|
Wave Power Ship
A wave-powered ship is a ship, propelled harnessing the energy of the waves. Ships Constructed boats As yet, there is only one boat that is propelled by wave harnessing fins: * Suntory Mermaid II : ''Mermaid II'' uses a passive fin mechanism mounted at the bow. A combination of fins and springs capture wave energy, then release it as a propelling drive forwards. Ship concepts 1. Ship concepts having wave harnessing fins like the "Suntory Mermaid, described above: * ''E/S Orcelle'' A conceptual design for a large car ferry has been projected. This is planned to use wave energy as a minor component of its energy supply, the major source of which is hydrogen fuel. 2. Ships with several hulls, that are movable among one another: * The "Oeko-Trimaran" Maritime Institute Netherlands, archive 2013 Using the pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Suntory Mermaid II
''Suntory Mermaid II'' is a 9.5-metre, 3-tonne catamaran driven by wave power. It features two fin tails which absorb wave energy and generate thrust by moving up and down with the motion of the boat. The ship was designed by Hiroshi Terao of Tokai University. World record On March 16, 2008, then 69-year-old Japanese sailor and environmentalist Kenichi Horie left the Hawaii Yacht Club, Honolulu, in ''Suntory Mermaid II'', bound for Japan. He arrived on July 4, 2008 in the Kii Channel offshore of Hinomisaki cape, Wakayama, without incident. Horie had made the world's longest solo voyage in a wave-powered boat, using green technology.Japanese sailor first to cross Pacific in wave-powered boat, AFP The non-stop voyage across the Western Pacific Ocean took 110 days and covered 7,000 kilometres (3,780 nautical miles). During the voyage, Horie ate mostly rice, curry, squid and flying fish he caught. The 9.5 metre (31-foot), three-ton yacht used wave energy to move two fins at its bow a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Hydrogen Fuel
The hydrogen economy is an umbrella term for the roles hydrogen can play alongside low-carbon electricity to reduce emissions of greenhouse gases. The aim is to reduce emissions where cheaper and more energy-efficient clean solutions are not available. In this context, ''hydrogen economy'' encompasses the production of hydrogen and the use of hydrogen in ways that contribute to phasing-out fossil fuels and limiting climate change. Hydrogen can be produced by several means. Most hydrogen produced today is ''gray hydrogen'', made from natural gas through steam methane reforming (SMR). This process accounted for 1.8% of global greenhouse gas emissions in 2021.Greenhouse gas emissions totalled 49.3 Gigatonnes CO2e in 2021. ''Low-carbon hydrogen'', which is made using SMR with carbon capture and storage ('' blue hydrogen''), or through electrolysis of water using renewable power ('' green hydrogen''), accounted for less than 1% of production. Virtually all of the 100 million tonnes of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Pelamis Wave Power
Pelamis Wave Power designed and manufactured the Pelamis Wave Energy Converter – a technology that uses the motion of ocean surface waves to create electricity. The company was established in 1998 and had offices and fabrication facilities in Leith Docks, Edinburgh, Scotland. It went into administration in November 2014. History The company was founded in 1998 by Richard Yemm, Chris Retzler and David Pizer with the aim of commercialising the Pelamis Wave Energy Converter. Originally named 'Ocean Power Delivery', the company changed its name in September 2007. In 20 the company installed and tested their first full-scale prototype at the European Marine Energy Centre in Orkney, Scotland, becoming the first commercial scale, offshore, wave power machine to successfully generate electricity into the national grid. A commercial order for three 750 kW machines followed this successful demonstration of the Pelamis technology, resulting in the installation of three Pelamis Wav ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Hydrogen-powered Ship
A hydrogen-powered ship is a vessel that uses hydrogen as a fuel source, typically in the form of compressed gas or liquid hydrogen. These ships generate propulsion and onboard power through fuel cells or internal combustion engines adapted to burn hydrogen. As the maritime industry seeks to reduce greenhouse gas emissions, hydrogen is being explored as a cleaner alternative to conventional marine fuels like diesel or heavy fuel oil. Hydrogen-powered vessels produce little to no direct emissions, with fuel cells emitting only water vapor, making them a promising option for decarbonizing shipping. While still in the early stages of adoption, several demonstration projects, ferries, and small commercial ship have already begun operating on hydrogen, and research continues into scaling the technology for larger ocean-going ships. World's First Norway Hydrogen Powered Ship Norway is driving a significant technological shift in the marine industry with its ambitious goal to require ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Marine Current Power
Marine currents can carry large amounts of water, largely driven by the tides, which are a consequence of the gravitational effects of the planetary motion of the Earth, the Moon and the Sun. Augmented flow velocities can be found where the underwater topography in straits between islands and the mainland or in shallows around headlands plays a major role in enhancing the flow velocities, resulting in appreciable kinetic energy. The Sun acts as the primary driving force, causing winds and temperature differences. Because there are only small fluctuations in current speed and stream location with minimal changes in direction, ocean currents may be suitable locations for deploying energy extraction devices such as turbines. Other effects such as regional differences in temperature and salinity and the Coriolis effect due to the rotation of the earth are also major influences. The kinetic energy of marine currents can be converted in much the same way that a wind turbine extracts ene ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Marine Propulsion
Marine propulsion is the mechanism or system used to generate thrust to move a watercraft through water. While paddles and sails are still used on some smaller boats, most modern ships are propelled by mechanical systems consisting of an electric motor or internal combustion engine driving a propeller, or less frequently, in pump-jets, an impeller. Marine engineering is the discipline concerned with the engineering design process of marine propulsion systems. Human-powered watercraft, Human-powered paddles and oars, and later, sails were the first forms of marine propulsion. Rowed galleys, some equipped with sail, played an important early role in early human seafaring and naval warfare, warfare. The first advanced mechanical means of marine propulsion was the marine steam engine, introduced in the early 19th century. During the 20th century it was replaced by two-stroke diesel engine, two-stroke or four-stroke diesel engines, outboard motors, and gas turbine engines on faster sh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Wave Power
Wave power is the capture of energy of wind waves to do useful mechanical work, work – for example, electricity generation, desalination, or pumping water. A machine that exploits wave power (physics), power is a wave energy converter (WEC). Waves are generated primarily by wind passing over the sea's surface and also by tidal forces, temperature variations, and other factors. As long as the waves propagate slower than the wind speed just above, energy is transferred from the wind to the waves. Air pressure differences between the windward and leeward sides of a wave crest (physics), crest and surface friction from the wind cause shear stress and wave growth. Wave power as a descriptive term is different from tidal power, which seeks to primarily capture the energy of the current caused by the gravitational pull of the Sun and Moon. However, wave power and tidal power are not fundamentally distinct and have significant cross-over in technology and implementation. Other forces ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Windmill Ship
A windmill ship, wind energy conversion system ship or wind energy harvester ship propels itself by use of a wind turbine to drive a propeller. They use wind power through a mechanical or electrical transmission to the propeller. Where transmission is electric, storage batteries may also be used to allow power generated at one time to be used for propulsion later on. Windmill ships should not be confused with rotor ships, which instead rely on the Magnus effect for propulsion. Points of sail Equipped with a wind conversion device that can rotate 360° no matter in which direction the ship is heading, a windmill ship can sail in any direction. * It can move directly upwind, a point of sailing unachievable by other sailing craft. Here a wind turbine powers a water propeller. Because the power produced depends on the apparent wind strength, a large amount of power is transmitted to the propeller. In order to operate efficiently in the typically slow speed through the water, the p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Wind-powered Vehicle
Wind-powered vehicles derive their power from sails, kites or wind turbine, rotors and ride on wheels—which may be linked to a wind-powered rotor—or runners. Whether powered by sail, kite or rotor, these vehicles share a common trait: As the vehicle increases in speed, the advancing airfoil encounters an increasing apparent wind at an angle of attack that is increasingly smaller. At the same time, such vehicles are subject to relatively low forward resistance, compared with traditional sailing craft. As a result, such vehicles are often capable of speeds exceeding that of the wind. Rotor-powered examples have demonstrated ground speeds that exceed that of the wind, both directly ''into the wind'' and directly ''downwind'' by transferring power through a drive train between the rotor and the wheels. The wind-powered speed record is by a vehicle with a sail on it, ''Greenbird'', with a recorded top speed of . Other wind-powered conveyances include sailing vessels that travel on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Ship Types
A ship is a large vessel that travels the world's oceans and other navigable waterways, carrying cargo or passengers, or in support of specialized missions, such as defense, research and fishing. Ships are generally distinguished from boats, based on size, shape, load capacity and purpose. Ships have supported exploration, trade, warfare, migration, colonization, and science. Ship transport is responsible for the largest portion of world commerce. The word ''ship'' has meant, depending on the era and the context, either just a large vessel or specifically a ship-rigged sailing ship with three or more masts, each of which is square-rigged. The earliest historical evidence of boats is found in Egypt during the 4th millennium BCE. In 2024, ships had a global cargo capacity of 2.4 billion tons, with the three largest classes being ships carrying dry bulk (43%), oil tankers (28%) and container ships (14%). Nomenclature Ships are typically larger than boats, but there is no ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
