Browsing by Keyword "Cryogenics"
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Item Application of MgB2 in superconducting wind turbine generators(2014) Pujana, A.; Marino, I.; Sarmiento, G.; Sanz, S.; Merino, J. M.; Villate, J. L.; DIGITAL ENERGY; Tecnalia Research & Innovation; GENERALOffshore wind market demands higher power rate and more reliable turbines in order to optimize capital and operational costs. The state-of-the-art shows that both geared and direct-drive generators are difficult to scale up to 10 MW and beyond. Their huge size and weight would drive up the cost of both fixed and floating foundations, as well as installation, operation and maintenance costs. New solutions to provide better power scalability, topside weight reduction and reliability are needed. Superconducting materials arise as a prominent solution for lightweight, high power wind generators construction [1]. There are already several superconducting generator concepts, but they face important challenges as cost, complexity and reliability. This work presents the application of MgB2 superconducting wire in an innovative 10 MW class lightweight, robust and reliable generator for wind turbines, which gives answer to the offshore sector demands while overcomes other superconducting generators challenges.Item Design and construction of the cryogenic cooling system for the rotating magnetic validator of the 10 MW SUPRAPOWER Offshore superconducting wind turbine(2018-04) Sun, Jiuce; Neumann, Holger; Sanz, Santiago; Sarmiento, Gustavo; Tropeano, Matteo; Marino, Iker; Pujana, Ainhoa; Merino, Jose María; Tecnalia Research & Innovation; DIGITAL ENERGYThe SUPRAPOWER, an EU FP7 funded research project, is developing an innovative 10 MW class superconducting generator to provide an important breakthrough in the offshore wind industry. The 10 MW generators adopts modular concept to the superconducting coil and associated cryogenic systems. And the modular superconducting coil and cryostat of this novel generator will be validated through a scale-down rotating magnetic validator (RMV). The cryogenic cooling system for the RMV consists of two modular cryostats: a distributing cryostat and the corresponding rotating cryocooler system with a self-developed rotary joint. In order to achieve the SC coils’ working temperature of 20 K, a two-stage G–M cryocooler will be applied and linked to the two modular cryostats by way of a conductive copper connection. The distributing cryostat was developed to envelop the cold head of the cryocooler, thermal link, and three binary current leads to electrically feed the coils. A rotary joint with Ferrofluid sealing was developed to transfer the helium gas between the rotating cold head and stationary oil-lubricated compressor. In this paper, the design, manufacture, and assembly of this cryogenic system for RMV will be presented in detail.