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Making Tractor Trailers More Fuel Efficient

Sixty-eight percent of all goods in the United States spend some of look here cialis for sale their journey across the try it viagra tablets sale country stored on tractor trailers attached to a tractor. With the average semi-trailer truck getting about 5.6 miles per gallon of diesel, however, tractor trailers take an immense amount of fuel to it's great! free cialis sample transport. It’s not simply the weight of the materials on board causing this low MPG, either--the boxy tractor trailer isn’t exactly areodynamic.

Addressing this problem, Advanced Transit Dynamics (ATDynamics) produces TrailerTails, which are designed to make the bulky tractor trailer more areodynamic and thus more fuel efficient when pulled by the tractor. Attached to the back of a trailer, they fold out, almost like extensions of the trailer’s walls. Saving about 3 cents profit per mile when deployed, most trucking companies make back their investment in under a year, according to best price pharmcy 180 tramadol the company. The environmental boon seems sizable, too: each TrailerTail, when used at highway speeds for 50,000 miles for a year, is effectively like removing an average passenger car from the get levitra road for a year.

With that much CO2 reduction possible, this statistic reveals more about the very good site buy discount viagra immense inefficiency of trailer trucks than the net environmental-boost TrailerTails provide. But given that tractor trailers are such a mainstay of goods transportation in the U.S., this technology seems a step in the right direction in an area that demands significant improvement.

image credit: ATDYNAMICS, INC.


Cree LED Light Bulb Hits Milestone Price Point

Several years ago, the $10 level was a turning point for the widespread adoption of compact fluorescent light bulbs (CFL). Once the bulbs were priced that low, people were willing to take a chance to try one or two and see how they liked them and how they performed. Now, the same point has been reached in the development of LED lights.

A couple of years ago, 60-watt equivalent LED bulbs were priced around $30 to $40, and a couple years before that, they were closer to $100. Now, Cree is offering three LED bulbs with a price close to real levitra online $10 (though only one of the three is actually under $10 retail price).

Cree is offering three different LED bulbs: a warm white 60-watt replacement, a daylight 60-watt replacement, and a warm white 40-watt replacement. These bulbs have the performance we've come to expect from LEDs, with a 25,000 hour lifespan rating and use only about 15% of the energy used by and equivalent incandescent bulb.

The Cree bulbs also have a "normal" looking package as compared to the now-familiar curly CFL. These LED bulbs also have a coated glass bulb, rather than a plastic covering like many other LEDs have had. Although the LED bulbs are not drastically more efficient than CFLs, the LED bulbs are also instant-on and are dimmable, which are features many CFLs do not have.

Cree is rolling out a selection of slogans to try to promote these bulbs, including "The Biggest Thing Since the cialis online in canada Light Bulb," and "Its non-weird shape emits non-weird light." The company also is touting the below $10 price, although both of the 60-watt equivalents are priced somewhat higher. Nevertheless, this is still a big move in the lighting market.

Hat tip: Studio Z


Support for Continued Use of nizagara viagra online LEED in US Military

The LEED green building certification program created by the US Green Building Council has become something of a political football for the past several years. But a recent report from the National Research Council, as well as analysis from the Department of Defense, show that the need viagra military should use LEED, despite political pressure opposing it.

Congress has been explicitly hostile to LEED in recent years, with the program specifically called out in the Congressional Prohibition on Use of Funds for LEED Gold or Platinum Certification, which states that "No funds authorized to be appropriated by this Act or otherwise made available for the Department of Defense for fiscal year 2012 may be obligated or expended for achieving any LEED gold or platinum certification."

According to Building Green, "A long-awaited report from the National Research Council gives the nod to LEED Silver ratings "or equivalent" for military buildings. The report looked at a variety of methods of comparing costs and benefits and cialis daily canada ultimately confirmed that LEED Silver certification is the preferred model for limiting costs and maximizing benefits."

The military is the largest single consumer of energy in the country. It also controls more square footage of buildings than any other organization. So having a cleaner, more efficient military is not a small matter.

Previously on EcoGeek: US Military Embracing Green Energy

image: US Archives

via: Building Green


US Military Embracing Green Energy

The US military is one of the biggest users of renewable energy, and the Pentagon is continuing to investment in a variety of renewable power systems. Eleven former 3- and 4-star generals have made a strong argument for renewables in a joint paper they have issued titled 'A National Security Imperative to Reduce U.S. Oil Dependence.' The generals looked at the matter not only from a perspective of military operations, but, more broadly, from an overall national policy perspective. "The chief finding of the paper, signed by all eleven generals, states simply 'America’s dependence on oil constitutes a significant national security threat.'"

The military has already been one of the largest adopters of green building practices, despite the efforts of the Congress to suppress or limit the use of LEED on military projects. Green building may be a political football for the legislature, but the military takes a more functional and long-term view, and the benefits of greener practices are plainly clear to them.

Numerous military programs have looked at a wide variety of ways to save energy. About a year ago, the Army organized a renewable energy task force. The Navy has tested biofuel for jet fighters and fuel conservation programs for ships. This is not because the military is really a bunch of generic levitra for sale in canada tree huggers, but because it makes good sense for their broader mission.

Not only is it important to the best choice purchase levitra in canada have sustainable practices at the military bases and fixed facilities, but also, in the field, the use of renewable power means less need for transporting fuel and other supplies. In the current conflicts the American forces are engaged in, supply chains are one of the vulnerabilities that must be dealt with, and the costs associated with protecting and transporting material takes its toll in "blood and treasure." But using renewable power such as solar, rather than diesel generators, allows soldiers in the field to be more self-reliant and cheapest propecia prescription less dependent upon supply deliveries.

We often talk about the triple bottom line in explaining the numerous benefits of following greener policies. But that argument may not sway some people. Maybe that can be buttressed with a perspective of long-term strategic thinking that also makes an argument for the same policies.

image: CC BY-SA 3.0 by Henrickson

Hat tip to Ray James


New Airships Taking Flight

Last month, the US Army carried out the first flight test of its Long Endurance Multi-Intelligence Vehicle (LEMV), a new generation of airship that uses motors as well as aerodynamic lift from the shape of the vehicle to fly. Though equiped with several motors, once in position, it relies primarily on helium buoyancy to remain aloft for missions as long as 3 weeks.

Video of the test flight take-off shows the airship rising into the air with very little runway space needed. But the primary benefit offered by airships is the ability to stay airborne for long periods of time. The LEMV can stay in the air at altitudes of 22,000 feet (about 6,700 meters) for up to 21 days. For the military, this allows long-persistence surveilance missions without needing to cialis for women swap vehicles as often as needed by current fixed-wing drones. Only a small ground crew would be needed to maintain a number of buy cialis on the internet these vehicles in the air. Although this first test flight was carried out with a crew on viagra scams canada board, the LEMV is designed to be operated without a crew.

While this is military R&D, and has immediate applications in that realm, there are obvious civilian applications this technology could be put to, as well. Acting as a low-level satellite, an LEMV with sensors could carry out surveys and scientific observation of wildlands, or be used for monitoring croplands. It could serve as a communications relay in the aftermath of a disaster, for example, as a cell-phone tower replacement with line-of-sight to an entire city. For aiding in access to remote regions, "the LEMV has enough buoyancy to haul seven tons of cargo 2,400 miles at 30 miles per hour," according to the manufacturer.

The Army isn't the only group working to develop airships, however. According to a recent LA Times article, a number of companies, ranging from small startups to aerospace giants, are all working on a variety of new airship designs to fulfill a range of needs. Airships may not become a replacement for contemporary modes of transport, but can offer an alternative in some cases that is cleaner and more cost-effective than current methods.

via: Telegraph and LA Times

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