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New technology may reduce wind energy costs

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London, The efficiency of wind turbines can be increased and repair costs reduced through a new technique developed by engineers from the University of Sheffield.

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The novel technique can predict when bearings inside wind turbines fail which could make wind energy cheaper.

Unexpected bearing failures are a common problem in wind turbines.
“By removing the risk of a loss of production and the need for unplanned maintenance, it can help to reduce the cost of wind energy and make it much more economically competitive,” said co-author of the paper professor Rob Dwyer-Joyce.
The method, developed by mechanical engineering research student Wenqu Chen, uses ultrasonic waves to measure the load transmitted through a ball bearing in a wind turbine.
The stress on wind turbine is recorded and then engineers can forecast its remaining service life.
When a bearing is subjected to a load, its thickness is reduced by a very small amount due to elastic deformation, and the speed of sound is affected by the stress level in the material. Both these effects change the time of flight of an ultrasound wave through a bearing.
The new method is the only way to directly measure the transmitted load through the rolling bearing components.
It uses a custom-built piezoelectric sensor mounted in the bearing to measure the time of flight and determine the load.
This sensor is less expensive and significantly smaller than currently available, making it suitable for smaller turbines.
It can also provide a better prediction of the maintenance needed, saving money in servicing, researchers said.
The study was published in the journal Proceedings of the Royal Society.

(IANS)

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84% Indians Hope to Retain Their Jobs Despite Automation: WEF

Indians see automation, but hopeful of keeping jobs

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Indians jobs
Although majority of Indians think their jobs would be automated in the next 10 years, 84 per cent hope to retain their jobs. (Representational Image) Pixabay

Although majority of Indians think their jobs would be automated in the next 10 years, 84 per cent hope to retain their jobs, supported by their skills, according to a report by World Economic Forum (WEF) and Ipsos.

India tops the list in terms of expectation of jobs automation, as around 71 per cent respondents expect their jobs to be automated. Saudi Arabia comes second with 56 per cent respondents expecting jobs getting automated, and in China 55 per cent respondents feel the same.

“Interestingly, 84 per cent of urban Indians polled are confident of keeping their jobs, using the skills they possess. The survey also shows across all markets, Indians are most confident, followed by the Netherlands (83 per cent) and the US (82 per cent),” the report said.

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Indians realise while automation is likely they know it will act as an enabler to improve efficiencies in deliverability. Pixabay

The markets least confident of holding onto their jobs in the face of automation, include Japan (23 per cent), South Korea (33 per cent) and Russia (50 per cent).

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Commenting on the survey, Parijat Chakraborty of Ipsos India said, “Indian job market is hierarchy driven, promotions are skills and performance-led. Indians realise while automation is likely they know it will act as an enabler to improve efficiencies in deliverability; human intellect, skill-sets and capital will still be needed to get the job done.” (IANS)

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