Practices In Electricity Generation From Hydropower Case Study

Great Essays
Chapter Four
4. Practices in Electricity Generation from Hydropower
Hydropower electricity is the product of transforming potential energy stored in water in an elevated reservoir into the kinetic energy of the running water, then mechanical energy in a rotating turbine, and finally electrical energy in an alternator or generator. Hydropower is a mature renewable power generation technology that offers two desirable characteristics in modern electricity systems: first, built-in storage that enables electricity to be provided on demand and second, a fast response time that allows reserves to be fed into the grid. Hydropower also has an important role to play in producing renewable electricity. It is low-cost and readily available: power flow
…show more content…
The higher the head, the more gravitational energy the water has as it passes through the turbine. Most existing hydropower facilities can convert about 90 percent of the energy of falling water into electricity, which makes hydropower a technically efficient source of …show more content…
The installed low power hydropower capacity in the U.S. is approximately 350 megawatts.
Micro Hydropower Plants: These facilities have a generation capacity of less than 100 kilowatts.
Electricity demand fluctuates during the day and between months depending on different factors, most importantly the hour of the day and temperature. One of the advantages of hydropower over other sources of electricity (e.g., variable wind and solar power or base load coal and nuclear plants) is its generation flexibility. Such flexibility enables hydropower to meet sudden fluctuations in demand or help to compensate for the loss of power from other sources. Hydropower can be used for both base load and peak generation.
4.2. Current Status
Hydropower is the most widely used form of renewable electricity, with 3700TWh generated worldwide in 2012, which accounted 79% of all the electricity produced from renewable sources globally [46]. In 2012, hydropower provided an estimated 16.5% of the world’s electricity. This share is expected to rise to 19% in 2020 and 21% in 2030

Related Documents

  • Improved Essays

    Hydroelectricity is the utilization of flowing water to create electricity, usually through the use of a dam. Wind energy is classified as the use of wind to turn a turbine blade in order to produce electricity (Ellabban et al., 2014). Among all the renewable energies, hydroelectricity is the most widely used as it makes up 85% of the renewable energy market, has a capacity of 970 GW, and produced 3500 TWh of electricity in 2011. This is due mainly to the fact that hydroelectricity produces the cheapest electricity, because of its long history of use and low cost implementation. Wind energy is second among renewable energies with a total capacity of 238 GW.…

    • 789 Words
    • 4 Pages
    Improved Essays
  • Improved Essays

    The hydropower produces electric power through the use of flowing water or the gravitational force. Hydroelectricity is a renewable energy resource; for hydropower to generate electricity it uses the water cycle. For hydropower to generate a lot of electricity it is mostly dependent on elevation and precipitation changes. Large elevation changes and high precipitation levels are essential to generating a significant amount of electricity. Areas such the Pacific Northwest Mountain will be more productive in generating electricity for hydropower than an area such as the Gulf Coast.…

    • 797 Words
    • 4 Pages
    Improved Essays
  • Improved Essays

    Using hydropower energy could be very efficient and inexpensive with the use of modern turbines, the out put of energy could be up to as high as 97%, compared to the best fossil fuel plants are only 50% efficient. Ultimately it pays for itself unlike other alternative forms of fuel. Wind energy, only produced 400,000 megawatts of renewable energy sources. Solar power is the newest in the renewable energy portfolio. Solar panels are expensive and only produce a small amounts of energy and usually it is limited to a single household.…

    • 1021 Words
    • 4 Pages
    Improved Essays
  • Improved Essays

    Benefits Of Green Energy

    • 809 Words
    • 4 Pages

    Between 1860 and the First World War, a range of technologies was developed to generate steam, by capturing the sun 's heat, to run engines and irrigation pumps [5]. Solar Photovoltaic cells are one of the most efficient amongst the different solar conversion alternatives. With China producing one-third of the total solar photovoltaic cells and exporting cheaply more than 95 percent of its produce the cost of the producing reliable and clean energy from the sun has significantly reduced [2]. Also with the rapid development and research in the new materials for usage in the solar panels, the efficiency of solar energy conversion has significantly increased. Other than PV cells for harnessing the Solar technology there are a number of other solar energy technologies that compete in the different energy markets.…

    • 809 Words
    • 4 Pages
    Improved Essays
  • Improved Essays

    Many people have used wind to pump water or grind grain. Large turbines, with about three or four blades, are used to produce electricity. When the blades turn, the center shaft spins and creates the electricity needed to power different industries that own them. Wind energy is the world’s fastest-growing energy technology. Turbines that placed in strong, steady winds can make electricity without pollution.…

    • 998 Words
    • 4 Pages
    Improved Essays
  • Improved Essays

    Renewable energy technologies may be expensive but after many years their economic benefits will appear. The expensive price of renewable energy is paid once while the money spent on fossil fuels is increasing time by time. For examples remote countries who live on river sides wouldn’t have ever been able to produce electricity if not for the dams they have built. It is also known that fossil fuel’s prices are continuing to get higher. In 2000 each gallon of diesel was worth 1.629 dollars.…

    • 1487 Words
    • 6 Pages
    Improved Essays
  • Superior Essays

    But instead of using heat energy to create steam to turn a turbine, hydroelectric dams use the energy generated by gravity on liquid water to turn the turbine. On one side of the dam is a reservoir which holds water at a higher elevation than the river on the other side of the dam. This relatively higher elevation is what gives the water the potential energy to turn the turbine when it begins to flow ("Hydroelectric Energy."). Potential energy is calculated by the force due to gravity multiplied by the change in height of the matter. So, a reservoir of just 10 cubic meters of water that is 50 meters above the river on the other side and flowing at just 1 meter per second, has a potential power of 49,000 watts for every second that it flows.…

    • 1196 Words
    • 5 Pages
    Superior Essays
  • Improved Essays

    By 2015, the renewable energy accounts for 65% of all electricity generated in Canada. Canada has the broad territory and the long coastlines in both west and east, which benefits Canada with a great potential for making further development in application of renewable energy programs. Especially, Wind power, hydraulic power and solar power (both solar photovoltaic and Solar thermal) are the primary choices for Canada doing the renewable energy program. Specially, as a 2006 report reveals, the hydraulic electro generating dams provided 59% of all electricity generated by using renewable energy in Canada. Also, as all we know, a lot of places in Canada have high wind speed.…

    • 1205 Words
    • 5 Pages
    Improved Essays
  • Superior Essays

    Renewable Energy In China

    • 1801 Words
    • 8 Pages

    Globally, China produces 24.7% of all hydroelectric power production, with the Three Gorges Dam (located in the Yangtze River) being the main contributor. The Gobi Desert is home to the most solar farms. In 2015, its capacity was increased by 18 gigawatts (equal to the United States ' total solar capacity). China is known as the world 's largest investor in renewable energy. Worldwide, according to the International Energy Agency, China consists of 40% of renewable capacity growth, while wind and solar energy sectors have continued to grow and expand.…

    • 1801 Words
    • 8 Pages
    Superior Essays
  • Improved Essays

    8.7 (a) Total power of the solar power plant (b) Total power of the wind Turbine Moreover, according to the proposed EMS algorithm, which shown in Section 7.4, battery SOC level is determining the operation of the PEM fuel cell, during peak load demand periods. Hence when the: • SOC is low (≤ 40.5%), the remaining energy is satisfied by the PEMFC stack, and the extra power will be used to charge the battery (SOC goes high). • SOC is high (≥ 80%), the remaining energy is satisfied by the battery bank only. At this time, the battery bank discharge current is very high and the battery bank terminal voltage drops significantly. • SOC is between 40.5% and 80%, the remaining energy is satisfied by either the battery bank or by the hybrid PEMFC/battery system.…

    • 704 Words
    • 3 Pages
    Improved Essays