Growian
| GROWIAN | ||
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Annual net output 12 GWh | | |
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Growian or GROWIAN (short for German "Große Windenergieanlage" - "Large wind turbine") was a publicly funded
For a long time Growian was the world's largest wind turbine. Many features of the installation were novel and had not previously been trialled at this scale. Due to manufacturing faults in the casing, the turbine could not be run at full performance, and various issues with materials and construction prevented continuous testing. Consequently, the installation was idle for the greater part of the period between the first test run on 6 July 1983 (official start of operations was 4 October 1983[1]) and end of operations in August 1987. Growian was decommissioned over the course of 1987, and dismantled in summer 1988.
Technical data
Growian's power rating was 3,000 kW, at the time the highest in the world. The rotor had an oscillating nave, a diameter of 100.4 metres (329 ft), and revolved at approximately 19.5 rpm. The orientation of the two blades was regulated by a mechanical-electrical mechanism. In contrast to most modern turbines, the blades rotated on the leeward side of the tower.[2][3]
The turbine house at a height of 100 metres (330 ft) weighed 340 t, and each blade weighed 23 t.[4]
The turbine had a switching on speed of 5.4 metres per second (18 ft/s) and a rated speed of 12 metres per second (39 ft/s). It would cut out at a speed of 24 metres per second (79 ft/s) and was rated for a maximum survivable speed of 60 metres per second (200 ft/s). Projected annual energy yield at a mean wind speed of 9.3 metres per second (31 ft/s) was approximately 12 GWh.[3]
Rotor and
The tower and one of the rotors are on display at the
The total cost of the installation was about 87 million Deutsche Mark.[5]
Development and outcomes
Towards the end of 1976, the German
Overall and technical direction were the responsibility of HEW, while Schleswag dealt with commercial management. The basic contract between the partners of 3 January 1978 stipulated that after the project's conclusion, the installation was "anticipated to be dismantled and scrapped".
The partners as well as the BMFT also had political motives connected with the project. Günther Klätte, management board member of RWE, stated during a general business meeting: "We require Growian [in the general sense of large wind turbines] as a proof of failure of concept", and he noted that "the Growian is a kind of pedagogical tool to convert the anti-nuclear energy crowd to the true faith".[6] A similar statement regarding the incurred financial burdens was reported of Minister of Finance and former Minister of Research Hans Matthöfer: "We know it won't do anything for us. But we do it to demonstrate to the wind energy advocates that it doesn't work."[6] After the Green Party had derided the installation as the electricity provider's "fig leaf" on the occasion of groundbreaking in May 1981, the RWE took internal measures to make sure that publicly a position of open-mindedness towards alternative energy production was emphasized while public interest in wind energy was allayed.
Insuperable structural load and material problems occurred, not least due to the two-bladed lee runner configuration. The installation turned out to be a failure in most respects, spent substantially more time under repair than up and running, and was not even capable of sustained test operation. When it was decommissioned it had only logged a total of 420 hours in active operation.[5]
Growian is regarded as one of the largest failures in the history of wind power and was unable to fulfill any of the expectations riding on its conception. What few insights were gained found little application in wind turbine construction. Some lessons were however learned from conceptional mistakes made in its construction, e.g., the futility of trying to reach profitable installation sizes without taking intermediate steps.[5]
The point of view that multi-MW-yield wind turbines were technically and commercially infeasible gained some currency after the failure of the project, but was eventually superseded by technical progress. Beginning with the late 2000s, twenty-five years after Growian was decommissioned, installations with identical dimensions and yield (100 m rotor diameter, 3 MW net yield) were being produced in large numbers, a class of turbines that has continued to dominate the market and to push forward the mean net yield of newly installed turbines. As of 2015, substantially larger installations with yields up to 8 MW and rotor diameters of up to 170 m are present in the offshore sector. In contrast to Growian, however, these turbine types were incrementally developed from smaller installations in the 0.1 MW range.
Growian's former locations is still being used for wind power generation. In 1988, Germany's first wind farm, the Windenergiepark Westküste, was built on a 20 hectare section of the former test area. It initially comprised 30 smaller turbines with net yields of 10-25 kW, provided by three different wind turbine manufacturers. After being repowered twice, the wind farm today consists of four major installations with 1-2 MW yield, in addition to a test area for small wind turbines and an information center presenting the history of wind power.[7]
References
- ^ "4.10.1983: Windkraftanlage in Betrieb - KalenderBlatt zum 4. Oktober". Deutsche Welle.
- ^ Jörn Pulczynski, Jürgen Hauschildt (1995). "Growian: Zielbildung für bedeutende Innovationsvorhaben". In Klaus Brockhoff (ed.). Management von Innovationen. Planung und Durchsetzung – Erfolge und Mißerfolge (PDF) (in German). Wiesbaden: Gabler. pp. 45–54. Archived from the original on 2010-07-04.
{{cite book}}: CS1 maint: bot: original URL status unknown (link) - ^ a b c "Der schon historische Windenergiekonverter 'GROWIAN' - Growian technical data (in German)".
- ^ Brück, Jürgen (6 September 2007). "20 Jahre Windenergiepark Westküste". energieportal24. Archived from the original on 7 September 2017. Retrieved 6 September 2017.
- ^ ISBN 3-593-35278-8.
- ^ a b Johansen, Anatol (13 December 1982). "Erfolg für das erste Aufwindkraftwerk der Welt". Die Welt. Vol. 289. p. 12.
- ^ "Windenergiepark Westküste".
- Heymann, Matthias (1999). "Der Riese und der Wind: Zum schwierigen Verhältnis des RWE zur Windenergie nach 1945. 3: Das Growian-Desaster 1978–1987". In Helmut Maier (ed.). Elektrizitätswirtschaft zwischen Umwelt, Technik und Politik: Aspekte aus 100 Jahren RWE-Geschichte 1898–1998 (in German). Freiberg: TU Bergakademie. pp. 217–236. ISBN 3-86012-087-5.
- Pulczinsky, Jörn (1991). Interorganisationales Innovationsmanagement. Eine kritische Analyse des Forschungsprojektes GROWIAN (in German). Kiel: Vauk. ISBN 3-8175-0121-8.
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