Yuan Class AIP & Kilo Submarine Thread


BoraTas

Junior Member
Registered Member
I'd like Yuan to have at least 100MWh of battery, with 300Wh/Kg, it would weigh around 350 tons
Well, even the highest spec vehicle battery packs achieve around 170 Wh/kg. 335000 x 170 = 57 MWh.
There's a specification sheet for a Winston Battery WB-LYP10000AHA battery pack, which markets itself as used in the Yuan.
It's listed as 31MWh with a weight of 335tonnes. That works out as 92Wh/kg, which is slightly more than the GS-Yuasa industrial batteries.

If the Soryu is somewhat heavier than the Yuan, then 350-400kg of battery in the Soryu sounds like a reasonable working assumption.

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I'm also looking at the differences between the Mk1 and the Mk2 Soryu.

The Liquid Oxygen tanks and the Stirlings have been replaced by an "unknown" space plus a third battery compartment which looks larger than the other 2 compartments.

If the original Soryu has 400kg of battery and I assume a normal deck height of 2.4m, I get a figure of 229kg for this third compartment.
But if they start using those "unknown" spaces as a 4th battery compartment, I get another 257kg of battery

So theoretically, the Soryu could have up to 900kg of battery at a stretch. If we use your estimate of 110Wh/kg, that's almost 100MWh of battery.

But there's so many assumptions built into this model.
And there are some comments on the Taigei having additional diesel generators using up some of the free space.


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Great answer thank you. It seems both the Yuan and Soryu have more batteries than I expected. I would expect a battery around 250 tons in the Yuan but I learned it had 335 tons of battery. If the Yuan can house a battery of 335 tons in addition to AIP, the Li-ion Soryu and Taigei may really have a 650 ton+ battery. Though I am not convinced that they would be able to house a 770 ton battery. Sounds like a lot. But it seems we are going too deep into details at this point.
E x a c t l y

do not confuse estimates of current Japanese Submarine numbers with future figures

Also, in this imaginative drawing, perhaps +10 years should be added to the dates

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Thank you but what is the source? A lot of things appear like wishful thinking to me. 770 tons sound too much even for the Soryu. We don't have 300 Wh/kg batteries yet and we are almost in 2022. Even now the Soryu's batteries may be below the 100 Wh/kg value, which is specified for 2010 in the photo. The photo is wrong at the Li-ion Soryu's submerged power. It got reduced to 5600 hp from 8000 hp, reducing the max speed to 18 knots from 20 knots according to the Japanese wiki:
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Endurance numbers seem off too. For 230,400 kWh it suggests 2094 hours at 5 knots. It would mean the Soryu must be consuming 110 kW at 5 knots. This is impossible. I remember a calculation on the Type 214, a much smaller sub, indicating that it consumes 180 kW at 4 knots including hotel load. The Soryu should consume a lot more at 5 knots.
 

Totoro

Captain
VIP Professional
At the same time, we have news of China giving one of its old 035 subs to Myanmar. Previously we had 2 035 subs given to Bangladesh. So it seems PLAN is seriously shrinking its 035 fleet, possibly to get rid of it completely within a few years, while adding 039C subs.
 

antiterror13

Brigadier
At the same time, we have news of China giving one of its old 035 subs to Myanmar. Previously we had 2 035 subs given to Bangladesh. So it seems PLAN is seriously shrinking its 035 fleet, possibly to get rid of it completely within a few years, while adding 039C subs.

Is Chine giving it or selling it? I'd imagine selling it as the refurbishment cost and modifications would have to be paid by Myanmar
 

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