Machinery
2 x 250MW pressurized water reactors powering 4 steam generators
4 geared low pressure turbines
4 geared high pressure turbines for 225,000shp
4 8MW Turbine Generators
Now I need you SWO daddys input on this. For back up generators what do they use these days? GTG's or Deisels?
Let me know what you guys think.[/quote]
First off, let me say that is some outstanding and impressive work Maximus, especially it all being done with MS Paint
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As far as propulsion. Would you really want to put reactors on board a battleship?
Instead of 225,000 SHP, why not go for 280,000 SHP? You already have two reactors. I am sure they will be A4W's and are good for 140K SHP each. As far as the geared turbines, the HP and LP Turbines are both connected to the reduction gears The HP and LP Turbines operate with each other and are not necessarily separate (from the HP turbine you have the crossover pipe that goes to the LP turbine). On the ends of the LP you have your reversing elements (makes the ship go in reverse) Don't forget, this being a warship, the reduction gears better be locked train, do not skimp there
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What will you use for your distilling plants? I would say you could go with one 6 stage 100,000 Gallon Per Day Distilling plant and one 125,000 Gallon per Day RO (Reverse Osmosis) plant. Plenty of water. Don't forget to make room for your Make up feed tanks and your pot water tanks. Also, in your design, make sure for the sounding tubes you have for the potable water....just in case it overflows ensure it drains somewhere other than the room where the tubes are (or at least install a drain to the bilge of overboard). Use the radar tank level indicators anyway. No need for someone to manually sound the tanks, waste of time.
If you do decide to go with boilers instead of Nuclear. I would recommend going with a pressurized furnace boiler. More than half the size and weight of a normal sized D-Type Boiler. Ensure the improved baffle design is implemented as well. The only refractory is in the superheater cavity (which by the way, the superheater is removable which makes things easier). There are other design improvements that would need to be implemented as well. Some I have came up with as well, to include the thickening of the upper and lower toroidal headers as well as using stainless for a majority of the tubes. Sure, it may cost a little more, but it will be worth it in the long run.
The boiler would be slightly larger than the original to accommodate and increase in water capacity, as well as an increase in LBS per hour generated (which is important for plant design). The boilers are forced circulation, which will add to the ability of the boiler to have an increase in PPH of steam generated. It can respond much more rapidly to bell changes as well, about just as fast as a GT ship. Startup times will be much quicker as well. Manning for this plant will be less as well. For the Exhaust gas turbine (no forced draft blowers needed, which by the way saves a lot of room as well) it will need to operate off of both steam and air. The exhaust gas turbine generates the positive furnace pressure (65 PSI) and that is where it gets the name "Pressurized furnace boiler", and is is also known as a "supercharged boiler". The burners are wide range, and depending upon the requirement you will need around 3, maybe four to support the entire operating range of the boiler to include overload (of 120%
). However the 3 can be increased in flow rate. There will be an economizer incorporated as well (increases boiler efficiency) as some P-type installations, there was no economizer, then also the draft loss would have to be taken into account with your exhaust gas turbine. Don't forget stack height....and one other thing, you better make the uptakes out of stainless, don't go skimping and half ***** it with half and half.
Forget the GTG's and go with the Emergency Diesel Generators. If you go with the Fairbanks Morse, please make sure the fuel racks are checked out, sometimes they don't reset right (and sometimes it is not the racks fault). You can go big at around 4K Each. If not Fairbanks Morse, call GM or CAT.
For the hull, how about going with prop pockets? And what about some space for launching an LCAC or two? You then can add to the mission ability of the ship. Why send an LHD closer than you have to when you have a better protected BBG that can move in a little further, and that is capable of launching and recovering them. It would be able to work in conjunction with the LHD as well. You would even be able to carry a rescue sub in there or even better support other operations. One other question, between the Barbette's and the bulkhead, how much room is there? You will be swinging some thick shafts and some big props. Important for the shafts and props. How far down will the Barbette's go? All the way? Just some questions, Rusty would be better at that though.
Later for now
SteaminDemon