Super high speed ships - Upgraded
Super high speed ships that changes a game
in transportation
For the present, it is without any consideration of upper water sructure of the ship, i.e its aerodynemic drag force
It is later upgraded by other posts
It is later upgraded by other posts
Authaor: David Judbarovski, principle
inventor, retired engineer, Israel
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 flow power being considered
as removed/pumped water environment by the sharp ship’
nose, further divided by a time of the pumping, while evidently that loses
because the water viscosity are much less than the said pumping energy.
If unform pressed air cocoon around the
ship’s hull to be created, it is a big problem, the uniform water steam cocoon
around the ship’s hull below the waterline can be created by electrical
evaporation of the water along a surface of the ship’s hull below its waterline.
The said water evaporator can be a simple thin metallic lattice gapped from the
ship’s hull and isolated by thin covers including thermal insulation of the said
hull.
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 2 bars, so it is 120
Centigrade condensed at cold water surface “S” a little bigger than the ship’s hull below waterline, and being
about 2 * 10 * 50 * 2 + 50 * 7 = 550 m2.
2 * 10^4 * 550 = 11,000 kW.
I can recommend the cocoon thickness to
enhance before reaching the cruise velocity, and it needs in order of magnitude
less power than 11.000 kW, and then to support the thickness by all of that
power.
The total power would be about 15,000 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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