Type 93 is 7000 ton boat It is not small boat by any mean
Nobody said it had to be for a conventional sub. I just pointed out that this steam turbine would have to be for a nuclear sub.

French Rubis class submarine spec

Class and type: Rubis class submarine
Displacement: 2600 t (2400 t surfaced)
Length: 73.6 m (241 ft)
Beam: 7.6 m (25 ft)
Draught: 6.4 m (21 ft)
Propulsion:
  • Pressurised water K48 nuclear reactor (48 MW) ; 2 turbo-alternators ; 1 electric engine (7 MW); one propeller
  • 1 diesel-alternators SEMT Pielstick 8 PA 4V 185 SM; one auxiliary engine, 5 MW.
BTW, just because you highlighted two different things doesn't mean they go together. That 48MW power rating is for the nuclear reactor, not the turbo-alternators, which will not be able to harness the full output of the reactor in any case.
 

Hendrik_2000

Brigadier
1 reactor and the steam is split up into 2 turbo generator for reliability purposes just in case 1 malfunction you still one to work with. Or maybe slow and fast operation. The output of 2X20 MW turbo generator fed into IEPS that drive permanent magnet motor
 
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Iron Man

Major
Registered Member
1 reactor and the steam is split up into 2 turbo generator for reliability so 2X20 MW turbo generator fed into IEPS that drive permanent magnet motor
Huh? The Rubis' "turbo-alternators" do not drive any kind of permanent magnetic motor. They generate electricity for use on the sub. There is also no evidence that they are 20MW or anywhere near it. The sub has a separate 7MW engine which is what actually turns the screw. In other words the Rubis' setup has no relation of any kind to a theoretical IEP nuclear submarine.
 

Hendrik_2000

Brigadier
Huh? The Rubis' "turbo-alternators" do not drive any kind of permanent magnetic motor. They generate electricity for use on the sub. There is also no evidence that they are 20MW or anywhere near it. The sub has a separate 7MW engine which is what actually turns the screw. In other words the Rubis' setup has no relation of any kind to a theoretical IEP nuclear submarine.
I don't mean rubis I mean the Chinese type 95
 

taxiya

Major
Registered Member
The red banner in the picture reads "QZ?-0027 10T". The ? represent some blocked white marking/letter. I am guessing that 27 represents 27MW as the operational electricity output (flat rate). With 110% max during the test, it should be able to reach 29.7MW electricity. Modern electrical moter can achieve over 98% effeciency. That means 29.1 MW shaft power. Virginia class has shaft power rated at 30MW according to wikipedia (believe or not) via direct mechanical copling. The article also claimed that "same power class with western counterpart".

It is very likely this power plant is the one to be used on new nuclear sub that was stated by Professor Ma Weiming. He said his IEPS is to be used by the new sub. There is also an application for found/award from his team titled "20MW class DC VFD", that is for the DC drive motor. The status of DC VFD is in "small number serial production/engineering application".

If we put all these together, we can see that all components for IEPS nuclear submarine are here waiting the hull.
 

taxiya

Major
Registered Member
1 reactor and the steam is split up into 2 turbo generator for reliability purposes just in case 1 malfunction you still one to work with. Or maybe slow and fast operation. The output of 2X20 MW turbo generator fed into IEPS that drive permanent magnet motor
I think one 20MW class generator is enough. As I mentioned in post #29, for comparison Virginia class is around the same displacement of 093 and probably 095, it has 30MW shaft power. 40MW would make a sub of that dimension even faster but also noisier. 30MW is good enough. 20MW class is in reality more than that. If my guess in post #29 is close to reality, it is 27MW flat shaft power with max power being 29MW in a dash. That is exactly where Virginia is, and very likely where PLAN wants to be.

Another thing is the room/footprint. 2 means double the weight and footprint, something the sub can not afford.
 
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