Top Banner

Click here to load reader

Solar Power Energy – It’s Everywhere. 2 Solar Energy Solar energy is sustainable light and heat energy from the Sun. Solar Cells convert solar light energy

Jan 29, 2016



  • Solar Power

    Energy Its Everywhere

  • *Solar EnergySolar energy is sustainable light and heat energy from the Sun.

    Solar Cells convert solar light energy directly to electricity.

    Solar heat energy can be collected and concentrated using mirrors or reflectors to heat water to steam. The steam is used to generate electrical energy. Solar heat energy can be used directly for hot water or space heating homes or offices.

  • Solar Power Everywhere* Solar Cars

    Solar Calculators

    Solar Lights

    Solar Homes


    Solar Toys

    Solar Hot Water

  • Solar Light Energy to Electrical Energy*

  • Solar Home Electricity. *Solar System once installed provides clean renewable energy for 20 years.

  • Solar Power *Clean emission-free electricity produced by large solar farms power companies supply electricity to homes and businesses. The President plans on installing solar panels on the White House in 2011.

  • *Concentrating Solar Heat

  • Benefits of Solar Energy*

    Solar TechnologiesSolar Jobs

    Presenters NotesThe International Year of Chemistry 2011 (IYC 2011) is a worldwide celebration of the achievements of chemistry and its contributions to the well-being of humankind. Under the unifying theme Chemistryour life, our future, ACS will be celebrating the year with a range of interactive, entertaining, and educational activities for all ages. This PowerPoint presentation is designed for use by teachers in upper elementary school classrooms or as a public outreach presentation. This presentation is a part of a set of materials from the American Chemical Society in support of the International Year of Chemistry. This set of slides is one of six topics dealing with alternative energy, they include Biomass to Energy, Nuclear Energy, Solar Energy, Water Power, Wind Energy and Battery Power. Each presentation consists of text and images designed to illustrate basic science concepts in the context of alternative energy. It may be necessary to edit and alter this presentation to make it appropriate for various groups. Each state and many school districts have their own teaching standards and these presentations may need changes for them to match local standards.

    The primary learning outcome in this set of presentations is about energy transformations. Energy can take many forms including Potential Energy, Kinetic Energy, Light Energy, Heat Energy, Sound Energy, Electrical Energy, Chemical Energy and Magnetic Energy. Managing energy transformations to change energy from a less useful to a more useful form is a major endeavor for all living things, including mankind. On Earth, the Sun is the ultimate source of (nearly) all energy on earth.


    In this presentation we focus on Solar Energy. Almost all of the energy we use on Earth comes from the Sun. The Sun gives us energy as light, and gives us heat that keeps the surface of the Earth warm. Energy from the Sun, or solar energy, can be used in several ways.One way is to use the solar light and convert it directly to electrical energy.Another way is to capture solar heat and either use the heat directly or convert it to electrical energy.

    Either way, there are many things we can power with solar energy.

    *Of all the alternative energy sources, solar power is one of the most visible types. Students do not have to look far to find an example of solar power at work. Many consumer products are powered by photovoltaic cells (solar cells). These products are all around us, from solar calculators to solar lights in our yards. It is not unusual to see houses in our own neighborhoods with solar cells on the roof to make electricity, or solar hot water panels to help with household energy. On a simpler level greenhouses make use of solar energy to grow plants when it is far too cold to grow outside. *Another way to use solar energy is with a solar cell. A solar cell absorbs energy from the Sun and changes it directly to electricity.

    In a solar cell, the light energy from the Sun shining on a solar panel produces electric current, which is the flow of electrons in a material.

    A solar panel is made from the element silicon that has been specially treated. The specially treated silicon absorbs photons, or quanta of light, which makes the electrons flow.

    Solar cells are used to power everything from calculators to street lights.

    Ask students is they own any products that are powered by solar cells. Some may even have solar panels on the roofs of their homes. Point out any local solar panels on schools or city hall, if they exist. For more information on How Solar Cells Work go to

    *One common application of solar power is the home solar cell electric system. Photovoltaic cells are mounted on the roof and generate electricity directly from the light energy from the Sun. This electricity is usually fed into the electric grid that serves all houses. The difference is that while most homes draw electricity from the grid, solar homes feed electricity to the grid. Each house has a power meter that measures the amount of electricity we use (and buy) each month. When solar houses are generating a lot of power, this meter can actually run backwards! Most homeowners only generate a portion of their annual electricity consumption. *This Solar Farm in Ohio has 159,000 solar panels on 80 acres provide electricity for more than 9,000 homes. Large installations are becoming more common. The government supports alternative energy by providing leadership and tax incentives. Many commercial and residential installations get money back from the government for their efforts to create solar energy supplies. The White House had solar panels back in the 1070s but they were later removed. There are current plans to put new solar panels on the White house in 2011.

    *Another way to use solar heat energy is a process called Solar Thermal Energy Conversion, or STEC. This process can produce enough electricity for an entire city. Here's how it works. Huge mirrors are all turned so that they reflect the Sun's light onto a central receiver. The picture the left side of this slide shows some of these enormous mirrors surrounding the central receiving tower. An automatic control system keeps turning the mirrors so that during the day they track the path of the Sun across the sky. This allows the maximum amount of sunlight to be reflected from the mirrors. This energy heats collectors on the tower to extremely high temperatures, heating water to steam, which is then used to generate electricity.

    The picture on the right shows a different way to collect heat from sunlight. A curved mirror focuses the sunlight on a tube that runs down the middle of each mirror. Tubes from many mirrors are connected together and the heat from the mirrors supplies enough energy to turn large amounts of water into superheated steam. The steam is piped to ground level and used to turn turbines, which drive the big generators that produce electricity.*Solar energy is good for the environment, but can also be good for our economy. It can provide jobs and technology that support economic development as well as environmental benefit. Examples of Solar Jobs Solar Photovoltaic (PV) Home and Business installation Solar heating and cooling (SHC) Technology Solar Power - Large Solar Farm installation for Power CompaniesBenefits of Solar Technology Diversify the energy supply Reduce dependence on imported fuels Improve air quality Offset greenhouse gas emissions

    Slide 3: 4:

    Slide 5: Slide 6: 7: 8: *