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Solar Power

Simple, Concealed Solar Roof Water Heating

GreenwardRidge

Water heating can be responsible for nearly 20% of a home's energy usage. Directly heating water with the cheap viagra order online sun's energy is far more efficient than making electricity with solar panels and www.barefootfoundation.com then using electricity to viagra pill heat the www.tevaka.com water. But the appearance of rooftop water heating panels can be a drawback for some homeowners. A new option is the Greenward ridge vent from Energy Alternatives, which uses the entire roof as a heat collector (something that your roof is already doing).

The idea of using the roof as a solar heat collector is not a new one. But the way Greenward does it makes it far easier to install and still get a significant benefit. Instead of having to thread tubes back and forth throughout the entire roof, the Greenward tubes are installed just at the ridge, which should be the warmest part of the roof due to the natural ventilation.

Since the Greenward ridge vent is like other ridge vents, where the final exterior appearance depends on using the same shingles as the rest of we choice buy viagra online from canadacheap viagra tablets the roof, it isn't limited to a particular look. And, because the cost tramadol Greenward ridge vent is only installed along the ridge of the roof, it makes it an easy candidate for retrofit installations on existing homes.

Heated water from the ridge goes through a heat exchanger to store hot water in a tank. It can then be drawn directly into the hot water tank, as pre-heated water that needs much less energy before it is used or as completely heated water. For cold climate installations, the Greenward ridge vent should be filled with a water/glycol mix to prevent freezing damage.

Solar water heating generally offers one of the fastest payback periods of any green home improvement project.  This should help make it much easier to incorporate an easy, efficient system into many more homes.

link: Energy Alternatives

via: Treehugger

 

 

Four Ways to the best site where buy cialis Harvest Solar Energy from Roads

asphalt
Knowing what we know now about climate change, it's clear that the tangled web of black asphalt roads that outlines our country is working against us.  Asphalt can absorbs tons of heat, often reaching temperatures of up to 140 degrees in the summer and the process by which it's made isn't environmentally friendly either, but there may be a way to turn that pavement into an energy resource.

Researchers at the University of wow)) levitra and diarrhea Rhode Island have come up with four ways to harness the internet viagra solar energy absorbed by pavement and put it to good use and they're working on ways to implement them now.

The first, and the simplest, is is to wrap flexible solar PV cells around the top of Jersey barriers that divide highways.  Those cells would power streetlights and illuminate road signs.  Cells could also be embedded in the pavement between the barriers and buy pfizer viagra rumble strip.

The second is to embed water-filled pipes under the asphalt and the heat from the sun would warm the water.  That water could be piped to bridges to viagra 50 mg melt ice and reduce the need for road salt and ice-clearing trucks.  It could also be piped to nearby buildings for hot water and heating needs or converted to steam to turn a turbine.

Because asphalt retains heat really well, the pipes would stay warm even after sunset.  Tests have shown the water can even get hotter than the we like it buy levitra in new zealand asphalt.

The third use is to use a thermo-electric effect to generate energy.  By linking a hot and cold spot with two types of semiconductors, a small amount of electricity can be generated in the circuit.  Those thermo-electric materials could be embedded in the road (some in sunny parts and some in shady ones) and the energy produced could be used could to defrost roads.

The fourth use is the most complex and can i buy ultram online it involves getting rid of the asphalt completely and replacing it with huge electronic blocks that contain PV cells, LED lights and sensors.  The blocks would generate electricity, illuminate lanes and emit warnings when maintenance was needed.  The researchers say this technology already exists but is very expensive.  They see this technology coming to parking lots before roadways.

via Physorg

 

GlaxoSmithKline Building North America's Largest Rooftop Solar Array

gsk
Pharmaceutical company GlaxoSmithKline (GSK) is building North America's largest rooftop solar array atop their York, PA distribution center.

The array will be 360,000 square feet (equivalent to seven football fields) with 11,000 solar panels and have a capacity of 3.4 MW, enough to generic viagra quick shipping fully power the facility.  When the project is completed this December, it will be the first of the company's facilities to run completely on renewable energy, but according to GSK, it won't be the last.  A Fresno, CA distribution center is next in line for a renewable energy makeover starting sometime next Spring.

These efforts are part of GSK's recent commitment to reduce its energy consumption by 45 percent of www.kachinwomen.com 2006 levels by 2015.

via Inhabitat

 

 

World's Largest Solar PV Facility Now In Canada

sarnia2010

The largest solar photovoltaic (PV) facility in the world was completed last month. This facility is now online and is producing up to 80 megawatts of electricity. But the surprising factor is where this facility is located. It's not in the desert southwest of the United States, nor is it in China nor in Europe. Instead, the Sarnia Solar facility is in Ontario, Canada, across the border from the state of Michigan.

Partners Enbridge Energy and First Solar announced the completion of the facility earlier this month. The facility uses First Solar's thin-film panels to in order to have a very low carbon footprint for the facility. The Sarnia Solar facility eclipses the 60 MW Olmedilla Photovoltaic Park in Spain, which until now had held the when will levitra be available as a generic record for the largest PV facility.

The very favorable feed-in tarrif established by the government of Ontario was certainly a factor in this project being located where it is. The Sarnia-Lambton area also has very high solar potential (PDF), which makes it favorable for a major PV installation. According to the companies' press release, "Enbridge will sell the power output of the facility to buy discount viagra the Ontario Power Authority pursuant to 20-year Power Purchase Agreements under the terms of http://www.chemistswithoutborders.org/cheap-generic-cialis the Ontario government's Renewable Energy Standard Offer Program." Total power production is expected to be 120,000 MWh per year, which the company says will be enough to meet the needs of about 12,800 homes.

Hat tip to ThorsDigest!

 

First Solar Plants Approved for Federal Lands

stirling-suncatcher
Remember almost two years ago when we discussed the glut of applications for solar projects awaiting approval by the Bureau of Land Management?   Well, two large projects have made it through the gauntlet and are ready to move forward, marking the buy levitra low price first solar projects approved for federal land.  Two down, hundreds left to go.

Today, Secretary Salazar approved the 709-MW Imperial Valley concentrated solar project and www.hasselaar.nl the 45-MW Lucerne Valley solar PV project, both to be located in the California desert.  When completed, the two projects will be able to buy real cialis online without prescription produce enough energy to power 226,000 - 566,000 homes and create 1,000 jobs.

The Imperial Valley project is being developed by Tessera Solar using Stirling Energy System's Suncatcher Dish-Engines.  It will cover 6,360 acres in Imperial County and already has a power purchase agreement with SDG&E.

The Lucerne project is being developed by Chevron Energy Solutions.  It will take up 422 acres with 40,500 solar panels in San Bernardino County.

Since much of the public lands were put aside for conservation purposes, the projects each went through extensive environmental reviews and the companies were required to come up with ways to mitigate environmental impact.  Interior Secretary Ken Salazar pointed out that these projects, though large, only make up one-hundredth of a percent of the 11 million acres of California desert managed by the government.

The next proposed solar project to make it through is likely BrightSource's Ivanpah 400-MW solar thermal project, which is awaiting final decision.

via DOI Release

 
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