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June 21, 2011
By: Admin
Category: Solar Power
Solar Energy Applications
Solar energy technologies use energy from the sun to produce heat, light, hot water, electricity, and even cooling, for homes, commercial and industrial.
There are a variety of technological applications that have been developed to take advantage of solar energy. Technology can be read further below.
Photovoltaics System
Solar cells work by converting sunlight directly into electricity. The electrons in the semiconductor material, the material used to capture sunlight, will move when the sun’s energy in the form of photons hit it. Solar energy is forcing the electrons to move, occur continuously, and consequently there is also a continuous electricity production. Process, which turns sunlight (photons) into electricity (voltage), called the photovoltaic effect.
Solar Cell Module
Solar cells are usually organized into modules that each module can consist of 40 solar cells. Some modules can be arranged to form a PV line fitted with a fixed angle facing south. Or even could be placed in a sun-tracking device, to get more solar energy throughout the day. Several rows of PV could produce enough power for a house. As for industrial applications or power companies, hundreds of lines of PV can be linked to form one large PV systems and sufficient to meet the electricity needs.
Thin Film Solar Cell
Thin film solar cells use several layers of semiconductor material with a thickness in the micrometer scale. Technology allows to create solar cells integrated into rooftops to the skylights. Even solar cells are designed for applications having the same power with actual roof.
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December 01, 2009
By: Admin
Category: Solar Light
Outdoor Solar Lights Explained
Outdoor solar lights uses the identical action to generate power as the solar panels on your ceiling (or that you could set up on your ceiling, if you selected to). Essentially, it applies photovoltaic (PV) cells, which accumulate and switch solar energy into electrical energy. The PV cells apply semiconducting materials to engage the sun’s light, which interacts with the silicon and another components to produce electrical energy. The electrical energy runs over cables which power the battery, which in go powers the light. This is an highly simple explanation, but it will present you the common idea of how solar cells play. They can only make electrical energy from direct sunshine, which is why solar lighting wants a battery in order to be able to light up the dark.
So that the batteries to keep a constant charge, the solar light fixture should be in a position that meets full sunshine for almost of the daylight. If it just gets partial sunlight, because it’s barred by trees or other construction, or because your area has much of cloudy conditions, the batteries will run out earlier, and your fixture will supply light for a lower amount of time. Most outdoor solar lights fixtures own a backup power system which applies rechargeable batteries. Solar lights fixtures which apply a small amount of electrical energy frequently apply small AA Ni-Cad or NiMh batteries. But more strong solar lights fixtures (like head lights) apply a covered lead acid battery.
Photo detectors that automatically evaluate light degrees (like the kind that tells your photographic camera when to apply its flash) are constructed into the solar lights fixtures. They monitor light degrees and turn the fixture off at morning and on at nightfall. But get sure there are no artificial light sources (like a street lights or head light) that may contribute a wrong reading and forbid the light from turning on.
Outdoor solar lights usually utilizes LED bulbs. They apply less power than incandescent bulbs and, with a lifetime of around 20 years, are much longer-lasting. Until lately, solar lights overall has not been as bright as lighting powered straight by direct current electrical energy. But the earliest super bright LEDs can at present illuminate as well as halogen bulbs.
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November 26, 2009
By: Admin
Category: Solar Light
Solar Light Tubes
Initial concept of light tubes developed by the ancient Egyptians, namely by direct use of natural light tubes with reflective material. This is the concept of the oldest and most widespread type of natural lighting of interior space.
Light tubes are also known as “tubular skylight”, “SunScope” or “Tubular Daylighting Device” allow natural light into the darkened interior room of buildings and houses. The people enjoy the natural lighting provided by skylights. However, skylights are often not evenly distribute the light, is the loss of a significant source of energy, and UV light can cause damage to the carpet and furniture. Light tubes, on the other hand, using the sun for lighting interiors without the shortcomings associated with conventional skylights. To prevent the danger of ultraviolet radiation (UV) from the carpet and furniture fading, UV inhibitors formed a dome roof on most models. Another bonus when choosing light tubes is that they provide far more heat slightly, as did the standard skylights. Because of the lack of acceptance of this heat, tubular skylights to save money on air conditioning bills during hot months.
Taking advantage of free sunlight as much as possible, the pipe hole collect sunlight from the roof dome light collector consists of an acrylic lens, bounce it to the bottom of a tube with a highly reflective interior coating, to pull the lens cap is similar to conventional recessed lighting equipment and diffuse sun light evenly throughout the interior rooms. The tube can be bent and adapted to drive around the garret or ceiling obstructions with small loss of light transmitting and can often be installed in less than three hours. Not like the ceiling of need roof to the ceiling of the timber-framed shaft and covered with drywall or wood panels, and the need for structural modifications, so installation is simple and relatively inexpensive.
Roof mounted dome made of high quality acrylic resin specially formulated to enhance the impact strength, chemical, weather resistance and high clarity.
Light tubes can be installed on almost all types of roof materials, including wood and asphalt shingles, concrete and ceramics, and metals. Thanks to a highly reflective coating on the rod, the tube can work efficiently from sunrise to sunset.
Most of the producers of glass tubular solar roof offers a 10-year warranty against defects in materials and post-installation cracks or discoloration. Tubes solar installation contractors generally offer a 2-3 year warranty for the installation of weatherproofing and storm protection.
The average size of the tubular skylight ranges between 10 and 21 inches (254 and 533 mm), diameter, which effectively light of 100-600 square feet (30,48-182,88 meters), interior space. The main factor in choosing a general measure of the distance between the roof rafters and / or ceiling beams.
Prices range from around $ 171.00 to $ 423.00. Installing a solar tube usually cost between $ 500 and $ 800. Both depend on the size of tubes and features installed.
Light tube options include:
- Dimmers which allows the natural lighting level of a room that will turn up or down according to demand.
- Light kit for night time lighting.
- Ventilation fan kit
Energy-efficient light tubes is an important part of the house and environmentally friendly buildings. Natural light effects on your physical, emotional and psychological well known as the rooms benefit from natural sunlight free will positively impact our environment for future generations. They are environmentally-friendly way to naturally brighten every room, a smart alternative to skylights and artificial lighting.
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September 26, 2009
By: Admin
Category: Solar Cooking
Solar Cooking Is Easy and Cheap Too
Did you know you can cook entire meals without any electricity or gas? It’s true. If you have access to the sun then you can cook with it.
Cooking with the power of the sun is commonly referred to as solar cooking, and you don’t need expensive gadgets or equipment to do this successfully either. Solar cooking requires sunlight of course, a bit of time, a few everyday items, and a willingness to experiment.
In the most basic form, solar cooking can be done easily as long as you have decently strong sunlight for a few hours. The stronger your sunlight is of course, the easier your solar cooking will be. In the desert southwestern areas of the United States for example, you can literally just lay food out in direct sunlight in the summer and it will cook quickly for you. We’re going to look at a little more than the basics here though.
There are two primary ways to cook food with solar power. One is to use what’s known as a parabolic cooker, and the other is to simply use reflecters.
A parabolic cooker is actually just anything you have on hand which has a slighly bowled, or parabolic shape to it. Round satellite dishes are excellent examples of this type of inward curved surface. The slight curve of a surface like this will allow you to concentrate the natural heat of the sun onto the food you’re cooking.
Parabolic cookers can be made with simple cardboard, or any slightly concaved material such as an old (small) sattelite dish, a small wok, or even a bent and curved trash can or barbecue lid. Using old materials for this is great because it allows you to recycle and it doesn’t usually cost a thing.
Most people choose to make their first solar oven with cardboard because it’s readily available, easy to work with, and free.
The best parabolic solar cooker will have slanted sides though, not upright ones. A slant of about 60 degrees outwards is ideal. Once you find the object you plan to use for your solar cooking, then you simply cover it with tin foil, mylar, or mirrors. Mirrors can actually be dangerous because too much heat is generated, so it’s best to start with aluminum foil. Cover your concaved object with the foil so that the shiny side is facing out. This will capture more of the sunlight shining down on your solar cooking, and help focus it onto your food.
Simple reflector style solar cookers are another popular option, and in many cases you don’t even have to put things together to make this work. With this style of solar cooking, you simply put a pot or pan out into direct sunlight and surround it on three sides with reflective material to help direct the solar heat to your food.
With either solar cooking design though, you’ll want to use either glass or dark metal cooking pots and pans. Dark metal helps attract and absorb the natural solar heat from the sun, and glass allow that solar heat to pass through easily yet stay trapped inside for cooking.
Depending upon the strength of the sunlight you have available and the solar cooker design you’re using, it can take anywhere from one to three hours to fully cook common meals for three to five people.
Of course you can also use regular solar panels or a solar power generator kit to power a more conventional energy efficient stove or oven when the sun isn’t strong enough to use your solar cooker, or if you prefer to cook foods in a more traditional manner.
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June 01, 2009
By: Admin
Category: Solar Cooking
Solar Cookers – Going Green With Simple Solar Ovens
Executive Summary about Solar Cooker by Detlef Warner
Cooking with a solar cooker is one more way that you too can go green!
A solar cooker, or solar oven, is mechanism that uses sunlight to cook food rather than electricity or gas. Solar cookers come in several different varieties: A box cooker, panel cooker, and a parabolic cooker. While a box cooker is a better choice when you’re looking to cook a large amount of food, a parabolic cooker is capable of cooking the food faster.
Solar cookers will take more time than a traditional oven, with the exception of a parabolic cooker, so you should plan on allowing approximately two times the regular cooking time. Solar cookers are readily available both online and in stores. You can construct a solar oven out of something as simple as cardboard and in a short amount of time be cooking your first solar meal!
How to Make a Solar Cooker? – Making a Homemade DIY Solar Cooker
Executive Summary about Solar Cooker by Dinna Bonevi
Isn’t it a wonderful idea to make a homemade DIY solar cooker, then cooking under the sun? Clues are: it’s energy source is free, environment friendly, comparable to latest cooker but with great discount, pocket friendly and absolutely can’t operate without the help from the mother sun. I’m talking of having a solar cooker, cooking under the sun project.
Will you spend some bucks or rather choose the pocket friendly unit? I guess all of us prefer money saving units. Absolutely it could, the sun continuously gives us the heat and solar energy more than we ever need. So, the solar cooker, cooking under the sun project is definitely durable when we speak of operational source of energy.
Let’s try to make use of readily available sources within the vicinity for our solar cooker.
Things needed:
- Foils or mirrors as reflectors
- Conductive Materials
- Stand (for the food)
The construction of a solar cooker is very easy. A solar cooker is usually a box style that’s made with conductive supplies. The longer it is exposed to the sun the hotter the unit gets. The reflectors help centralize the solar heat on the food that will be cooked.
The solar cooker could reach as high as 300 degrees temperature. Knowing on how to make a homemade DIY solar cooker project is another fun project for everyone. Enjoy the heat and let’s eat!
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