What are Photovoltaics?
When you begin to learn how solar energy systems work, one word that is frequently used is "photovoltaics." While the term doesn't exactly roll of the tongue, harnessing the power of the sun would be near impossible without it. So, what are photovoltaics and how exactly do they fit within a solar power system?
Understanding Photovoltaics
Many people confuse photovoltaics with being a physical thing, when in truth, it is a field of research and technology more than anything else. At its core, photovoltaics is related to the production of electricity through sunlight conversion.
How Photovoltaics Work
For a solar energy system to function, it needs something capable of capturing the energy of the sun. The components of the system which are responsible for this are called the solar cells. It takes more than one, so multiple solar cells are interconnected to form a photovoltaic module, or panel. When multiple panels are linked together to create the necessary sized system, it is called a photovoltaic array.
The array, or bank of solar panels, absorbs the sun's energy and stores it in the individual cells. Inside the cells, the solar energy is converted to direct current (DC) electricity. An inverter is then used to convert the DC voltage into alternating current (AC) electricity which is compatible with our home's wiring and appliances.
The Future of Photovoltaics?
Because solar panels on spacecrafts are used to create electricity when the ship is in the inner solar system, The European Space Agency (ESA) has recently started researching the possibilities of attaching photovoltaic panels to in-space satellites with the purpose of generating electricity in space and beaming it back to Earth in the form of lasers or microwaves.
Additionally, technology in the photovoltaic field is moving ahead with newer energy collecting devices like smaller celled panels and energy concentrators like the Fresnel lens. With advancements such as these, the cost of owning a photovoltaic system could be dramatically reduced, making them more accessible to those who want their own solar power systems.
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Introduction to Solar Photovoltaics
A short introduction to Solar Photovoltaic energy generation -
Nanotechnology and photovoltaics
There's only one source of renewable energy that can provide all of the world's needs and that's the Sun. In fact, enough sunlight falls on the Earth's surface in just a couple of hours each day to meet the whole world's energy needs for one year. The question is: how can we effectively and economically harness this solar energy, without mass-producing very expensive conventional solar cells, which would ultimately require vast tracts of land in order to do their job? Nanotechnology could provide the answer in the form of a new kind of solar cell, one which would be relatively inexpensive to manufacture and highly flexible in design. In fact, you maybe surprised as to just how flexible these cells might be! Find out more by watching this movie. This is one of a selection of intriguing movies which are available for free download from the EPSRC Nanotechnology Image Library at : www.nanoscience.dept.shef.ac.uk You may also be interested in navigating to the "Soft Machines" site belonging to Professor Richard Jones - who features in this movie - for up-to-date discourse on all things nano. Here's the link : www.softmachines.org -
SOLAR TRAINING DIY SOLAR PANEL PV PHOTOVOLTAIC HARBOR FREIGHT SOLAR ENERGY SOLAR PANEL KITS
Solar Training is an interesting idea as True Green Business may be the wave of the future. www.greenpowerscience.com Check your local harbor freight tools usa inc harbor freight usa Please rate this video. Thank you very much. www.greenpowerscience.com $250 solar panel sysytem in action. This easy system is affordable and there is no need to take out a 2nd mortgage:-) www.greenpowerscience.com FRESNEL LENS GREEN POWER SCIENCE -
Speed Learning - Photovoltaics
PhD student Nicole Kuepper, gives a quick lesson in photovoltaics. -
Third-Generation Photovoltaics
(May 28, 2008) Gavin Conibeer, senior research fellow at the University of New South Wales, discusses approaches to third generation photovoltaics. The Energy Seminar meets weekly during the academic year. For a list of upcoming talks, visit the events page at the Woods Institute for the Environment website. Stanford University www.stanford.edu Woods Institute for the Environment at Stanford: woods.stanford.edu Gavin Conibeer www.pv.unsw.edu.au Stanford University Channel on YouTube: www.youtube.com -
Solar Photovoltaics
How sunlight is transformed into electricity. -
Prototype of solar photovoltaic-thermal co generator
PV / T co-generator. Using optical devices such as mirrors, fresnel lenses, etc., it is possible to collect solar light and concentrate its energy on a single small area solar cell (photovoltaic). This reduces the total cell area an amount equal to the concentration ratio and thus decreases the cost of the PV system, as a relatively inexpensive optical concentrator replaces the expensive semiconductor material. Moreover, using light concentration boosts the cell conversion efficiency. In addition - the water as an infrared filter prevented overheating of solar cell that increase it power output significantly. More see at www.tonchev.org -
Advanced Molecular Photovoltaics
Michael McGehee, associate professor of Materials Science and Engineering at Stanford University, and Alan Sellinger, consulting professor of Materials Science and Engineering at Stanford University, discuss the Center for Advanced Molecular Photovoltaics. The Energy Seminar meets weekly during the academic year. For a list of upcoming talks, visit the events page at the Woods Institute for the Environment website. Stanford University: www.stanford.edu Woods Institute for the Environment at Stanford: woods.stanford.edu Michael McGehee www.stanford.edu Alan Sellinger stanford.edu Center for Advanced Molecular Photovoltaics camp.stanford.edu Stanford University Channel on YouTube: www.youtube.com
Introduction to Solar Photovoltaics
Nanotechnology and photovoltaics
SOLAR TRAINING DIY SOLAR PANEL PV PHOTOVOLTAIC HARBOR FREIGHT SOLAR ENERGY SOLAR PANEL KITS
Speed Learning - Photovoltaics
Third-Generation Photovoltaics
Solar Photovoltaics
Prototype of solar photovoltaic-thermal co generator
Advanced Molecular Photovoltaics