Revolutionary fresh look on ships' design
Daewoo Shipbuilding & Marine
Engineering Co., Ltd,
South Korea
Dear gentlemen!
July 9, 2019
Please, permit me to present you a
revolutionary fresh look on ships’ design.
It allows a heavy warship of 75-150 km/h
instead of ordinary 55 km/m with the same displacement and higher power. It
allows a supertanker of your last design (30 km/h, so 14 days for 10.000 km
long) to be substituted by single ship of 30 times less DWT, and 30 times
quicker, about 120,000 kW, and sufficiently cheaper OPEX.
It can be effective used for cheapest delivery:
fresh agriculture products, oil, natural gas without its liquefying, other mass
cargo for a long distance and up to 900 km/h, and as a military quick response.
Really:
Surface ships’ and submarines’ power consume
is proportional to cube of their speed V m/s
(1) W ~ V^3 = k * V^3 * B (beam) * H
(draft) (kW),
while my concept’s power is proportional to
the speed
(2) W ~ V = V * H^2 * B (kW)
Indeed:
For that purpose, its nose is tilted back
from its lowest point to highest one, and the ship is submerged, while its roof
is near to the sea level.
The ship’s nose as a wedge pushes the front
water upward to the air, because the water can be considered as incompressible
and continuous medium in our case, so
(3) W = Q (m3/s) * H (meters of water column)
(kW)
(4) Q = B * H * l (nose length) / (l / V)
=B * H * V
Combining (3) and (4), it gives (2)
Moreover, additional loses of that ship can
and must be relatively negligible by using a pressed air cocoon around the
sides and the bottom. It is not
sophisticated, but routine designer work, had been made by me too.
q (kWh / ton-km) = W (kW) / (G (displacement,
m^3) * V (km/h)) can be considered as a OPEX.
In our case
(5) q =
H / (3.6 * L (m)), i.e. depended on H-to-L ratio only and q = about 0.015
or less, and not depended on a ship speed !!! (Here, L – is an effective length
of a ship).
So q = 0.012 kWh/ ton-km approximately, or
1.5 USA cents/10 ton-km or even much less.
Sincerely,
David Judbarovski, 79, systems engineering,
principle inventor, retired,
Israel
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