February 2009 Archives
Scientists at MIT are testing a new power generation, storage and propulsion system known as the GreenWheel that will turn any pedal bicycle into an electric hog."Just take the wheel off, put a GreenWheel equipped wheel on in its place, plug it in and it should work just fine," said Ryan Chin, one of the GreenWheel designers. "The whole thing has been designed so all the parts except the throttle are enclosed in the wheel."
From the outside, the GreenWheel has the radius of a small dinner plate and is about 2 inches thick. Inside the aluminum frame sits the three major GreenWheel components: an electric generator, batteries and an electric motor.
Image: MIT lab
Via: MSNBC
The Carolyn Dorothy, displayed before a large crowd in the Long Beach, California area on January 23, was built by Seattle, Washington-based Foss Maritime. This tug joins a fleet of existing standard tugboats servicing the needs of the ports of Los Angeles and Long Beach.
So what exactly makes this Green Assist tug a hybrid? Foss first detailed this project back in 2007. In place of a traditional tugboat engine, this boat is powered by two 670 horsepower battery packs coupled with two 335 horsepower diesel generators.
More on: Inhabitat
Arctic Ice Extent Understated Because of "Sensor Drift"
dtjohnson writes "The National Snow and Ice Data Center (NSIDC) has been at the forefront of predicting doom in the arctic as ice melts due to global warming. In May, 2008 they went so far as to predict that the North Pole would be ice-free during the 2008 'melt season,' leading to a lively Slashdot discussion. Today, however, they say that they have been the victims of 'sensor drift' that led to an underestimation of Arctic ice extent by as much as 500,000 square kilometers. The problem was discovered after they received emails from puzzled readers, asking why obviously sea-ice-covered regions were showing up as ice-free, open ocean. It turns out that the NSIDC relies on an older, less-reliable method of tracking sea ice extent called SSM/I that does not agree with a newer method called AMSR-E. So why doesn't NSIDC use the newer AMSR-E data? 'We do not use AMSR-E data in our analysis because it is not consistent with our historical data.' Turns out that the AMSR-E data only goes back to 2002, which is probably not long enough for the NSIDC to make sweeping conclusions about melting. The AMSR-E data is updated daily and is available to the public. Thus far, sea ice extent in 2009 is tracking ahead of 2005, 2006, 2007, and 2008, so the predictions of an ice-free north pole might be premature."- Cost - The current cost of Li-based batteries (the most promising chemistry) is approximately a factor of three-five too high on a kWh basis. The main cost drivers being addressed are the high cost of raw materials and materials processing, the cost of cell and module packaging, and manufacturing costs.
- Performance - The performance barriers include the need for much higher energy densities to meet the volume/weight requirements, especially for the 40-mile system, and to reduce the number of cells in the battery (thus reducing system cost).
- Abuse Tolerance - Many Li batteries are not intrinsically tolerant to abusive conditions such as a short circuit (including an internal short circuit), overcharge, over-discharge, crush, or exposure to fire and/or other high temperature environments. The use of Li chemistry in these larger (energy) batteries increases the urgency to address these issues.
- Life - The ability to attain a 15-year life, or 300,000 HEV cycles, or 5,000 EV cycles are unproven and are anticipated to be difficult. Specifically, the impact of combined EV/HEV cycling on battery life is unknown and extended time at high state of charge (SOC) is predicted to limit battery life."
Recently Measurement Lab was 'unveiled' by its sponsors, among which Google, New America Foundation's Open Technology Institute and the PlanetLab Consortium. As they state themselves on their website: Measurement Lab (M-Lab) is an open, distributed server platform for researchers to deploy Internet measurement tools. The goal of M-Lab is to advance network research and empower the public with useful information about their broadband connections. By enhancing Internet transparency, M-Lab helps sustain a healthy, innovative Internet. The good part is that they launched some interesting tools for Users, among which a tool named 'Glasnost', which tests whether your internet service provider blocks or hinders BitTorrent. Other tools deal with testing your connection speed or with determining whether your ISP is giving priority to some traffic or users above others (coming soon). The not so good part is that they do collect information about you, your IP-address and your ISP. Maybe not so bad, since they are quite open about it, but think whether you want this before using their tools. And a word of warning: they clearly are in the development phase since their tools are not that easy to use. But fun if you enjoy this kind of stuff.
Green Car Congress reports that responding to a question from a city councilwoman about transportation and infrastructure in the stimulus bill during a town hall forum in Ft. Myers, Florida, President Obama said that the days of just building sprawl are over. He mentioned further that transportation is not just fixing our old transportation systems but its also imaging new transportation systems and that we should be using this money to help spur this kind of innovative thinking when it comes to transportation. That will make a big difference. Yes, he gives hope. Let's help him realize his plans! The discussion below the article on Green Car Congress is not bad at all, by the way. And to show that the conservatives in Britain are good friends with Obama, the Tories presented what they call a long-term vision for the railways, which includes a high-speed north-south rail line between Manchester and London.
Link and picture from: Register Hardware
Volvo Cars started manufacturing in 1941 the PV56 with a wood gasification unit on the back as an answer to wartime petrol shortage. This PV51 of '37 has been converted during the war. So can we built mobile units to produce biogass on locations where lumber isn't easily transported from? YES WE CAN! Might biogass be like concrete: invented by the Romans and forgotten for more than a millennium?
This interesting graph taken from the great Dot Earth blog by Andrew C. Revkin in the NY Times indicates that global warming is currently at the bottom of the top-20 list of top priority issues for the American public. Top priority of course is the economy with jobs and terrorism at the number two and three spots. So now that the hype is over, we can concentrate on getting some work done. And the good part is that a large number of issues that are considered higher priority, like energy, jobs, education and environment, are directly connected to reducing global warming. And Obama recognizes this. Now we can only hope he gets the work done!
Indian infrastructure player Punj Llyod and US-based Throium Power, which signed an MoU last month to form a 50:50 joint venture company for exploring commercial nuclear power opportunities, are targeting an investment of up to $1 billion in the venture.
"We are looking at an investment of several million dollars or up to a billion in the coming years, depending on how India's government allows commercialisation of nuclear power sector," Dennis Hays, vice-president of Thorium Power, said on the Indian Business Standard website.
In this time where more and more voices are calling for a return to Nuclear Power this raises the interesting question how much nuclear fuel is available in the world. Clearly the different parties do not agree here. Where the Nuclear Energy Agency announced a year ago that we would have enough resources long into the future, others state that with slightly increased nuclear demand we will run out of the easy to mine uranium within thirty years or so and that then we need to turn to other potentially more dangerous sources.
A Canadian Nuclear Engineer, Dr Jeremy Whitlock, maintains a very interesting website on the subject, where we can find the, in my opinion most realistic, answer that in principle there is a lot of uranium available, but that it fully depends on how much we are willing to pay for it. Moreover, the developments in reactor technology are still going on and the efficiency of nuclear reactors still leaves a lot of room for improvement. Finally, thorium, which is about three times more available than uranium in the form of thorite (see picture), can also be used as fuel. And this possibly explains the Indian joint venture mentioned above, since India has one of the worlds largest thorium reserves. Interesting, but I still do not know where I stand on the subject of nuclear energy...
Via: Engadget
Brick is brick and concrete is ...."Beton"
Concrete in buildings, as demolishing and recycling companies tear down today, is just plain concrete: a renewable material not much changed since the roman times, although the town of Pozzuoli lost its trade to Portland, but what about the concrete used in present days? We all talk about 'sustainability', but what if our children want to break down recently build concrete structures?
"Vliegas" (fly ash) is used as a replacement of Portland cement, as a solidifier and praised for its quality. Do we consider its toxic qualities as well? Demolishing in future days the concrete of today containing vliegas is not sustainable at all: how to extract the toxic vliegas from the concrete?
Todays concrete is often filled with polystyrene. How to separate it from the concrete? Recycling companies did intensive testing, but splitting them on the demolishing site is practically impossible.
These are just a tiny examples of how we dilute our pollution through society instead of making real changes for the better
More information and pictures on Dynamic Architecture
Via: Gizmodo
In Finland mayor biogass plant projects are put on hold because of a simple calculation: how many miles can a lumber truck drive to a plant and stil give the plant the oportunity to make a positive Co2 output result. Not very many miles as you can imagine....
In Holland the calculator apparently works different: we import wood from Austria, Italy and even from Australia (six!!! weeks in a ship to start with) to burn in electricity plants and still can sell the output as being 'duurzaam'. One of the bigger energy distributors uses around 700.000 metric tons of wood a year to mingle with household and burnable industrial waist and there are four or five big players who do the same....





















