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Contents contributed and discussions participated by Sydney Yung

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Sydney Yung

Pro of solor enerrgy - 0 views

www.solarpoweristhefuture.com/ow-a-solar-furnace-works.shtml

solar pros

shared by Sydney Yung on 12 Mar 14 - No Cached
Nick Waters liked it
  • A solar furnace is any device that creates heat by concentrating sunlight through the use of reflectors. There are many different sizes of solar furnaces that you can purchase or build yourself
  • The principle of operation consists of two mirrors pointing at a focus. The intensity of sunlight in that focus will increase approximately three times. The reason for this is because instead of only getting light from the sun, the focus gets light from the sun and two mirrors.
  • Two mirrors pointing at a focus is not going to generate enough solar energy for you to do much. Once you have 10 mirrors pointing at a focus, you will begin to get closer to levels that are capable of heating and cooking food.
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  • The great thing about solar furnaces is that they are extremely versatile and have no negative effects on the environment.
Sydney Yung

HowStuffWorks "Photovolatic Cells: Converting Photons to Electrons" - 0 views

science.howstuffworks.com/...solar-cell1.htm

shared by Sydney Yung on 12 Mar 14 - No Cached
  • photovoltaic (PV) cells, which as the name implies (photo meaning "light" and voltaic meaning "electricity"), convert sunlight directly into electricity. A module is a group of cells connected electrically and packaged into a frame (more commonly known as a solar panel), which can then be grouped into larger solar arrays
  • Photovoltaic cells are made of special materials called semiconductors such as silicon, which is currently used most commonly. Basically, when light strikes the cell, a certain portion of it is absorbed within the semiconductor material. This means that the energy of the absorbed light is transferred to the semiconductor. The energy knocks electrons loose, allowing them to flow freely.
  • PV cells also all have one or more electric field that acts to force electrons freed by light absorption to flow in a certain direction. This flow of electrons is a current, and by placing metal contacts on the top and bottom of the PV cell, we can draw that current off for external use
Sydney Yung

pro of solar energy - 1 views

energyinformative.org/solar-energy-pros-and-cons

pros energy electricity solar

shared by Sydney Yung on 12 Mar 14 - No Cached
Nick Waters liked it
  • Renewable Solar energy is a renewable energy source. This means that we cannot run out of solar energy, as opposed to non-renewable energy sources (e.g. fossil fuels, coal and nuclear).
  • We will have access to solar energy for as long as the sun is alive – another 6.5 billion years according to NASA[1]. We have worse things to worry about; in fact, scientists have estimated that the sun itself will swallow Earth 5 billion years from now.
  • Abundant The potential of solar energy is beyond imagination. The surface of the earth receives 120,000 terawatts of solar radiation (sunlight)
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  • Sustainable An abundant and renewable energy source is also sustainable.
  • Environmentally Friendly Harnessing solar energy does generally not cause pollution. However, there are emissions associated with the manufacturing, transportation and installation of solar power systems –
  • Good Availability Solar energy is available all over the world
  • Many Applications Solar energy can be used for many different purposes
  • With the introduction of shared solar, homeowners can subscribe to “community solar gardens”, and generate solar electricity without actually having solar panels on their own rooftops.
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