'PAINT ALL ROOFS WHITE TO STOP GLOBAL WARMING'... - Page 3 - Mercedes-Benz Forum

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post #21 of 35 (permalink) Old 05-28-2009, 10:57 AM
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Is there a single original sentence in your post ?

Quote:
Originally Posted by cozette View Post
Increasing the solar reflectance of urban surfaces reduces their solar heat gain, lowers their temperatures, and avoids transferring heat back into the atmosphere. Over 50% of the world population now lives in urban areas, and by 2040 that fraction is expected to reach 70%. Pavements and roofs comprise over 60% of urban surfaces (roofs 20 to 25%, pavements about 40%).

The first sentence is copied word for word from here.
Quote:
Increasing the solar reflectance of urban surfaces reduces their solar heat gain, lowers their temperatures, and avoids transferring heat back into the atmosphere.

Climate Progress Blog Archive Geoengineering, adaptation and mitigation, Part 2: White roofs are the trillion-dollar solution
Quote:
Originally Posted by cozette

It's all about the benefits of titanium dioxide which not only reduces absorbed heat but additionally breaks down the nitrogen oxides that are emitted by burning fossil fuels.

This is an excellent article on the advantages to adding Tio2 to roofing and paving material:

This post goes into that age old category of ‘learn something everyday’. As regular readers of this blog know, I believe that we must do everything we can to both find alternative sources of energy and slow down the accelerating global warming trend. One of the key ways to accomplish both of these is through technological innovation.


A while ago I read an article in the New York Times that was nothing less than thrilling regarding technology and global warming. Six years ago the architect Richard Meier designed a church in Rome. The dominant design element was curvilinear white concrete. To preserve the whiteness the primary technical sponsor worked on coming up with a coating for the concrete. Six years later, the coated concrete is as white as it was when constructed, while other parts of the building have grayed due to atmospheric pollution. Now the thrilling part: the white pigment used actually ‘eats’ surrounding smog!


It was determined through testing that construction materials that contain titanium dioxide, the key ingredient in the pigment, destroy the pollutants found in car exhaust and heating emissions. In other words, titanium dioxide breaks down the nitrogen oxides that are emitted by burning fossil fuels. It is called photocatalytic cement. The maker of the pigment, Italcementi, has conducted numerous tests that have determined that some pollutants could be reduced by 20 to 70 percent. The reduction of pollutants is greatest within a distance of 8 feet. In one test a 1,000 foot stretch of highway outside Milan, with a high level of vehicular traffic was paved with titanium dioxide and it was found that there was a 60 percent reduction of nitrogen oxides at street level.


This is not only a wonderful unintended consequence, it really is an innovative technological breakthrough of the highest order in our effort to cut down or emissions that lead to global warming. Think about the concept of having the buildings and streets of cities treated with photocatalytic cement. Everyone walking down the street would be less than eight feet from sideways, streets and buildings, so the pollution people would inhale would be dramatically reduced. We could institutionalize through building codes that all concrete be coated with these materials and that regular reapplications would be mandatory.


Another positive aspect of this discovery is that one of the things that humanity has done that contributes to global warming is the vast paving of the land in the U.S. and around the world, since all this asphalt and concrete retains heat and prevents water absorption. We can now take one of our more egregious assaults on the environment and negate it to some degree. Make all our building materials act like trees!


It will take dozens, if not hundreds of such technological breakthroughs and their implementation to make substantial inroads in our effort to slow and ultimately reverse global warming. We must look at everything we do regarding energy use and consistently find ways to change our behavior and correct damage done. However, for each breakthrough we must celebrate a small victory. Three cheers for titanium oxide!

Three Cheers for Titanium Dioxide!

... and this important discussion continues.


Dooloogssst!
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post #22 of 35 (permalink) Old 05-28-2009, 11:33 AM
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Originally Posted by jplinville View Post
Gotta a question for ya...Black roofs absorb heat in the winter, slightly assisting in keeping the home warm. How much energy would be spent heating homes with white roofs in the winter months?
Gotta question for ya....just how much heat from the sun on your roof in a cold climate is helping you keep your home warm?

Most homes have insulation in the ceilings, and the space between the insulation and the inside surface of the roof is vented to the atmosphere through various means like ridge vents with inlets under the roof overhangs. None of that heat actually is used in those homes to heat the house.

The only lost "benefit" of a dark roof is the rate at which snow is melted. Snow is another form of insulation (ask those igloo dwellers) on your roof, so that is actually only an issue if it means you have to climb up there and shovel it off in a place with heavy seasonal snowfalls. Chances are, even that is not a new issue. So, from a technical perspective this is all positive, all around. Make a technical case against the recommendation or post pictures of naked women, or STFU.

You guys would shit on a winning lotto ticket if it came from anyone in the Obama administration. Instead of actually listening and thinking about things that YOU as and individual CAN DO to help you prefer to sit atop your last dump and wallow in the stench, bitching and moaning about anything and everything Obama's administration does.

Jim
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post #23 of 35 (permalink) Old 05-28-2009, 09:14 PM
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Couldn't find a picture with white paint?
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post #24 of 35 (permalink) Old 05-28-2009, 09:17 PM
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Ummm, deflected heat needs to go somewhere. So are we now embracing the holes in the ozone layer?

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post #25 of 35 (permalink) Old 05-28-2009, 09:37 PM
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Just think of how the white roofs on tar paper shacks is going to look. Maybe the US can set a fashion statement, instead of a real energy policy.

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post #26 of 35 (permalink) Old 05-28-2009, 09:47 PM
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Originally Posted by TNTRower View Post
Ahh yes little details add up don't they?
  • Billions in bailout money creating more debt (started by Bush)
  • Military commissions are ok afterall (started by Bush)
  • Gitmo won't be closing anytime soon (started by Bush)
  • Detaining Terrorists indefinitely (started by Bush)

Now for the stuff that he has actually changed:
  • Enhanced Interrogation Techniques have stopped. (but Obama reserves the right to use them again)

So the little things do add up don't they?
You really need to practice more at your red herrings and obfuscation. You are starting to get outclassed in the group.

That was just weak. But maybe that "hot countries" line in the first line of line of the article just threw you that much. Damn.

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post #27 of 35 (permalink) Old 05-28-2009, 10:19 PM Thread Starter
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Just think of how the white roofs on tar paper shacks is going to look. Maybe the US can set a fashion statement, instead of a real energy policy.
















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post #28 of 35 (permalink) Old 05-29-2009, 10:00 AM
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Rest assured tax dollars will be spent on this.

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Our project list was selected from an initial list of existing GSA pipeline projects that could be awarded within two years. The list we developed included detailed information on cost, schedule, energy benefits, and the impact on the repair and alterations backlog for each project. Our repair and alterations backlog was over $7 billion – just for minimum repair with limited consideration of high performance green features.. Our criteria in selecting projects considered both putting people back to work quickly and transforming Federal buildings into high-performance green buildings. Our selection criteria included:

• High -performance features, with an emphasis on energy conservation and renewable energy generation;
• Speed of construction start, with an emphasis on those projects that could begin within 120 days;
• Low risk that the project would fail to be completed on time;
• Condition of the facility;
• Ability to improve the utilization of the building;
• High return on investment;
• Degree to which lease costs would be avoided through the project; and
• Historic significance of the building.

Many of the projects in the new Federal construction and building modernization categories have previously received partial funding for design or for early phases of the project. With ARRA funding, we can quickly start or expand construction on these projects. At the same time, we are identifying ways to improve existing designs on these projects. This includes such improvements as:

• Adding thicker than required insulation where climatically, it makes sense to;
• Installing variable frequency drives to reduce energy and extend the life of mechanical equipment;
• Converting existing designs for parking structure lighting to LED (light-emitting diode), dramatically lowering energy consumption, while improving safety and visibility and reducing required maintenance. LEDs can last two to three times as long as typical garage or parking lot lights;
• Specifying more efficient windows than originally designed or included in the design. Often, the initial expense and long payback period for high efficiency windows precludes them from being included in building renovations; and
• Specifying dual flush toilets and waterless or low water urinals to save water and reduce demand on aging city sewer systems.

We have also identified high performance green building projects that target repairing, enhancing and tuning-up our building infrastructure. These projects are similar in scope and, therefore, can be rapidly deployed in many buildings concurrently. These projects can significantly improve the energy performance of our buildings and include measures such as:

• Installing intelligent lighting systems that provide daylight and provide controls for occupants to adjust for ambient light versus task light.
• Replacing flat roofs with ENERGY STAR membranes, integrated photovoltaic panels bonded to the membrane, photovoltaic panels, or planted roofs. These options offer benefits ranging from increasing the life of the roof, to producing energy and to reducing the “heat island” effect of a black roof. We expect to install some form of photovoltaic energy generation on 30 of the 59 roofs we are touching.
• Accelerating the installation of advanced meters—required under the Energy Policy Act to be completed by 2012. Advanced meters enable us to better manage buildings by instantaneously providing information on a building’s energy use and encouraging immediate operational changes.

An example of the innovative features we will be incorporating into some of the projects on our Recovery Act list is the Edith Green - Wendell Wyatt Federal Building in Portland, Oregon. This is a 1975 building in downtown Portland. As part of this project, GSA will install a new high-performance double glass enclosure over the entire building which will dramatically enhance energy performance and blast resistance. Each of the four facades will have a different treatment relative to the sun’s orientation. On the west façade, vegetative “fins” will provide shade, reducing the load on the new high-efficiency HVAC system that will be installed. The re-skinning of this building also upgrades the building for seismic events and will result in additional 2,000 square feet of space per floor. These are just some of the “green” improvements that GSA will make as part of this project. We expect the building to attain a LEED Gold rating.
GSA - Tracking Hearing #2: GSA Stimulus Funds-Up, Out, and Creating Jobs

... and this important discussion continues.


Dooloogssst!
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post #29 of 35 (permalink) Old 05-29-2009, 01:14 PM
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Rest assured tax dollars will be spent on this.
Thank you Captain Obvious. It's a GSA report of Stimulus Fund spending. I would think that, unless it is about pocket change of the GSA analysts, it would cover tax dollars.

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post #30 of 35 (permalink) Old 05-29-2009, 03:01 PM
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Originally Posted by mcbear
Thank you Captain Obvious.



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