 | |
| Type | Subsidiary |
|---|---|
| Industry | Wind power |
| Founded | 2006 |
| Defunct | 19 February 2020 |
Key people | Saul Griffith, Corwin Hardham, Donald Montague, Damon Vander Lind |
Number of employees | 20+ |
| Parent | Alphabet Inc. |
| Website | makanipower.com |
Makani Technologies LLC was an Alameda, California-based company that developed airborne wind turbines. [1] Founded in 2006, Makani was acquired by Google in May 2013. In February 2020, Makani was shut down by Alphabet, Google's parent company.
Makani was founded in 2006 by Saul Griffith, Don Montague, and Corwin Hardham. [2] It received funding as part of Google.org's Renewable Energy cheaper than Coal (RE<C) initiative. [3] "Makani" is Hawaiian for "wind." [4] Corwin Hardham died in 2012 at age 38. [5] On 23 May 2013, Makani Power was acquired by Google and was folded into Google X. [6] In 2015, Fort Felker, former director of the National Wind Technology Center at the National Renewable Energy Laboratory (NREL) was hired as CEO. [7]
In December 2016, Makani operated for the first time a 600 kW prototype with 28 meter wing span. [8] [9]
Starting August 2018, Makani operated an energy kite test site on the Big Island of Hawaii. [10]
In February 2019, Makani was separated from X and made into a subsidiary of Alphabet. At the same time, Royal Dutch Shell made a minority investment in Makani and began a partnership with the company to develop its business. [11]
In 2019 the offshore energy kite was lost during testing. Investigation and reporting on the technical details of the mishap was undertaken. The wing did not successfully land on the platform resulting in the loss of the energy kite. [12] [13]
In February 2020, Alphabet shut down Makani. The company said "Despite strong technical progress, the road to commercialization is longer and riskier than hoped." [14] In September 2020, Makani released the Energy Kite Collection — a three-part report and accompanying collection of open source code repositories, flight logs and technical videos from the project. It also released Pulling Power from the Sky: The Story of Makani, a documentary on the project, and made a non-assertion pledge on its patent portfolio, allowing anyone to use its patents without fear of legal reprisal. [15] [16]
In order to meet its goal of producing low-cost renewable energy, the Makani kite-energy system used autonomous tethered wings which flew in a circular path and generated electricity via wind turbines mounted upon the main wing, a method known as crosswind kite power, originally envisioned by Miles Loyd in a 1980 paper. Loyd stated that for large scale purposes flying the generators was expected to be disfavored because of the need to fly the mass of the generators; [17] many of Makani Power competitors have generators kept on the ground, like KiteGen, Italy. [18] The electricity is generated on the ground in the tether, utilising tension in the cable connected to the kite. [19]
Wind power is the use of wind energy to generate useful work. Historically, wind power was used by sails, windmills and windpumps, but today it is mostly used to generate electricity. This article deals only with wind power for electricity generation. Today, wind power is generated almost completely with wind turbines, generally grouped into wind farms and connected to the electrical grid.
Vestas Wind Systems A/S is a Danish manufacturer, seller, installer, and servicer of wind turbines that was founded in 1945. The company operates manufacturing plants in Denmark, Germany, the Netherlands, Taiwan, India, Italy, Romania, the United Kingdom, Spain, Sweden, Norway, Australia, China, Brazil, Poland and the United States, and employs 29,000 people globally.
An airborne wind turbine is a design concept for a wind turbine with a rotor supported in the air without a tower, thus benefiting from the higher velocity and persistence of wind at high altitudes, while avoiding the expense of tower construction, or the need for slip rings or yaw mechanism. An electrical generator may be on the ground or airborne. Challenges include safely suspending and maintaining turbines hundreds of meters off the ground in high winds and storms, transferring the harvested and/or generated power back to earth, and interference with aviation.
Airborne wind energy (AWE) is the direct use or generation of wind energy by the use of aerodynamic or aerostatic lift devices. AWE technology is able to harvest high altitude winds, in contrast to wind turbines, which use a rotor mounted on a tower.
Google.org, founded in October 2005, is the charitable arm of Google, a multinational technology company. The organization has committed roughly US$100 million in investments and grants to nonprofits annually.
Unconventional wind turbines are those that differ significantly from the most common types in use.
Wind power is a branch of the energy industry that has expanded quickly in the United States over the last several years. From January through December 2022, 434.8 terawatt-hours were generated by wind power, or 10.25% of electricity in the United States. The average wind turbine generates enough electricity in 46 minutes to power the average American home for one month. In 2019, wind power surpassed hydroelectric power as the largest renewable energy source in the U.S.
The Wave Hub is a floating offshore wind and wave power research project. The project is developed approximately 10 miles (16 km) off Hayle, on the north coast of Cornwall, United Kingdom. The hub was installed on the seabed in September 2010, and is a 'socket' sitting on the seabed for wave energy converters to be plugged into. It will have connections to it from arrays of up to four kinds of wave energy converter. A cable from the hub to main land will take electrical power from the devices to the electric grid. The total capacity of the hub will be 20 MWe. The estimated cost of the project is £28 million.
A laddermill kite system is an airborne wind turbine consisting of a long string or loop of power kites. The loop or string of kites would be launched in the air by the lifting force of the kites, until it is fully unrolled, and the top reaches a height determined by designers and operators; some designers have considered heights of about 30,000 feet, but the concept is not height-dependent. The laddermill method may use one endless loop, two endless loops, or more such loops.
SkySails Group GmbH is a Hamburg-based company that sells kite rigs to propel cargo ships, large yachts and fishing vessels by wind energy as well as airborne wind energy systems for electricity production from high-altitude winds.
China is the world leader in wind power generation, with the largest installed capacity of any nation and continued rapid growth in new wind facilities. With its large land mass and long coastline, China has exceptional wind power resources: Wind power remained China's third-largest source of electricity at the end of 2021, accounting for 7.5% of total power generation.
GE Wind Energy is a branch of GE Renewable Energy, a subsidiary of General Electric. The company manufactures and sells wind turbines to the international market. In 2018, GE was the fourth largest wind turbine manufacturer in the world.
A tidal stream generator, often referred to as a tidal energy converter (TEC), is a machine that extracts energy from moving masses of water, in particular tides, although the term is often used in reference to machines designed to extract energy from run of river or tidal estuarine sites. Certain types of these machines function very much like underwater wind turbines, and are thus often referred to as tidal turbines. They were first conceived in the 1970s during the oil crisis.
Squid Labs was an American independent research and development company founded by a group of four MIT graduates. In 2004, Colin Bulthaup, Dan Goldwater, Saul Griffith, and Eric Wilhelm moved from the East Coast to California to found the company known as Squid Labs. During its years of existence from 2004 to 2007, Squid Labs added three more members to its team: Geo Homsy, Corwin Hardham and Ryan McKinley. Working out of a warehouse in Emeryville, the group adopted the slogan "We're not a think tank, we're a do tank." and created a handful of patents and inventions including an electronically sensed rope, portable pull-cord generators, and a machine that could manufacture eyeglasses of any prescriptions at extremely low cost. Squid Labs was also the birthplace for many companies still running today, such as Makani Power and Howtoons. Although the company no longer exists, Squid Lab's co-founder, Saul Griffith created a similar company in San Francisco named Otherlab.
X Development LLC, doing business as X, is an American semi-secret research and development facility and organization founded by Google in January 2010. X has its headquarters about a mile and a half from Alphabet's corporate headquarters, the Googleplex, in Mountain View, California.
The following outline is provided as an overview of and topical guide to wind energy:
Crosswind kite power is power derived from airborne wind-energy conversion systems or crosswind kite power systems (CWKPS). The kite system is characterized by energy-harvesting parts flying transverse to the direction of the ambient wind, i.e., to crosswind mode; sometimes the entire wing set and tether set is flown in crosswind mode. From toy to power-grid-feeding sizes, these systems may be used as high-altitude wind power (HAWP) devices or low-altitude wind power (LAWP) devices without having to use towers. Flexible wings or rigid wings may be used in the kite system. A tethered wing, flying in crosswind at many times wind speed, harvests wind power from an area that exceeds the wing's total area by many times.
Donald Lewis Montague is a Canadian-American watersport athlete and designer. He is President of Kai Concepts, co-founder of Makani Power, and the head of the Kiteboat Project in Alameda, California.
Kitepower is a registered trademark of the Dutch company Enevate B.V. developing mobile airborne wind power systems. Kitepower was founded in 2016 by Johannes Peschel and Roland Schmehl as a university spin-off from the Delft University of Technology’s airborne wind energy research group established by the former astronaut Wubbo Ockels. The company is located in Delft, Netherlands, and currently comprises 18 employees (2018).
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