What is Renewable Energy?

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What is Renewable Energy?

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Title: What is Renewable Energy?


1
What is Renewable Energy?
  • energy is produced from
  • regenerative, resources such as
  • solar radiation, wind, water and
  • heat from the earth's interior.

2
  • Renewables have long been used for a wide variety
    of applications ranging from
  • solar energy for cooking meals,
  • to hydroelectric plants for generating energy

3
Why Use Renewable Energy?
  • in developing countries where environmental,
    ideological and economic reasons prevail
  • alternative to conventional energy sources that
    are
  • unavailable,
  • unevenly distributed,
  • and extremely costly.

4
Solar Heating
  • Solar rays provide energy that is used to heat
    water or air.
  • for heating water for domestic use.
  • include cooking and crop drying.

5
  • Environmental concerns heating plant in Denmark
    to add a 32,293 ft2 solar energy plant to
    supplement the town's existing coal fired plant.
  • solar plant would eliminate the effect on the
    environment of burning 200 tons of coal a year,

6
  • plant produces 1,270 kWh annually and saves
    100,800 per year.
  • eliminates production of 7.6 tons of sulfur
    dioxide, 2.6 tons of nitrous oxide and 1,300 tons
    of CO2

7
  • Bornholm Folk High School in Denmark saves 29,000
    liters of oil and 13,920 due to its solar
    heating system.
  • permitting the saving of 30 of the school's
    annual oil consumption
  • reducing atmospheric emissions annually by 174
    lbs. each of sulfur dioxide and nitrous oxide as
    well as 70.5 tons of carbon dioxide

8
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9
Photovoltaic
  • convert solar radiation into electricity.
  • provide energy for innumerable applications
  • water pumping to hydrogen production

10
  • A PV-Wind-Diesel hybrid system forms a
    centralized power system located in the center of
    the town of Santa Maria Magdalena, Hidalgo,
    Mexico.
  • Village-wide, utility grade power is provided for
    43 homes, three schools, two stores, a church and
    an auditorium.

11
  • More homes and a clinic will be added to the
    system in the future.
  • The system is designed to support 45 kWh/day
    loads with substantial expansion capability.

12
  • Sadat City, Egypt is the site of a 10 KVA
    air-conditioning system and a 3.5 KVA water
    pumping system installed in 1981.
  • The water pumping system for crop irrigation
    produces 15.89 kWh/day while the air-conditioning
    unit for an administration building produces 45.4
    kWh/day.

13
  • gas generator backs up the AC
  • AC system consists of 320 modules, with two days
    of battery
  • water pumping system is 96 modules, with one day
    of battery.

14
  • Hydroelectric energy
  • the power of which is produced by falling water.
  • impounds water behind dams and then diverts it
    through a channel to a water turbine that
    generates the electricity.
  • projects range in size from those on major rivers
    and dams, to those on smaller rivers and
    reservoirs.

15
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16
  • The Shin-Aimoto Hydroelectric Power Plant,
    capable of producing 124 MW
  • started operations in 1985 in Japan

17
Hydroelectric
  • Hydropower is an excellent power source as it can
    be collected at any time of the day, has a long
    lifetime (50 to 100 years),
  • and is environmentally benign.

18
  • Geothermal
  • comes from the heat held in underground rocks and
    fluids intense pressure and radioactivity
  • generates heat and it occasionally escapes
    through hot springs and geysers.
  • ten percent of the world's land mass contains
    geothermal resources

19
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20
  • Cerro Prieto geothermal field in Northern Mexico.
  • producing a total of 180 MW of electrical power.

21
  • greenhouse in Japan is heated by a geothermal
    facility.
  • is also widely used for power generation, air
    conditioning, hot water supply and fish
    cultivation.

22
  • Biomass energy is energy produced from organic
    materials.
  • Includes wood, biogas, crop residuals, solid
    waste, animal wastes, sewage, and waste from food
    processing.
  • Energy derived from biomass includes gas,
    electricity, liquid fuels, dry heat and steam.
  • Wood fuel, energy from waste and alcohol fuels
    are the three main forms of bioenergy.

23
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24
  • It can sometimes be easy to overlook valuable
    resources due to preconceptions.
  • sugar mill in India underwent a change of
    perceptions when it stopped treating bagasse as a
    waste product and began utilizing it as an energy
    source for milling operations.
  • Surplus bagasse can be used to produce
    electricity for sale to nearby industries or the
    utility grid

25
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26
  • Wind energy
  • convert the kinetic energy of the wind into a
    useful form of energy.
  • composed of a rotor, tower, drive train,
    generator, and control systems.
  • designed to operate in remote locations and are
    often tied in to other power generation systems.

27
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28
  • A wind/diesel hybrid system installed in Norway.
  • Remote power systems utilizing U.S. small wind
    turbines have been installed in more than 70
    countries around the world.

29
Passive Heating
  • This "tropical pyramid" is part of a sport
    center, hotel complex and conference center in
    Vosendorf, 12 miles south of Vienna, Austria.
  • The concept was to create a tropical landscape in
    the open air to look as natural as possible.

30
  • The transparent sides make excellent use of day
    lighting and help with solar heat gains.
  • An efficient energy. management system keeps the
    energy consumption relatively low.

31
  • Passive solar building design taps the heating
    energy of sunshine directly.
  • Passive solar makes use of architectural features
    for heating, cooling and lighting.
  • Proper design can reduce the demand for
    electricity used for lighting and air
    conditioning in residential, commercial and
    office buildings.

32
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33
  • Los Molinos School in Andalucia, Spain, uses
    passive principles for minimal energy use, low
    maintenance, durable, adequate lighting and
    acoustic control.
  • The design takes into account the educational use
    of the building -- no night-time occupancy and
    reduced summer use.

34
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35
  • Solar radiation through the fixed blind system
    provides heat for the school, with
    cross-ventilation reducing overheating.
  • Day lighting is used extensively throughout the
    school.