Tag Archives | photovoltaic

Renewable Energy: A World Review

Renewable energy is so named because it is derived from such natural raw materials which do not get exhausted; for instance, sunlight, air, rain water, tides and geothermal energy. Renewable energy consumed in 2008 was around 19%. New renewables such as modern biomass, small hydro etc. delivered around 3% energy. The most leading is the […]

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Solar Sail, Enough Renewable Energy for Earth’s Population?

Scientists at Washington State University have proposed a renewable energy behemoth: A solar sail that traps solar wind deep in the atmosphere. The idea is essentially splicing traditional solar and wind renewable principles, only on a far, far larger scale. To put the sheer size of the sail in perspective, the sail proposed will be […]

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Four Solar Road Designs Unveiled by University of Rhode Island

There are 2.7 million miles of public roads in the United States, and in the past we’ve seen several innovative designs that transform these paved surfaces into energy and heat-generating solar roads. One company, Solar Roadways, has even come up with a prototype solar panel for roads, however they are expensive ($7,000 each) and it […]

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Ground Heat Source Pumps

How Do They Work? Ground source heat pump systems do not heat a home by burning fuel. They collect heat from the Earth via a pipe or pipes buried in the ground. These pipes are called loops and contain a mixture of water and antifreeze. The fluid is circulated through these loops by an electric […]

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Solar Energy Gains Steam—or Rather, Hydrogen

Solar power is arguably the cleanest energy source there is. But it’s also relatively inefficient—arguable from a technical standpoint, perhaps, but certainly not from a practical one. That can soon change. A new Atlantic report says that inventor Lonnie Johnson may have figured out how to turn solar heat into electricity with twice the efficiency […]

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DuPont speeds up forecast for $1 billion in solar sales

DuPont now expects $1 billion in photovoltaic market sales this year, up from a previous forecast to hit that mark in 2011, saying interest for solar materials continues to spike. The company, which also makes a range of chemicals and iconic products like Kevlar and Tyvek, said the new forecast is due to research that […]

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1 300 GW of untapped hydropower in developing countries

The World Bank has reaffirmed its commitment to “scaling up” its support for hydropower infrastructure in developing countries, which it describes as the largest source of renewable and low-carbon energy. This policy aspiration, which is contained in a newly published report entitled ‘Sustaining Water for All in a Changing Climate’, points out that only 23% […]

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How a solar geyser works (animation)

This is an example of solar water heating system with a vacuum tube collector (there are two main solar geyser collector types, the other one being the flat-plate collector).  Solar energy, whether solar panels (photovoltaic systems) or solar water heating systems are employed, is becoming the major renewable energy source that is reducing our dependence […]

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