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Sun Power

July 13, 2011 By: Admin Category: Solar Power

Using the Sun for Power – How It Works

Executive Summary about Sun Power by Richard Chapo

Generating electricity from the sun is all about converting sunlight into power. The technology behind solar systems is known as photovoltaic technology. Essentially, this technology involves using sunlight to create a chemical reaction. This process creates a direct current of electricity. The electricity is then converted to usable alternating current electricity and stored in a battery or fed into a utility grid system.

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Solar Cost

July 12, 2011 By: Admin Category: General

Solar Power For Home – How Much Does Home Solar Cost?

Executive Summary about Solar Cost by Anthony Dempster

Solar power for homes is becoming an increasingly popular method of powering some or all of your house. However many people ask the question “How much does home solar cost?”

There are two main methods of getting your house up and running on solar power electricity. Simply put, they are either professional installation or “do it yourself” (DIY) solar panel installation.

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Solar Applications

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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Solar Efficiency

June 20, 2011 By: Admin Category: Solar Heater

A Key Element In Solar Water Heater – Efficiency

solar high efficiency Solar Efficiency

Solar energy most often associated with electricity production, while at the other side, the heating is also one form of solar energy use. Heating is not too difficult, in this case the efficiency is the key to maintaining your system from damage.

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Solar Wind Generator

October 11, 2010 By: Admin Category: Solar Power, Wind Power

Greenerator by Jonathan Globerson

If you live in apartments in high-rise buildings, and want to use renewable energy, such as wind turbine and solar cell, then Greenerator concept design is one of the solutions. The Greenerator by Jonathan Globerson can be installed on balconies and equipped with flexible solar panels and a vertical axis wind turbine. The energy generated by the system can be used to power computers or other equipment in the home. The designer believes that each unit can reduce your electric bill by 6 percent.

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Photovoltaic Cells

December 21, 2009 By: Admin Category: Solar Cells

Glitter-sized Solar Photovoltaics Produce Competitive Results

Adventures in microsolar supported by microelectronics and MEMS techniques

photovoltaic cells micro Photovoltaic Cells

Representative thin crystalline-silicon photovoltaic cells – these are from 14 to 20 micrometers thick and 0.25 to 1 millimeter across.

Sandia National Laboratories scientists have developed tiny glitter-sized photovoltaic cells that could revolutionize the way solar energy is collected and used.

The tiny cells could turn a person into a walking solar battery charger if they were fastened to flexible substrates molded around unusual shapes, such as clothing.

The solar particles, fabricated of crystalline silicon, hold the potential for a variety of new applications. They are expected eventually to be less expensive and have greater efficiencies than current photovoltaic collectors that are pieced together with 6-inch- square solar wafers.

The cells are fabricated using microelectronic and microelectromechanical systems (MEMS) techniques common to today’s electronic foundries.

Sandia lead investigator Greg Nielson said the research team has identified more than 20 benefits of scale for its microphotovoltaic cells. These include new applications, improved performance, potential for reduced costs and higher efficiencies.

“Eventually units could be mass-produced and wrapped around unusual shapes for building-integrated solar, tents and maybe even clothing,” he said. This would make it possible for hunters, hikers or military personnel in the field to recharge batteries for phones, cameras and other electronic devices as they walk or rest.

cells photovoltaic nielson Photovoltaic Cells

Sandia project lead Greg Nielson holds a solar cell test prototype with a microscale lens array fastened above it. Together, the cell and lens help create a concentrated photovoltaic unit.

Even better, such microengineered panels could have circuits imprinted that would help perform other functions customarily left to large-scale construction with its attendant need for field construction design and permits.

Said Sandia field engineer Vipin Gupta, “Photovoltaic modules made from these microsized cells for the rooftops of homes and warehouses could have intelligent controls, inverters and even storage built in at the chip level. Such an integrated module could greatly simplify the cumbersome design, bid, permit and grid integration process that our solar technical assistance teams see in the field all the time.”

For large-scale power generation, said Sandia researcher Murat Okandan, “One of the biggest scale benefits is a significant reduction in manufacturing and installation costs compared with current PV techniques.”

Part of the potential cost reduction comes about because microcells require relatively little material to form well-controlled and highly efficient devices.

From 14 to 20 micrometers thick (a human hair is approximately 70 micrometers thick), they are 10 times thinner than conventional 6-inch-by-6-inch brick-sized cells, yet perform at about the same efficiency.

100 times less silicon generates same amount of electricity

“So they use 100 times less silicon to generate the same amount of electricity,” said Okandan. “Since they are much smaller and have fewer mechanical deformations for a given environment than the conventional cells, they may also be more reliable over the long term.”

Another manufacturing convenience is that the cells, because they are only hundreds of micrometers in diameter, can be fabricated from commercial wafers of any size, including today’s 300-millimeter (12-inch) diameter wafers and future 450-millimeter (18-inch) wafers. Further, if one cell proves defective in manufacture, the rest still can be harvested, while if a brick-sized unit goes bad, the entire wafer may be unusable. Also, brick-sized units fabricated larger than the conventional 6-inch-by-6-inch cross section to take advantage of larger wafer size would require thicker power lines to harvest the increased power, creating more cost and possibly shading the wafer. That problem does not exist with the small-cell approach and its individualized wiring.

photovoltaic cell group1 Photovoltaic Cells

From left to right, Sandia researchers Murat OKandan, Greg Nielson, and Jose Luis Cruz-Campa, hold samples containing arrays of microsolar cells.

Other unique features are available because the cells are so small. “The shade tolerance of our units to overhead obstructions is better than conventional PV panels,” said Nielson, “because portions of our units not in shade will keep sending out electricity where a partially shaded conventional panel may turn off entirely.”

Because flexible substrates can be easily fabricated, high-efficiency PV for ubiquitous solar power becomes more feasible, said Okandan.

A commercial move to microscale PV cells would be a dramatic change from conventional silicon PV modules composed of arrays of 6-inch-by-6-inch wafers. However, by bringing in techniques normally used in MEMS, electronics and the light-emitting diode (LED) industries (for additional work involving gallium arsenide instead of silicon), the change to small cells should be relatively straightforward, Gupta said.

Each cell is formed on silicon wafers, etched and then released inexpensively in hexagonal shapes, with electrical contacts prefabricated on each piece, by borrowing techniques from integrated circuits and MEMS.

Offering a run for their money to conventional large wafers of crystalline silicon, electricity presently can be harvested from the Sandia-created cells with 14.9 percent efficiency. Off-the-shelf commercial modules range from 13 to 20 percent efficient.

A widely used commercial tool called a pick-and-place machine — the current standard for the mass assembly of electronics — can place up to 130,000 pieces of glitter per hour at electrical contact points preestablished on the substrate; the placement takes place at cooler temperatures. The cost is approximately one-tenth of a cent per piece with the number of cells per module determined by the level of optical concentration and the size of the die, likely to be in the 10,000 to 50,000 cell per square meter range. An alternate technology, still at the lab-bench stage, involves self-assembly of the parts at even lower costs.

Solar concentrators — low-cost, prefabricated, optically efficient microlens arrays — can be placed directly over each glitter-sized cell to increase the number of photons arriving to be converted via the photovoltaic effect into electrons. The small cell size means that cheaper and more efficient short focal length microlens arrays can be fabricated for this purpose.

High-voltage output is possible directly from the modules because of the large number of cells in the array. This should reduce costs associated with wiring, due to reduced resistive losses at higher voltages.

Other possible applications for the technology include satellites and remote sensing.

The project combines expertise from Sandia’s Microsystems Center; Photovoltaics and Grid Integration Group; the Materials, Devices, and Energy Technologies Group; and the National Renewable Energy Lab’s Concentrating Photovoltaics Group.

Involved in the process, in addition to Nielson, Okandan and Gupta, are Jose Luis Cruz-Campa, Paul Resnick, Tammy Pluym, Peggy Clews, Carlos Sanchez, Bill Sweatt, Tony Lentine, Anton Filatov, Mike Sinclair, Mark Overberg, Jeff Nelson, Jennifer Granata, Craig Carmignani, Rick Kemp, Connie Stewart, Jonathan Wierer,

George Wang, Jerry Simmons, Jason Strauch, Judith Lavin and Mark Wanlass (NREL).

The work is supported by DOE’s Solar Energy Technology Program and Sandia’s Laboratory Directed Research & Development program, and has been presented at four technical conferences this year.

The ability of light to produce electrons, and thus electricity, has been known for more than a hundred years.

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Solar Technology

June 03, 2009 By: Admin Category: General

New Solar Technology Trends Around the World

Executive Summary about Solar Technology by Philip Richards

In the business of solar energy, the U.S. has not been the biggest buyer of solar power. While the U.S. does quite well exporting solar panels and solar technology, there are many Americans who still find the cost of panels very prohibitive. As the price of solar energy decreases, Europe has had a much higher demand for solar power than anywhere else in the world. Many European universities and campuses have rebuilt their dorms to run off solar energy. Most water heaters in Europe are solar-powered, even if the home doesn’t have a full solar panel system.

In Europe, it’s not just small residential power systems that are leading the way in solar energy dependence. Specifically, Italy, Greece and the Czech Republic are the newest customers of solar power systems. These countries have begun to purchase so much solar energy that their borders have seen changes in tariffs for solar panels. Japan, who’s also been at the forefront of solar panel imports, has picked up solar panel buying as the cost of gas and electricity rises. There are entire neighborhoods in Japan outfitted with residential solar power panels. For example, the neighborhood of Iwaki New Town has about 46 homes outfitted with full private solar power panels. Japan also uses solar energy in surprising places. Japan is the only country to power most of its vending machines with solar energy. Sharp, one of the largest solar panel producing companies in Japan estimates that by 2010, Japan will produce 4.8 million kWh of solar energy.

The Race For New Solar Technology Is On
Executive Summary about Solar Technology by Winifred Churchill

Companies around the world are beginning to seriously consider the POWER of solar power.

In Mexico a solar dish is being tested. The expanding and contracting hydrogen gas drives pistons which power a generator which creates electricity.
A new thin-film technology is being used on the windows of high-rise apartment buildings and skyscrapers to collect the sun’s power for use in the buildings. It is attractive and not nearly as expensive as regular solar panels.
Thin-film is attracting major manufacturers around the world.
New solar technology is using crystalline silicon cells for solar power panels.

One criticism of solar energy is that it cannot be relied upon for a steady supply of energy, but there are projects underway which are addressing that issue. In short, solar technology is going the way of the computer industry or cell phones. Now you get the same functionality available in personal computers on tiny cell phones. The new silicon cells for solar panels may bring a similar revolution to solar power making it a reliable, clean source of energy.

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Home Solar Power

May 31, 2009 By: Admin Category: Solar Home

What is a Home Solar Power System

Executive Summary about Home Solar Power by Junaid Mohammad

Installing a home solar power system in your residence is good for the environment.

Requirement

Home solar power systems can be installed on almost all homes except for a very small home which have less than 120 square feet of roof. In most cities you require building permit to install home solar power system to your building.

Working of the System

Home solar power system is installed on the roof where the solar energy is transformed into direct current (DC) power. At night this home solar power system will not work. Most of the home solar power systems are interconnected with you utility. Your utility would provide power as usual at night and during day when your electricity demand exceeds that produced by your home solar power system. In case of cloudy days the home solar power system generates less power.

Home Heating

There are other technologies which convert solar energy into heat but this home solar power system is not used for home heating.
Home solar power systems don’t have any moving parts and solar modules are also tough.

Home Solar Power Systems Generation
Executive Summary about Home Solar Power by Erick Valdes

Home solar power systems have come a long way in a short amount of time. Home solar power systems are designed to absorb energy from the rays of the sun. Today, there are three basic types of solar power for use in homes and businesses:

1. If you install an extensive solar system on your home, you can completely disengage yourself from your local power company’s clutches.

2. Augmentation systems. Most homes that use solar power use augmentation systems. These solar systems are meant to power just one particular aspect of a home’s energy needs, such as outside lights, water heaters, or appliances. The rest of the home’s energy is supplied by a traditional electrical system.

3. Backup systems. These are solar systems installed to keep a home’s power running in case of a blackout by the power company.

Home solar power systems have greatly improved in quality and performance over the past few decades. Solar power makes a home more energy efficient and is more friendly to the environment.

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Home Solar Panels

May 30, 2009 By: Admin Category: Solar Panel

Home Solar Panels

Executive Summary about Home Solar Panels by Valt Jones

Home solar panels are the desirable solution for anyone willing to substitute the polluting energy created by fuel-supplied energy plants with green and renewable source of energy. Home solar panels can either turn sunlight into electricity or hot water.

Home solar panels are smaller and inexpensive nowadays, while the rewards have grown exceedingly. Installation of home solar energy systems has become its own licensed specialty performed by licensed home solar contractors. These solar panels are the most consistent source of harvesting energy for residential solar power generation, doing better than the solar cells of previous decades. Marine and RV solar panels and specialty items, such as Powerflex flexible and portable solar panels, are also available.

You will require less home solar panels to collect the necessary energy if the sun is shining often. Home solar panels are generally designed for high voltage grid-connected systems, although they can be used for battery-based systems too. Solar panels that use single crystalline solar cells offer among the record efficiencies obtainable on today’s commercial market.

Home Solar Panels – 5 Benefits of Building a Cheap Solar Power System
Executive Summary about Home Solar Panels by Garry Jones

Earth’s fossil fuel reserves are rapidly diminishing and the price of energy is skyrocketing. More people are turning to free alternative sources of energy and many are finding great success with building home solar panels. In this article we will analyze some of the benefits of building home solar panels.

Professionally built home solar power systems can cost thousands of dollars.
With ever increasing utility bills resulting from higher fossil fuel costs the savings from home solar power systems quickly build up.
Unlike fossil fuel systems home solar panels operate pollution free.
Many municipalities and States offer incentives in the form of tax credits and rebates to help offset the cost of alternative home energy systems.
House prices have fallen recently.

Join the tens of thousands of homeowners who are building home solar panels and reaping huge savings on their energy costs. Fossil fuel prices will continue rising, solar power will always be free.

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Solar Collector

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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Residential Solar

May 27, 2009 By: Admin Category: Solar Home

Residential Solar Energy – Solve the Solar Energy Mystery

Executive Summary about Residential Solar by L J Sutherland

Residential solar energy can be incorporated into your home in many ways. The most commonly used system in homes today is the solar powered water heater. This system requires the installation of a solar panel on your roof or garden. The other system that you can use in your home is the use of photovoltaic solar panels. These panels convert sunlight into electricity. Residential Solar Energy Points to Remember:

The most commonly used system in homes today is the solar powered water heater.
The other system that you can use in your home is the use of photovoltaic solar panels.
Many countries all over the world are providing tax rebates, tax credits and sometimes even subsidies for the installation such residential solar energy systems.
If purchasing a ready made solar energy system proves to be out of your budget, you can consider building your very own unit at home. There are various DIY residential solar energy system plans available on the Internet.

Residential Solar Power – Solar Power For Homes
Executive Summary about Residential Solar by Jon Elsdon

Residential solar power for homes has become a must if we are to free ourselves of the rising cost of traditional power resources such as fossil fuels. Residential solar power for homes is the simplest alternative energy installation we can preform on our homes. Easy to install and maintain (solar panels have a life span of around 30years) a residential solar power system will have you saving money for years to come.

Regardless of whether you are looking to totally power your home with solar or are looking to supplement traditional power sources to give you a cheaper, more reliable (no more power outages), unrestricted power resource, solar power is the way to go.

Many households are turning to DIY (Do It Yourself) solar power projects.

Check out my other guide on Solar Battery

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Solar Homes

May 24, 2009 By: Admin Category: Solar Home

Solar Power For Homes – Is it Worthwhile?

Executive Summary about Solar Homes by Rob Noobert

One of the easiest ways to reduce your home electric bill and help the environment is to install solar panels in our home.

Going green in your home by using solar power helps your home budget and the environment. When you use solar power for the home, you do not have to rely on utility companies for your power. Because the power is clean and renewable, this makes the upfront costs of installing solar panels worthwhile for many people.

When building a home with solar power, you don’t have to worry about building near power lines or available grids. Solar energy helps keep our environment beautiful in many ways. Solar power for homes…is it worthwhile? Yes!

Solar Power Home Benefits
Executive Summary about Solar Homes by Malc Moore

The subject of the solar power home is becoming more and more popular in world today. There are lots of reasons for this which include, environmentall issues and fossil fuel shortages. So more and more individuals are checking out renewable energy sources such as photovoltaic power wich uses sun power to create electricity.

What Is classed as a solar powered home? A solar power home is a house which gets is electricity power supply by harnessing sun power and using photovoltaic power systems, rather than using the conventional form of electricity.

The solar power home benefits are:

Solar power is actually cheaper.
Its a fact Solar panels actually work better in winter, because of the huge temperature change in the weather.
It does not need to be sunny outside for solar power to work efficiently, because solar panels use the changes in temperature in order to create electricity.

In the event of a black out, a solar power home will therefore not be unduly affected, what with a battery, that is almost constant charged by wind and solar power. Not only will the solar panels provide extra power to the electrical grid, they will even help to reduce the electricity shortage.

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Using the Sun for Power – How It Works

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Solar Power For Home – How Much Does Home Solar Cost?

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Solar Energy Applications

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A Key Element In Solar Water Heater – Efficiency

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Greenerator by Jonathan Globerson

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Glitter-sized Solar Photovoltaics Produce Competitive Results

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New Solar Technology Trends Around the World

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What is a Home Solar Power System

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Home Solar Panels

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Solar Collector The Heart Of A Solar Heating System

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Residential Solar Energy – Solve the Solar Energy Mystery

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Solar Power For Homes – Is it Worthwhile?

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