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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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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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July 08, 2009
By: Admin
Category: Solar Accessories
Flat Collector
Flat collectors, and even concentrator is a tool used to collect solar radiation energy so that thermal energy produced can be used in more practical for a variety of processes. Flat solar collector consists of a transparent cover, absorber and insulator. Solar radiation that falls on the surface of the transparent material in the short wave will be forwarded by transparent material and then absorbed by absorber. Black color have an ability to absorb a larger radiation so that most of the sun radiation will be absorbed. Absorption of this radiation will create a high temperature absorber. Heat radiation emanated by absorber but in the form of long waves. Most of the transparent material has an opaque nature of long wave radiation and therefore part of the long wave radiation reflected back by this transparent material to the absorber. Some radiation is absorbed will be reflected back and the rest will experience the same process that is part reflected back to the absorber. Thus, the loss of heat due to radiation can be minimized by flat collector. In addition, the transparent cover also functions as a heat loss barrier carried by the air above the absorber to the environment.
Heat from the absorber is used through heat exchanger to the media of heat carrier. Media of heat carrier commonly used can be air or water. When using water as the media, absorber will conduct heat to the surface of the outside pipes. Then take heat conduction from the outside surface to the inside surface. With the process of convection, heat will move from the inside surface to the water that flows in the pipes, so the water temperature will increase. Water with a high temperature and then used in the other parts of the outside collectors flat. A similar process occurs when air is used as a medium of heat, but in this case the pipe is rarely used. The air above (or below) the absorber heated through convection due to direct contact with the absorber. High temperature air is then flowed out of collectors than used in processes that require hot air.
The performance of a solar collector will depend on the absorptivity characteristics of the absorber, transmissivity of transparent material, overall heat transfer coefficient of the insulator, the transparent material and the absorber.
Absorptivity is the portion of light that is absorbed by an object; transmissivity is the portion of light that is forwarded by an object, while the overall heat transfer coefficient is a power of heat transfer or the opposite of heat resistant.
Check out my other guide on solar house
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May 30, 2009
By: Admin
Category: Solar Accessories
Solar Collector The Heart Of A Solar Heating System
Executive Summary about Solar Collector by Armand Hadife
Solar energy is accessible in plentiful places around the world. This high temperature produced can be exploited for heating air or water in houses and buildings
Using solar energy is a natural and affordable approach for spaces or water heating. When using solar power for heating purposes you employ a device that will allow capturing the heat of the sun. This device is called a solar collector. A basic solar collector can be made with no difficulties.
The next step is to find a system to help circulate water or air inside the solar collector. In general, devices like fans and pumps are used to push air or water thru the solar collector and from the storage tank to the house.
For the novice, making a solar collector can be a difficult and demanding project. This is why solar collectors are broadly offered online and in solar products shops.
How to Build a Solar Collector
Executive Summary about Solar Collector by Mick Jeys
Building a solar collector is the best way to save money on electricity bills, and can be used to generate electricity or to heat water. The two most popular uses for solar collectors are to heat water and generate electricity.
Solar Collector To Generate Electricity
Typically known as a solar cell or panel, they are typically made from titanium dioxide, and create electricity through the photovoltaic effect. It is now very simple to build your own generator at home quite cheaply by substituting titanium dioxide with cuprous oxide.
Solar Collector To Heat Water
The most common example of this type can be seen in common solar hot water systems, where the hot water tank is actually up on the roof with the solar collector. Trials are being held in Germany to use solar heated water from the summertime to heat homes in the winter.
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May 25, 2009
By: Admin
Category: Solar Heater
Solar Heaters for Swimming Pool – Enjoy Swimming in October
Executive Summary about Solar Heaters by Tanya Turner
Are you thinking about buying a swimming pool heater? A very cost effective option would be getting a solar heater for swimming pool.
Solar heater for swimming pools – how does it work?
Unlike other types of solar powered devices, solar pool heater works rather simple. Solar panels collect heat from the sun. A pump forces water from your swimming pool through a filter that leads it into a solar collector. The size of a swimming pool heater you need depends on the size of your pool and the climate in your area. For bigger pools and colder places you need bigger solar heaters. Heaters with 2′x20′ panels are the most popular. For bigger pools you will need more panels.
Installing your solar pool heater
Unlike solar water heaters, pool heaters are fairly easy to install.
Maintaining your solar heater for swimming pool
Getting a solar heater for your pool makes much more sense than getting any other type of pool heater including gas and electric heaters.
Pool Solar Heaters – How to Build Your Own Pool Solar Heater
Executive Summary about Solar Heaters by Benjamin Robert Ehinger
Here is a plan to put together your solar heater.
First, you are going to need about 150 feet of long black tubing that is about a half inch around to three fourths of an inch around. You will also need about 10 feet of PVC pipe that will fit snugly into the ends of the black tubing. you will need a shut off valve that will be attached to one end of the PVC piping. You will also need a pump that will be strong enough to move water through the tubing at a slow speed.
Second, you are going to need some 2 by 4 pieces of lumber and some metal brackets. You will want to mount this part of your heater on a rooftop that is in direct sunlight, a shed, a barn, a garage, or anywhere else that is in direct sunlight.
Last, you will run the PVC piping from each end of the black tubing into the pool. When you turn the pump on it will suck water out of your pool at a slow speed and pump it up and through your black tubing, very slowly. You want this water to be sitting in the black tubing and getting hot. Then, when it comes back into the pool it will start to raise the temperature of your pool. This is now your solar pool heater.
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May 18, 2009
By: Admin
Category: Solar Heater
The Benefits Of A Solar Heater: Harnessing The Sun
Executive Summary about Solar Heater by Michelle Bery
A solar heater literally harnesses the energy of the sun. The sun’s core holds enormous energy in the form of radiation; the energy that reaches the earth is considered solar energy.
In the case of a solar heater, we literally “collect” the solar energy that makes its way to earth. Flat plate collectors are thin panels that trap, store, and convert solar energy. When the sun hits the flat plate collector the solar energy is contained inside and used to heat coils within the collector. Those larger structures that are using solar energy find this type of solar heater far more effective for their purposes.
Solar Water Heaters
Executive Summary about Solar Heater by Shweta Rai
Solar water heaters are extremely useful household appliance. These heaters provide ample warm water. Unlike other water heaters, these do not harm the environment. Researches too have proved that these water heaters are quite beneficial. Due to these advantages, solar water heaters are recommended every where.
How solar water heater works?:
These heaters come with storage tank and solar collector. The water is passed through the storage tank and it is heated due to sunlight. There are two pipes, which connect the solar water tank to water heater inside the house. Outlet pipe carries warm water from solar heater to standard heater. The second pipe carries the water in opposite direction. The water heater is painted black, to absorb a lot of light.
How to install these heaters?:
Consult the buyer before buying these water heaters. Make sure that these heaters are placed facing the sun.
What can be approximate cost of these heaters?
Solar water heater cost vary to a large extent.
What are major benefits of these water heaters?
These Water heaters have a number of advantages. They are environment friendly and do not cause any pollution. Secondly, they reduce your electricity expenditure to a large extent
Check out my other guide on Garden Lights
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