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Renewable energy sources

Renewable energy is energy which comes from natural resources such as sunlight, wind, rain, tides, and geothermal heat, which are renewable  (naturally replenished). In 2008, about 19% of global final energy consumption came from renewables, with 13% coming from traditional biomass, which is mainly used for heating, and 3.2% from hydroelectricity.

Alternative energy guides
Alternative energy guides

New renewables (small hydro, modern biomass, wind, solar, geothermal, and biofuels) accounted for another 2.7% and are growing very rapidly. The share of renewables in electricity generation is around 18%, with 15% of global electricity coming from hydroelectricity and 3% from new renewables.

During the five-years from the end of 2004 through 2009, worldwide renewable energy capacity grew at rates of 10-60 percent annually for many technologies. For wind power and many other renewable technologies, growth accelerated in 2009 relative to the previous four years. More wind power capacity was added during 2009 than any other renewable technology.

However, grid-connected PV increased the fastest of all renewables technologies, with a 60-percent annual average growth rate for the five-year period.

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Geothermal Electricity

Geothermal power is considered to be sustainable because the heat extraction is small compared to the Earth’s heat content, but extraction must still be monitored to avoid local depletion. Although… Read more

Released on Aug 14, 2011

Renewable Energy

Renewable energy sources – solar, wind, biomass, geothermal and hydro – could make important contributions to sustainable development. Currently, their exploitation in commercial markets is low, being constrained by costs… Read more

Released on Jan 23, 2011

Passive Solar Buildings

A passive solar building is one that derives a substantial fraction of its heat from the sun using only natural processes to provide the necessary energy flows. Thermal conduction, free… Read more

Released on Oct 03, 2010

Small Hydroelectric Plants

For generations water has been used as a source of energy by industry and by a limited number of utility companies. In the continental United States, most rivers and streams… Read more

Released on Sep 23, 2010

A Guide To UK Mini-Hydro Developments

This Guide is designed to assist anyone in the UK who is planning to develop a small-scale hydro-electric scheme. It has been prepared by the British Hydropower Association in order… Read more

Released on Sep 22, 2010

10 Comments


  1. Mohamed Omar Morad
    Nov 23, 2017

    Dear Sir,
    Please Show the SAVE button for saving the articles. Regards


  2. khaled
    May 29, 2016

    The world needs a change now…we have to conserve our nature at any cost…we should use solar power, hydro power and wind power to save the world


  3. NK Bokade
    Jun 23, 2015

    Dear Sir,
    Kindly share the complete guide for design and installation and commissioning of mega watt solar power plant.
    regards


  4. androwregan
    May 29, 2015

    dear sir.

    why the motors are designed 1.1 kw 2.2 kw3.7 kw like that designed..
    and also fuse rating 1a 2a 6a 10a 16a 32a etc… please give the reasons..


  5. AYENEW
    Mar 25, 2015

    NICE FOR ALL


  6. godfrey
    Jun 01, 2014

    i would information on submissible solar pumps im from zimbabwe. i would like to pump under ground water. im an electrical artisan.
    your help will be greatly appreciated


  7. Arun Bankar
    Jan 30, 2014

    We have many solar panels,i want to develop led street light,solar water pump(it is of ac type Three phase) so please send me a book or software or any detailed guidance so that i can implement that …
    i have basic knowledge of their development but i want professional details like what should be the wire MOC,type, what will be the losses? selection of battery with most optimum losses etc. so please help me in that direction

    thanks


  8. parmar nikhil
    Apr 01, 2013

    Dear sir,

    We have many solar panels,i want to develop led street light,solar water pump(it is of ac type single phase) so please send me a book or software or any detailed guidance so that i can implement that …
    i have basic knowledge of their development but i want professional details like what should be the wire MOC,type, what will be the losses? selection of battery with most optimum losses etc. so please help me in that direction

    thanks

    nikhil parmar..
    [email protected]


  9. vijay chakrawar
    Jun 18, 2012

    Dear Friend, I want to aware about solar applications, as the people thinks its much expensive, but today its affordable . As the cost of solar panels came down i.e. Rs.45/- per Wp. Also the balance of system is available every where. So only we have to get it connect it & use. So please start to use it.
    I am integrator, till date installed 1500 solar street lights & 56 solar dual pumps for village drinking systems.


    • rudra
      Mar 18, 2014

      hi vijay
      i want to instal solar power for house hold purpose. please guide me how to make or assemble to get it done. this will help me lot.

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