New propulsion sytems for ships

[Wellydeckhand]

Originally Posted by Guillermo

Outstanding new propulsion system!

IS that a Real Picture or digital funny edited type

[Wellydeckhand]

Originally Posted by Ari

Thank you D'ARTOIS. I 'am more familiar with fired boiler/waste heat boiler that use heavy fuel oil or asphalt burning system. I would like to apply eco diesel concept that you had experienced with your tractors back in Holland at a place name Enok in Indonesia.The alternative oil that they have there(coconut oil) is a lot cheaper than Diesel.Nearly every household can make coconut oil..it's so easy..and the fuel for this 'refining' purpose is free..O.K..it is open burning of coconut husk and shell..quite smoky..

Coconut is more expensive than CPO..........

[Ari]

You are right Welly..in Malaysia crude palm oil (CPO) is lotsa cheaper than coconut oil..especially virgin oil..you are in Riau province Welly?Any chance of getting the CPO there ?Malaysian companies do open lots of palm oil estate there..in fact bigger than our very own peninsular I heard..I mentioned coconut oil because majority of the people there have coconut trees..palm oil need big estate..with coconut they just put in the physical afford..they doesnt need to pay for it..

[Wellydeckhand]

If u want an estate to plant palm oil just shout I can connect u to proffesional people of the palm oil field.

Sumatra is the largest and kalimantan is growing strong...... Your choice

[Ari]

Thank you Welly..what ever small holdings we have in Malaysia is good enough for us..too bad we had just clear off our rubber trees..price of rubber is the highest now..should have replanted that 5 years ago..anyway..we have no intention of expanding the plantation..We had decided to sail and see the world..

[Wellydeckhand]

Originally Posted by Ari

Thank you Welly..what ever small holdings we have in Malaysia is good enough for us..too bad we had just clear off our rubber trees..price of rubber is the highest now..should have replanted that 5 years ago..anyway..we have no intention of expanding the plantation..We had decided to sail and see the world..

Cheers to that ..... send private email if u wanna talk about anything private in Indonesia business ok ........ cherio.....

[kjell]

Originally Posted by safewalrus

seems to me Kjell has this forum to rights - now that is exceptional! I want one - goes with some of the other featherbrained ideas you get here at times!

I f you like to see how it works, have a look to #6
http://www.ornithopter.org/forum/showthread.php?t=28

[Kiteship]

Originally Posted by marshmat

A note on water jet drives for fast freighters....
http://www.cdicorp.com/government/fi...se%20Study.pdf
CDI is claiming theoretical pump efficiencies of over 90% from driveshaft to thrust. Still 57,000hp of gas turbine is needed to turn the thing, of course, so it's not exactly a low-energy-use system. But it's a trend in freighter design to go for fast ro-ro, for sure.

This is neither a "trend" nor very bloody likely. You perhaps didn't note that this ship uses *4* of these turbines, for a total of more than 225,000 hp. As gas turbines burn something like double the diesel (or more expensive kerosene, likely) that piston engines do, this leaves this ship burning something like 20 times the amount of fuel as a 25,000 hp diesel. Further, this is an 8000 ton ship--the 25,000 hp diesel typically powers a 200,000 ton ship.

So, you've got 10 times the horsepower, burning 20 times the fuel to move 1/25th the tonnage at twice the speed. And you believe there is financial sense in this equation? It is only a junior NA's pipe dream.

I've just discovered this thread. It is interesting reading, but come on, folks. Use some common sense. Large cargo ships are already some of the most efficient transport devices ever devised. Current propellers are already 85-90% efficient, "20%" increases are physically impossible--bragging about "90% efficiency" is like selling the ashtrays in your new car--it's there, but so what?. Gear boxes are already 98% efficient; "direct drive" systems aren't going to pay their way, let alone save fuel. Sloughing "polymers" isn't very likely--you're going to inject polluting hydrocarbon-based compounds into the world's oceans and call it "green"? Electrohydrodynamics have been "just around the corner" for 40 years and the US Patent office is still refusing Tom Rearden a patent as they won't patent perpetual motion.

There are very real problems in energy and especially transportation energy, but magic isn't going to do the trick. It's going to be very hard to avoid nuclear power generation, afloat and ashore, unless the best minds (some among you guys) go to work on the actual problems and possible solutions, and set the science fiction aside. (No, I'm not blowing my own horn here. Wind power has a great future in marine transport, and kites offer compelling advantages over masted sails, but wind power will be an assistive technology until petroleum prices rise much higher, rather than a prime mover)

In the meantime, thanks for a great read.

Dave

[Ari]

Hallo kite ship.
Is there really a kite that can tow/sail a 300tonnage ship at very reasonable cost compare to nowadays sail cost at the moment ? I had found theory and application for very small size 'boat' and the spinnaker style for bigger boat. I'am very keen to utilise this sail for our family round the world project.Sorry I'am interested only in the real product not on discussion on wether kite can sail/tow a ship.Very keen to know.

[safewalrus]

What's wrong with magik - keeps you lot going at times!!

[Wellydeckhand]

Witches and Wizards on holiday walrus.......... left their broom behind........ lets clean up the thread......

[kach22i]

Memo to Editors: Navy Christens the Advanced Electric Ship Demonstrator
http://www.onr.navy.mil/media/article.asp?ID=97

Released: 8/23/2005

Point of Contact:
Kate Shirley
Office of Naval Research
Corporate Communications Office
Phone: 703-696-0738
Fax: 703-696-5940
E-mail: onrpao@onr.navy.mil



What: Christening of the Advanced Electric Ship Demonstrator
When: Wednesday, August 24, 2005
9 a.m., PDT – Media availability
10 a.m. – Christening ceremony
Where: Naval Surface Warfare Center Carderock Division
Acoustic Research Detachment
Lake Pend Oreille
33964 N. Main Ave.
Bayview, Idaho


Arlington, Va.—The Office of Naval Research announces the christening of the Advanced Electric Ship Demonstrator (AESD) on August 24, 2005. The ceremony will take place at the Naval Surface Warfare Center Carderock Division, Acoustic Research Detachment in Bayview, Idaho.

Chief of Naval Research Rear Admiral Jay M. Cohen will deliver the principle address at the christening. The ship’s sponsor is Kathleen Harper, wife of Thurman Harper, vice president of engineering for Rolls-Royce Naval Marine, Inc. In the time-honored Navy tradition, she will break a bottle of champagne across the bow to formally christen the ship "Sea Jet."

The 133-foot vessel will serve as a model representing a destroyer-size surface ship and will be launched on Lake Pend Oreille, Idaho, where it will be used for test and demonstration of various technologies. An underwater discharge waterjet from Rolls-Royce Naval Marine, Inc., called AWJ-21 ™, will be among the first technologies tested. It allows vessels to operate in shallow water with increased maneuverability and stealth.

Following demonstration of the AWJ-21, the RIMJET propulsor from General Dynamics Electric Boat will be installed in Sea Jet for evaluation. The RIMJET is a novel type of podded propulsion system that relies on a permanent magnet motor to drive the propellor.

Reporters wishing to attend should identify themselves as press at the front gate. Photos and video footage will be available shortly after the event from ONR’s online media gallery at http://www.onr.navy.mil/media/.

[Guillermo]

Thanks, kach22i. Most interesting.

"The AWJ-21 is designed to increase ship speed, making hulls sleeker by working without rudders, shafts and propeller struts. Unlike conventional waterjets, the system works completely underwater, reducing noise and surface wake and improving stealth"

http://www.azom.com/details.asp?newsID=3809

Anymore info on the trials of this ship?

[Guillermo]

Originally Posted by Kiteship

...Wind power has a great future in marine transport, and kites offer compelling advantages over masted sails, but wind power will be an assistive technology until petroleum prices rise much higher, rather than a prime mover...

Dave,
Do you think it's feasible to use a kite as an auxiliary propulsion system for a high seas fishing trawler, 70 mts length, 3000 HP, making trips from, let's say, Galicia to Falkland islands' fishing grounds?
(Both for the trip and for the trawling)
Most interested in knowing about this.

[kach22i]

Originally Posted by Guillermo

Thanks, kach22i. Most interesting.

"The AWJ-21 is designed to increase ship speed, making hulls sleeker by working without rudders, shafts and propeller struts. Unlike conventional waterjets, the system works completely underwater, reducing noise and surface wake and improving stealth"

http://www.azom.com/details.asp?newsID=3809

Anymore info on the trials of this ship?

Cool, I was disapointed that the article I found offered no picture. It's kind of ugly, but looks to be Stealth....................special operations craft, a natural choice.