PLEASE NOTE:

MyNews24 is a user-generated section of News24.com. The stories here come from users.

 
ZION
 
Comments: 11
Article views: 911
 
 
Latest Badges:



 
View all ZION's badges.
 

Wind turbines less efficient than claimed

03 November 2012, 15:03

WIND  TURBINES  LESS EFFICIENT THAN  CLAIMED     

The use of coal and nuclear energy to drive power stations has attracted more and more dissension in the power generating industry.  The obvious solution which usually arises from discussion in the field is ”Use wind power ”The use of wind power may have its advantages but, too, its disadvantages. The obvious disadvantage is lack of wind and a second important disadvantage is the poor efficiency to be had from Wind turbines and on wind farms. People seldom equate efficiency with the kinetic energy of the wind.

A study was carried out to determine the wind energy generated by dozens of wind farms, the majority which are in Scotland .between November 2009 and 2010.  Overall they actually ran at 22% of capacity.It is commonly expected that the wind farm runs at 33% capacity over a period of a year.

BETZ  LAW      According to BETZ LAW, No turbine can capture more than 59,3%Of the kinetic energy of the wind.  The factor 16/27 (0,593)  Is known as Betz’s coefficient. Practical utility scale wind turbines achieve at peak 75% To 80% of the Betz limit.  The Betz limit places an upper boundary on the annual limit that can be extracted at a site.    

World’s most efficient wind turbine in its class:GE’S1,6 - 100 wind turbine, 1,5MW. 31 turbines will be used in Turkey to power 14*000 Turkish households.    

The turbine power is approximately proportional to the third power of the wind velocity.  Many engineers feel that the overall design of turbines is still far from optimal.    

Total wind power could be captured only if the wind velocity is reduced to zero.  In a realistic turbine this is impossible as the captured air must leave the turbine.  A relation between input and output wind velocity must be considered.  The maximal achievable extraction of wind power by a wind turbine is 59,3 % of the total theoretical wind power.    

In many cases, but it is not the norm, that fuel powered stations are cheaper than wind powered station. This is applicable to islands and coastal stations. This may have to do with corrosion caused by humidity and salt in the atmosphere.     

Wind power costs may be constant over the entire life time of the unit while that of say coal may increase by more than double over its lifetime.Additional costs are due to increasing fuel costs and labour costs. Coal fired powers stations must bear the costs of CO2  emissions, combating it . and costs in accordance with international standards

Disclaimer: All articles and letters published on MyNews24 have been independently written by members of News24's community. The views of users published on News24 are therefore their own and do not necessarily represent the views of News24. News24 editors also reserve the right to edit or delete any and all comments received.
 

Read News24’s Comments Policy

24.com publishes all comments posted on articles provided that they adhere to our Comments Policy. Should you wish to report a comment for editorial review, please do so by clicking the 'Report Comment' button to the right of each comment.

Comment on this story
11 comments
Add your comment
Comment 0 characters remaining

Read more from our Users

Submitted by
Sue.r.byron-moore
True colours

It can never be said that living in Africa is boring. At the risk of causing offence to countless people, Africa is very colourful. Read more...

0 comments 105 views
Submitted by
Jimbo Slim
Atheists, get your priorities str...

Sure, it means something to its followers in church and in their homes, but outside of lala-land, in the REAL world, it means nothing. Why does it mean nothing?  Read more...

20 comments 271 views
Submitted by
MikeHampton
Judge Criticises ANC/DA Battles C...

The battle between the ANC and the DA for Plettenberg Bay and Oudtshoorn has been legal vicious, costing a fortune that has far too often fallen on the shoulders of overburdened taxpayers.  Read more...

0 comments 70 views
Submitted by
Godless Heathen
Prayer works if you speak to the ...

So I have been working hard, but cashflow is a little screwy. I decided to test prayer and see what happens. The first thing I did was make a list of God's to speak to. Read more...

81 comments 2167 views
Submitted by
Thulane Che Trosky
Zuma’s silence is the proof…

Zuma sets the highest standards for unaccountability in his administration. The spy tapes set the tone.  Read more...

9 comments 2299 views
Submitted by
Helgavan
5 Banting principles even the cri...

But there are (at least) 5 things which every eater can employ, that even the biggest critics of Banting cannot argue with. Read more...

8 comments 1507 views

Jobs in Cape Town [change area]

Property [change area]

Travel - Look, Book, Go!

Magical Massinga

Spend 5 nights at the gorgeous Massinga Beach Lodge in Mozambique and only pay for 4 from R13 220 per person sharing. Includes return flights, accommodation, transfers and romantic turndown. Book now!

Kalahari.com - shop online today

Up to 40% off fashion accessories

Save up to 40% on selected handbags, purses, watches, jewellery and more. Offer valid while stocks last. Shop now!

Save up to R2000 on top electronics

Get every day mind bowing savings on top electronics. Offer valid while stocks last. Shop now!

As seen on TV - New book releases at only R199 each

Get mind blowing book savings on new titles. Offer valid while stocks last. Shop now!

Save up to 50% on Women’s month treats!

Celebrate the awesome women in your life with awesome treats like beauty products, fashion accessories, bestselling books, electronics and more. Offer valid while stocks last. Shop now!

Up to 60% off - clearance sale!

Save up to 60% on appliances, books, electronics, toys, movies and more. Offer valid while stocks last. Shop now!

OLX Free Classifieds [change area]

Samsung Galaxy s4

Mobile, Cell Phones in South Africa, Western Cape, Cape Town. Date October 24

Best bargain in big bay

Real Estate, Houses - Apartments for Sale in South Africa, Western Cape, Cape Town. Date October 25

VW Golf 6, 1.6 Trendline (Excellent condition)

Vehicles, Cars in South Africa, Western Cape, Cape Town. Date October 25

 

services

E-mail Alerts The latest headlines in your inbox

RSS feeds News delivered really simply.

Mobile News24 on your mobile or PDA

E-mail Newsletters You choose what you want

News24 on your iPhone Get News24 headlines on your iPhone.

SMS Alerts Get breaking news stories via SMS.

Blogs Your opinion on you, me and everyone.

Calais Website keywords automated by OpenCalais.

 
Interactive Advertising Bureau
 
© 2014 24.com. All rights reserved.
There are new stories on the homepage. Click here to see them.
 
English
Afrikaans
isiZulu

Hello 

Create Profile

Creating your profile will enable you to submit photos and stories to get published on News24.


Please provide a username for your profile page:

This username must be unique, cannot be edited and will be used in the URL to your profile page across the entire 24.com network.

Settings

Location Settings

News24 allows you to edit the display of certain components based on a location. If you wish to personalise the page based on your preferences, please select a location for each component and click "Submit" in order for the changes to take affect.








Facebook Sign-In

Hi News addict,

Join the News24 Community to be involved in breaking the news.

Log in with Facebook to comment and personalise news, weather and listings.