06 Sep '11, 11am

Ask Pablo: Do Solar Panels Contribute To The Heat Island Effect?

Basics of Absorbing the Sun's Energy The average reflection coefficient (think of 1.00 as a perfect mirror, and 0.00 as a surface that absorbs all incoming energy), or albedo , of the earth is between 0.30 and 0.35. When humans move in and pave everything, that albedo decreases -- meaning that more solar radiation is absorbed. The albedo of fresh and worn asphalt is 0.04 and 0.12 respectively. The average insolation (the term for the amount of the sun's energy reaching the earth) over all 24 hours of the day is 250 Watts per square meter, which is the amount of energy used by about 25 CFLs. Cutting the albedo in half by changing the reflectivity of the land effectively doubles the amount of energy absorbed. A square meter of asphalt might absorb an average 225 W/m2 per day, or 5.4 kilowatt-hours (kWh), worth of energy. What Is A Cool Roof And How Can We Benefit From Lighte...

Full article: http://www.treehugger.com/files/2011/09/ask-pablo-solar-p...

Tweets

Ask Pablo: Do Solar Panels Contribute To The He...

treehugger.com 06 Sep '11, 11am

Basics of Absorbing the Sun's Energy The average reflection coefficient (think of 1.00 as a perfect mirror, and 0.00 as a ...

Home Solar Lease: Pro and Con

thedailygreen.com 07 Sep '11, 12pm

Photo: SolarCity related articles By Jim Motavalli In 2008, a company called SolarCity announced that instead of just sell...

violaerin: trails ablaze holidaze "Ask most

violaerin.livejournal.com 06 Sep '11, 11am

you are using ricoh gxr? where and how much you bought it for? i saw it at funan IT mall just the body is 430 bucks. wat k...

How to sell Christmas Island?:

mysingaporenews.blogspot.com 10 Sep '11, 12am

Christmas Island was sold against the interest of Singapore. But then, what could the residents of the island do when they...

The After-Cost Effect of Daily Follow-Through

The After-Cost Effect of Daily Follow-Through

thefinance.sg 07 Sep '11, 7pm

The After-Cost Effect of Daily Follow-Through by Student on September 7, 2011 I have examined the naive DFT strategy in a ...

Very cool!

sustainablesources.com 05 Sep '11, 1pm

Consider Hybrid Geothermal Heat Pump New research shows that installing a hybrid geothermal heat pump system can significa...

"Yes. One of the reason I took up Singapore cit...

theonlinecitizen.com 12 Sep '11, 4am

it’s true that our ancestors were like him, foreign immigrants, foreign immigrants came to Singapore to build a life and a...

How Tiny Solar Trucks Can Save American Cities ...

treehugger.com 06 Sep '11, 11am

In the Dutch cities of Utrecht and Haarlem, and later this month in the city of Enschede , a partnership between municipal...

GGWVS 2011: Don't Miss 7 Expert Panels! - Green...

greenroofs.com 08 Sep '11, 7am

U.S. Congressman Tom Reed from the 29th district of New York, Tom Ferraro, CEO of Foodlink – a national network of 200 foo...

Leasing solar panels for your home: worth it or...

thedailygreen.com 07 Sep '11, 12pm

Photo: SolarCity related articles By Jim Motavalli In 2008, a company called SolarCity announced that instead of just sell...

Solar Radiation Basics #Solar #Renewable

renewableenergyworld.com 09 Sep '11, 6pm

The sun and its radiation have agreat impact on the entire earth. Most forms of fuel and energy have derivedtheir power fr...

Solar on Someone Else's Land, pt.2: Solar Farm ...

treehugger.com 06 Sep '11, 7pm

Image credit: Convergence Energy The other day, I posted on the spread of community solar gardens that offer everyone a ch...

Hybrid Panels Increase Solar Efficiency

Hybrid Panels Increase Solar Efficiency

jetsongreen.com 13 Sep '11, 5am

Photovoltaic panels and solar hot water panels both provide useful benefits for the buildings they are attached to, but so...

Fresh from their Faroes campaign, Sea Shepherd Marks 'Little Green Holm' Island as a Seal Sanctuary

Fresh from their Faroes campaign, Sea Shepherd ...

ecorazzi.com 06 Sep '11, 2pm

After their summer campaign in the Faroe Islands to stop the slaughter of pilot whales, the Sea Shepherds made a stop to v...

Un-Analytics: Google’s Solar Panel Performance Problem via @triplepundit

Un-Analytics: Google’s Solar Panel Performance ...

triplepundit.com 09 Sep '11, 9am

“ The reduction in power from shading half of one cell is equivalent to removing a cell active area 36 times the shadow’s ...