Posted by Jeff Condon on May 28, 2009
Chairman Chu is at it again. I really shouldn’t look at the news.
U.S. energy secretary, Steven Chu Photo: BLOOMBERG
Speaking at Cambridge University this week, Dr Chu suggested we paint the roofs and pavements of our towns and cities white, as it will help the planet reflect, rather than retain, heat from the sun. “You change the albedo of the Earth,” he explained. “The sunlight comes down and it actually goes back up. There is no greenhouse effect.”
Of course the light goes back up, it’s even fair to say more light goes back up from a white roof than from a dark one. Consider what that means for CO2 in say THE NORTH. I rather like a black roof on my house. It saves energy. In Illinois, a large percentage of our electricity is good old fashion nuke power. Considering that means any AC I use (one month per year) is evil carbon free. Painting my home or office roof white would result in greater (natural gas) heating cost in the winter increasing CO2 and less of the already minimal cooling cost which is carbon free. Perhaps we should make our roof’s black — oh yeah WE ALREADY THOUGHT OF THAT!
Government’s can’t do a damn thing right.
According to Jake Hacker, a senior scientist in the built-environment physics department of the world’s largest architectural engineering firm, Arup. “There are lots of people looking in to ways of reducing the ‘urban heat island’,” he explains.
“The cooler the town, the less air con used, which would reduce CO2 emissions. It’s not clear, however, if white is the best way of achieving that. Lots of reflecting surfaces in one place could cause horrible glare. And maintaining white on pavements and roads would be expensive.” He paused, then said, encouragingly: “But white surfaces definitely have a part to play. It’s just…”
“Well, the surface of the earth receives on average around 280 watts of energy per square metre, and only 1.5 per cent of the surface is cities or towns. I think we’re going to have to look at other things.
It’s like these ‘scientists’ can’t figure out that urban heat island happens in the winter too. What are they going to do to cities like Chicago and New York where the heating bills are usually worse than the cooling bills. Governments need to stay out of these decisions, when Chairman Chu pretends businesses don’t already follow the best available cost savings my blood pressure goes up. It’s just another baby step in the cycle of fear and control.
Source article link HERE.