Part 1: LABs: Hypothetical Snorting times, Crew shifts & Battery discharge schedules

Below Anonymous has constructed a hypothetical Table and Figure for situations involving lead-acid batteries (LABs).  

Later this week (probably on April 5 and 7) Pete will publish Tables and Figures involving AIP and LIBs which Anonymous constructed.

By Friday this will amount to three articles which I will run together. This is noting that the blog publishing capacity does not appear technically able to publish 4 or 5 high capacity tables/figures in a stable way.

Table 1 (below) - Routines over 24 hours for a LAB-submarine:

-  "Time/Snorting" The four coloured rows represent: 2 hours (in green) to snort at night - 

    when it is a dark night. Then 1 hour of snorting (in green) when it is still a dark night.

    Purple represents fully submerged operation on LABs. 

-  The row "Shift" represents a three shift work system

    In this system, each shift of submariners works for 6 hours then rests for 12 hours.

    (red = shift A, yellow = shift B and blue = shift C)

Time/ Snor ting	18	19	20	21	22	23	24	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17
18- 24
00- 06
06- 12
12- 18
Shift

The Green Snorting times in Table 1 (above) coincide pictorally (as closely as I can get them!) with the times in Figure 1 below).

MW
10.05
10.00
9.75
9.50
9.25
9.00
8.75
8.50
8.25
8.00
7.75
7.50
7.25
7.00
6.75
6.50
time	18	19	20	21	22	23	24	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17

Figure 1 (above) represents a LAB capacity of 10MW.  

-  For a LAB an average discharge depth might be down 35%. [Discharge depth means 

   ratio of discharged capacity to capacity of batteries. A discharge depth of 35% means that

   35% of energy of battery is released. In LABs, a deep discharge depth such as 70% would

   cause irreversible damage to the batteries. For LIBs a deep discharge depth may be as

   far down as 90%]

-  Just before the first recharge, high speed performance is limited by the shortage of 

   capacity of the LABs. Timing of snorting will be affected by large waves or storms

   [Pete Comment - The need for greater flexibility in snorting times is a major reason why

   Japan has developed snorkel generation equipment for higher "sea states" = larger waves

   or more severe storms. Such a new snorkel may be included in 29SS, the first submarine of

   a new class after the Soryu].

Anonymous and Pete