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EcoGeek - Brains for the Earth

MAY 30

Recent Comment

"Variations in the earth’s climate is not new, the variation in clima..."

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SciShow: A History of usefull link levitra 20mg Earth's Climate
Written by Philip Proefrock on 30/05/13   

Is variability in the Earth's climate something new or has the climate always been changing? And, is it something that we should be concerned about?

In this week's Sci Show, Hank goes through a history of Earth's climate and finds a variety of factors that have influenced climate over time.

"Temperatures are increasing faster than they ever have. In the past 100 years, temperatures have risen so dramatically that thay have cancelled out all of the cooling that took place over the past 6,000 years."

 

JUN 14

Recent Comment

"This is really a great news. I prefer to use solar system to build ene..."

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New Design for Efficient Concentrating Solar Power
Written by Sarah Rich on 14/06/13   

Scaling up solar energy collection means addressing a critical problem. While additions like anti-reflective coatings can boost efficiency on solar panels, the more solar energy a collector gathers, the hotter it gets--and if temperatures rise too high the heat could damage the follow link canada cheap viagra device.

A group at IBM Research - Zurich is addressing this problem and announced on Earth Day 2013 that they are developing a High Concentration PhotoVoltaic Thermal (HCPVT) system. IBM says the collector will be able to generate significantly more electrical power from the sun’s rays than comparable systems while staying cool enough to levitra 100 function.

According to IBM, the proposed HCPVT system’s dish contains hundreds of photovoltaic chips, and the rate at which it can generate electrical power is about 25kW. With the help of a microchannel water cooling system, the system is levitra sales online capable of concentrating the power of buy cialis overnight 2,000 suns, on average, and converting 80 percent of the radiation collected.

In a video, a research scientist at Zurich explains the solar radiation concentration methods that will be used in the proposed system.

The design offers other efficiency boosts: the hot water produced in the microchannels can be used for air conditioning or filtered for drinking. More electrical power and a useful hot water byproduct aren’t the only boons; as with many systems designed to increase efficiency, it promises to be more cost effective as well. Although IBM’s press release on viagra 30 mg the canadian healthcare, generic cialis proposed system doesn’t mention any market plans, it does claim that the design is suitable for mass production. If they do go beyond prototype stages, IBM states these systems could be built at a cost three times lower than comparable systems, and may help deliver electricity, fresh water, and cool air to remote locations.

via: Engadget

screencaptured image via IBM Social Media

 

JUL 08

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"MIT is doing excellent work here. There needs to be more innovative, s..."

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MIT's Solar System Estimates City's Solar Power Potential
Written by Sarah Rich on 08/07/13   

Researchers at MIT have developed a new 3D solar potential mapping tool. The first rooftop solar mapping module of the Mapdwell platform, Solar System is available to anyone with Internet access. Incorporating factors ranging from roof angles and surface temperatures to local weather data and physical obstructions,

Solar System has been able to predict within 4 to 10 percent of photovoltaic (PV) panels' annual electricity yield during testing. MIT's home city of Cambridge, Massachusetts is the first to http://www.pneumapaniagua.es/buy-cialis-generic get a complete solar map of its 17,000 rooftops. According to Solar System, if PV panels were installed at all rooftop locations deemed "good" or better, they could provide one third of the city's energy needs for roughly $2.8 billion.

Solar System is inviting to play with and easy to use. But for all of the data it offers on potential expenses, tax credits, and revenue, these estimates cannot replace on-site evaluation for solar projects, as the "important notice" on any "Solar Electric Potential Report" states (example here). As with older solar mapping tools like the San Francisco Energy Map, since Solar System might not incorporate all real-world conditions into its analysis of a potential site, the use-value of tramadol no prescription the system seems more motivational and symbolic than strictly informative and canada generic levitra technical.

For those interested in PV panel installation on rooftops in Cambridge, it is an accessible place to start. As a way to generate awareness of solar power potential, Solar System could also offer those who hadn't considered PV panels for their buildings reasons to investigate it further. However, consumers exploring the possibilities on the map can only determine what PV panels may potentially, but not with certainty, generate and cost.

via: Treehugger

screen capture via Mapdwell Solar System

 

JUN 21

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"I guess it is about time to discover more natural resources that have ..."

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Sulfur Makes Safer, More Efficient Batteries
Written by Philip Proefrock on 21/06/13   

Sulfur continues to offer promise in the energy storage realm. Low- cost lithium sulfur batteries were just a research topic a few years ago, and are now moving closer to discount viagra viagra practicality with new developments that could offer four times the energy storage of lithium-ion batteries.

Researchers at Oak Ridge National Laboratory have developed a technique that uses a solid electrolyte to produce a stable, low-cost, sulfur-based battery. "The new ionically-conductive cathode enabled the www.drk-dillenburg.de ORNL battery to maintain a capacity of 1200 milliamp-hours (mAh) per gram after 300 charge-discharge cycles at 60 degrees Celsius. For comparison, a traditional lithium-ion battery cathode has an average capacity between 140-170 mAh/g. Because lithium-sulfur batteries deliver about half the voltage of lithium-ion versions, this eight-fold increase in capacity demonstrated in the ORNL battery cathode translates into four times the gravimetric energy density of lithium-ion technologies."

Sulfur is a plentiful element, and is often a waste product of industrial processes, making it very cheap and readily available. Sulfur based batteries are also said to be less prone to instability and accidental fire than present lithium ion batteries are in part because the electrolytes are solid rather than liquid.

Sulfur has been part of 100mg generic viagra large-scale sodium sulfur batteries for many years, but that technology requires high temperatures, and is best suited for industrial applications. The new developments offer the possibility of bringing sulfur-based batteries to consumer level applications.

image: sulphur and calcite CC BY-SA 3.0 by Didier Descouens/Wikimedia Commons

via: Treehugger (HT: Megan Treacy)

 

JUL 25

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"I would love to try this out and own an electric bike! Patrick P. Sta..."

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Rubbee TurnsRegular Bicycles into Electric Vehicles
Written by Sarah Rich on 25/07/13   

Joining other developments in electric bike technology, a compact electric drive called Rubbee electrifies most regular bicycles in less than a minute. Cyclists looking for the occasional extra boost on the road can clamp the electric drive just below the seat (fitting tubes ranging from 22-35 mm), where its polyurethane cast friction wheel meets the bike’s back tire. A throttle, installed on the handlebars, stays on the bike with or without the we use it non prescription levitra drive. Pedaling is www.pjr.com optional once Rubbee is switched on; its wheel turns the back tire, allowing the cyclist to cialis best price have perscription travel for 15 miles and reach a top speed of 15 miles per hour without needing to pedal.

Its integrated battery pack ensures easy travel on link for you get cialis online level terrain or at an incline, and can be charged every day for 5 years without loosing range. Its integrated suppression system, enabled by a removable fixation pin, keeps a constant force on the tire. Rubbee can stay on the bike without touching the back tire with the pin put in place, useful for when Rubbee’s out of juice or when a cyclist would rather travel by pedal power alone.

The London-based company, currently seeking funds via Kickstarter, states that Rubbee gets its name for the way the friction wheel rubs the bicycle tire without significant wear. It weighs 14 lbs, which could take some getting used to for those keeping Rubbee installed while it's turned off, but only takes 2 hours to fully recharge, and includes an LED tail light for more visible travel at night. While it costs £699 (roughly $1073), for those who can afford it, a drive like this would give cyclists some help up those hills.

via: EarthTechling

image via Rubbee Ltd

 


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