Super high speed ships that change a game in transportation
Super high speed ships that changes a game
in transportation
Author: David Judbarovski, principle
inventor, retired engineer, Israel
Archive since 2006 yr.: http://judbarovski.livejournal.com
Here it is disclosed and evaluated quite
detailed an incredible sea transport, had been published as a principle
invention idea and was archived in Russian in my blog more than 10 years ago
(2007-02-18 10:37:27), but isn’t noticed in the world.
The said ships promise to deliver cheaply a
big quantity of cargo and passengers as a conventional sea ships, but as quick
as aircrafts.
A key element of my invention is to add the
water steam cocoon to the hull of conventional design of ship. Such method
allows the friction losses of energy to be practically zero, so the hydrodynamic
losses to be practically zero too, if following to the classical hydrodynamics theory
for ideal environment, and if front streamlines being considered as removing/pumping
the water environment around of sharp ship’ nose and divided
by a time of the pumping, while evidently that loses because the water
viscosity are much less than the said pumping energy.
If inform pressed air cocoon around the
ship’s hull to be created, it is a big problem up to unsolvable one, while the uniform
water steam cocoon around the ship’s hull below the waterline can be created by
electrical evaporation of the water placed in a gap between the ship’s hull and
an electrical isolation with numerous small holes or lattice for the water steam
outlet, while the said water evaporator is a simple thin metallic plate along
the said gap isolated too.
Certainly, such evaporation consumes a lot
of additional energy, but not critical quantity.
Below I show numerical evaluation for CAPEX
and OPEX for such ships and cost of transportation. At first, it is for small
cruise ship for passengers with luggage, and it is demonstrated by detailed calculations,
and then I show the evaluations results for cargo ship and for destroyer as examples
as a civil application as a military one. Anyone can repeat those results and
for any other cases, using my technics of evaluation here disclosed clearly.
Examples:
(1) Small cruise ship of 50 m length, 7 m
beam, 10 m height if a nose angle 30 grades and with ratio of deadweight tonnage
to displacement being 0.2 and cruise velocity 900 km/h = 250 m/s
The water pressure on the nose is P = k * 1000
* tan (30/2) * 0.5 * 250^2 Pa.
k<< 1, because the front water flow
is forced out to the water surface by the shock. And the shock of 900 km/h is
so big, that water replacement goes practically the all in the air as a wave with
k * 1000 ~= 1.3 approximately. It is extremely helpful for our case of our
super high-speed, but for now used speeds no more than 100 km/h it used as a reason
to make the ships’ noses tilted back and above and thickened below. So P ~= 10.000
Pa = 0.1 bars = 1.0 m of the water forming a wave some meters and tens meter width
along the ship route.
Volume of the water removing by the nose is
0.5 * 7 * 0.2 * 10 * 7/ tan (30/2) = V m3 = 183 m3, and a time “t” of its
removing is (7/2)/ tan (30/2) / 250 = 13/250 = 1/19 sec.
So the Q is V/t ~=183 *19 = 3500 m3/sec,
and draft power is Q * P = 3500 * 1 = 3500 kW.
The water steam cocoon consumes another about
9,000 kW electricity for compensation of the cocoon condensation by cold water
environment.
Really,
The said steam is about k1 * 0.2 * 10 ~= 1.6 m of water pressure, so it is 110 Centigrade
condensed at cold water surface “S” a little bigger than the ship’s hull below waterline, and being
about 0.2 * 10 * 50 * 2 + 50 * 7 = 550 m2.
1.6 * 10^4 * 550 = 9,000 kW.
I can recommend the cocoon thickness to enhance
before reaching the cruise velocity, and it needs in order of magnitude less
power than 9.000 kW, and then to support the thickness by all of that power.
The total power would be about 13,000 kW
for 900 km/h to serve for 1000 passengers with total luggage more than 100 ton and no any seasickness, because very high velocity,
and with much more comfortable travel,
than it can give aircraft and enjoy by
fanny USD 50.0 for ticket to compensate CAPEX and OPEX for 5,000 km race and to
give USD 25 million annually as a net profit for that business with the said
ship alone after three years of payback return.
(2) Cargo ship of 20,000 Dwt, DWT ratio =
0.82, 700 km/h, 10 ton-km = 4.5 cents. Such one ship can substitute 250,000 ton
tanker, because much more short turnover.
(3) Destroyer, 15,000 displacement, DWT
ratio = 0.25, W ~= 600,000 kW, can deliver rapid reaction force to any point of
the Earth less than in 24 hours.
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