Photovoltaic Solar Panels-How Do They Work?
Solar powered electricity generation is one of the best things that have happened to the environment. This is an alternative form of energy production that does not emit any hazardous material into the environment and uses something that is naturally available as its source.
Photovoltaic energy is the conversion of sunlight to electricity through a photovoltaic cell (PV), a non-mechanical device usually made from silicon alloys. As sunlight strikes a PV cell, it creates an electron imbalance between the front and back surfaces of the cell.
This (PV) solar cells are thin silicon disks that convert sunlight into electricity. These disks act as energy sources for a wide variety of uses, including: calculators and other small devices telecommunications, rooftop panels on individual houses; and for lighting, pumping, and medical refrigeration for villages in developing countries. Photovoltaic modules are usually rigid, rectangular devices ranging in size from 2’ by 4’ to as large as 4’ by 8’. Some PV module technologies are flexible and as large as 2’ by about 20’ or even larger.
Generally photovoltaic cells do not require major maintenance. Panels have no moving parts and so there is little chance of the solar panels malfunctioning or becoming broken. Generating your own power allows you to save money and be environmentally conscious. Generating solar energy also reduces the amount of greenhouse gases in the atmosphere. Carbon dioxide is the leading cause of global warming and massive amounts of it are released into the air every time from power plants that generate and distribute conventional electricity.
Want to know how you can build your own Home Solar Panels to reduce your electricity bill. Solar Power How It Works Article Source:http://www.articlesbase.com/diy-articles/photovoltaic-solar-panelshow-do-they-work-807699.html
Which Wood When? A Simple Guide To Choosing Hardwoods And Softwoods?
Let’s take the popular wood used to construct model boats and airplanes, remember what it was called, yes, Balsa wood, one of the softest and lightest timbers available. Balsa is a hardwood. The Yew tree produces an incredibly tough wood, in fact yew is probably as hard as one of the hardest hardwoods, but actually Yew is a softwood. You are probably wondering how or where did these terms confusing terms originate? Well usually hardwoods come from broad-leafed trees and softwoods are associated with fir trees.
Popular hardwoods used in DIY and construction projects include mahogany, birch, ash, oak, and teak. Oak is synonymous with furniture manufacturing and is a popular choice material amongst professional carpenters & joiners for floors, doors and timber frame construction. Oak is incredibly tough wood and for that reason would not popular choice for novice DIY enthusiasts. Ash on the other hand is hard, strong and elastic, which is why it is extensively used for handles, sports equipment. Ash veneers (thin sheets of wood bonded together for strength) are widely used in the manufacture of office furniture. Birch veneers would be popular in the manufacture of residential furniture, musical instruments. Teak is hard and durable and closely associated with furniture, doors and window frames. As our knowledge and awareness of the importance of sustaining our natural resources, iroko being a more sustainable resource has largely replaced teak. Mahogany the quintessential timber choice with its red brown hues used so extensively in period furniture including dining suites, cabinets and ….
Of the soft woods, pine because of its durable nature, fast growing and relatively inexpensive is without doubt ubiquitous in use. It is commonly used and closely associated with diverse product categories including furniture, window frames, panelling, flooring etc. Spruce is to be found in garden furniture, decking, and musical instruments. Larch because of its hardwearing and water resistant qualities is another popular softwood choice used in the making of fence posts, boat building, and structural cladding.
Finally remember wood is available in a range of sizes and formats (boards, planks, sheets etc) to suit particular applications. So understanding the qualities of the various woods available will hopefully assist you through the woods and trees to making the right choice.
The Author is a professional garden designer and owner/manager of award winning Dublin based landscaping company: ‘Owen Chubb Garden Landscapes Limited’. The company has extensive experience of designing and constructing stunning gardens in a range of sizes and styles. Featuring natural paving (sandstone, limestone and granite) and mature planting, it’s attention to detail that has built the company’s reputation and the practical know-how that has created many stunning compositions. website: www.owenchubblandscapers.com Article Source:http://www.articlesbase.com/diy-articles/which-wood-when-a-simple-guide-to-choosing-hardwoods-and-softwoods–807610.html
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