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Solar Power

Grid-Tied Renewables Savings Outweigh Costs

The additional costs associated with adopting renewable energy are frequently used to argue that it is too expensive to adopt renewables. However, the National Renewable Energy Laboratory has taken a look at the costs and viagra jelly for women offsets from renewable energy use and finds "The answer: the cost is a tiny fraction of the ultimate savings."

Although the costs for the equipment needed to http://www.filmusa.org/drug-generic-viagra integrate renewables into the levitra order existing grid are not insignificant, the associated savings in reduced fuel costs are far greater. Cycling fossil power plants to generate power intermittently also increases wear on generic cialis us pharmacy the equipment, which leads to increased maintenance costs. But overall, the savings are far more than the increases.

The other key finding is that, as renewables continue to be integrated into the grid, the continuing costs will become smaller. Making the systems able to work with renewables connected to the grid is www.bsd-berlin.de something that gets easier and less expensive. So, in a way, the early adopters have made an even bigger contribution to improving the energy infrastructure.

via: Ars Technica

 

New Solar Cell Material Offers Both Cheap and Efficient Power

Another potential path for ever cheaper solar power is now being researched by scientists investigating the use of perovskite minerals to generic cialis from india buying make solar cells. Perovskites are a very cheap material that have good light capturing properties as well as good conductivity. The advantage that perovskites offer is a great combination of inexpensive production combined with good efficiency in energy production.

Current laboratory experiment versions of perovskite-based solar cells have efficiencies of about 15 percent. Although there are other solar cells with greater efficiency, the figure for perovskite cells is higher than other cheap-to-manufacture methods.

The advantages provided with perovskite materials come from requiring a far less intensive manufacturing process. While fabricating silicon-based solar cells requires careful and expensive processing of www.grantontrailers.com silicon to a high degree of purity (not to mention the buy cialis next day delivery energy intensity of that manufacturing), cells using perovskites are made by spray applying materials to a glass or metal foil substrate, described as a "solar cell [that] can be fabricated as easily as painting a surface."

Perovskite-based solar cells might eventually be able to be produced for 10 to 20 cents per watt, as compared to present soalr panels which are around 75 cents per watt.

image: by Andrew Silver, USGS via Wikimedia Commons

via: MIT Technology Review

 

Biomimetic Vascular Solar Cells

Researchers at North Carolina State University have come up with a new way of making solar cells with a method that uses circulation much like that in plant leaves to maintain the efficiency of the cells.

Dye-sensitized solar cells (DSSC) are organic cells that use light-sensitive dyes to generate electricity. These cells could eventually make low-cost and more environmentally-friendly collectors for solar energy, but until now, the problem has been that the dyes eventually break down due to jaygalbraith.com ultraviolet rays from the sun and lose their efficiency.

The NCSU scientists have created a cell with vascular chanels, much like the veins in a leaf, to allow them to replenish the dye and viagra fast delivery thereby maintain the efficiency of the cell. Lead author Prof. Orlin Velev describes the process: “We considered how the cheap canadian pharmacy branched network in a leaf maintains water and nutrient levels throughout the leaf. Our microchannel solar cell design works in a similar way. Photovoltaic cells rendered ineffective by high intensities of ultraviolet rays were regenerated by pumping fresh dye into the channels while cycling the exhausted dye out of the cell. This process restores the device’s effectiveness in producing electricity over multiple cycles.”

DSSCs are made with "a water-based gel core, electrodes, and inexpensive, light-sensitive, organic dye molecules that capture light and generate electric current." The simpler, non-metallic makeup of cialis brand these cells could make them less expensive to produce, and could mean less extraction of rare minerals required in order to continue to provide solar energy.

via: Cleantechnica

 

Solar Decathlon 2013 Is Underway

The biennial competition to build attractive, appealing, solar-powered homes is now underway, with the 2013 Solar Decathlon's opening ceremonies being held today. Unlike previous years, when the event has been held on the National Mall in Washington DC, this year the Decathlon is being held in Irvine CA. Nineteen teams from across the buy cialis fedex shipping US and Canada, as well as teams from Austria and the Czech Republic are taking part in this year's event.

The Solar Decathlon is made up of 10 different events judging a range of features of these designs, including their energy performance, the livability of each house, and the overall construction budget. This year's entrants are targeting an estimated real-world construction cost of not more than $250,000.

In addition to the competition itself, there is an exposition called XPO being held adjacent to the Decathlon. This program contains a number of www.roli-guggers.de clean, renewable, and energy efficient products and demonstrations. According to the Department of Energy, "The winner of the overall competition is http://revistaneon.net/buy-real-levitra-online the team that best blends affordability, consumer appeal, and design excellence with optimal energy production and maximum efficiency. "

The competition and exhibition of these projects continues through Sunday, October 13, 2013. The overall winner of this year's Decathlon is scheduled to buy cialis proffessional online be announced on Saturday, October 12.

image credit: Richard King/U.S. Department of Energy

 

Solar Drone Aircraft Work As Atmospheric Satellites

Part of the resurgence of airships in recent years has been due to research carried out with an eye toward long-duration purposes such as surveillance, imaging, and even serving as regional wireless antennas. But developments in unmanned aerial vehicles and 5mg cialis military drones, as well as improvements in solar powered aircraft are being combined into smaller, unmanned, conventional aircraft. The advantage of high-altitude and long-term persistence that was once the sole province of http://www.bsz-wurzen.de/cialis-20mg satellites is now becoming more readily available as winged drones seem poised to leap past airships.

One example is the Titan Aerospace Solara 50, which has the potential to carry up to 70 pounds (31.75 kilograms) of payload and stay aloft at an altitude of 60,000 to 70,000 feet (18.3 to 21.3 kilometers) and remain there for years. Of course, in the current security-focused environment, the initial targets for these drones will most likely be military and policing applications with their enormous budgets. But, as the technology is developed and becomes available, scientific and civilian commercial uses for these drones will come into play.

"The Solara 50 has a 50 m (164 feet) wingspan. The upper surfaces of its wings and tail are packed with over 3,000 photovoltaic cells capable of generating up to 7 kilowatts." Titan is also developing a larger model, the Solara 60, which will be able to carry a larger payload of up to 250 pounds (113.4 kilograms). Furthermore, the Solara 60 could also provide 100 watts to the payload, enabling quite a range of equipment to be powered on board the viagra generic brand craft.

via: ArsTechnica

 
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