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Nagmani

Monday, August 8, 2016

Global Energy Technology Summits 2016: Innovate 5R .....The Path to Power


NTPC going to organize third Green Energy Technology Summit 2016 in  November, 2015. In 2014 and 2015 it was a grand success. It opened up an opportunity for knowledge sharing by the technology leaders in the field of Power Generation around the world to share their state of art technologies to power professionals worldwide.  GETS 2016 shall have keynote speeches and presentations by eminent industry leaders, debate sessions, plenary sessions, technical theme sessions, and Exhibition stalls. The summit has been designed with theme‐based presentations on a Innovate 5R...the path to power. Authors are invited to present technical papers in various Technical Sessions...

Thursday, December 3, 2015

World’s richest 10% is responsible for half our global fossil fuel emissions

As world leaders from 195 nations gather in Paris to come up with solutions to the current climate crisis, a new report has outlined who’s responsible for what percentage of the world’s global carbon emissions. 
And while the results are shocking, it’s not exactly a newsflash that the world’s richest are trashing the joint while the world’s poorest are barely making an impact.
Published by British charity Oxfam, the report concludes that the richest 10 percent of the world’s population is producing 49 percent of our total carbon emissions, while the poorest 50 percent is contributing just 10 percent. 
The data also show that in the richest 1 percent, the average person is emitting 175 times more carbon that the average person in the bottom 10 percent. And the total emissions produced by China's poorest 600 million people add up to just one-third of the total emissions from the richest 10 percent in the US - a group that numbers just 30 million people, by comparison.
"Rich, high emitters should be held accountable for their emissions, no matter where they live," Oxfam climate policy head, Tim Gore, told the press. "But it’s easy to forget that rapidly developing economies are also home to the majority of the world’s very poorest people and while they have to do their fair share, it is rich countries that should still lead the way."
carbon-per
Credit: Oxfam
While the numbers are extremely telling, and do well to expel myths that highly populous developing countries are the world’s biggest carbon emitter, some have criticised these kinds of comparisons as being pointless. 
When it comes to human-caused climate change, pointing fingers to say who’s accountable for what has been an understandably controversial issue, and the AFP mentions that the world’s richest and poorest countries remain "deeply divided" on how to divvy up the responsibility for curbing carbon emissions. 
"Developing countries say the West has polluted for much longer and should shoulder a bigger obligation for cutting back," the news agency reports. "They also demand assurances of finance to help them shift to less-polluting renewable energy, shore up defences against climate impacts such as sea level rise, droughts and superstorms, and to cover damage that cannot be avoided."
“It’s not just a question of historical responsibility - they also have the most room to make the cuts and make the strongest impact," Indian prime minister, Narendra Modi, said of the world’s richest nations at the UN climate change summit in Paris on Monday. 
Regardless of who’s more to blame about the situation we’ve found ourselves in as a global community, it’s not yet clear how we’re going to get ourselves out it.As Katie Nguyen at Reuters reports, recent pledges made by 184 countries to curb greenhouse gas emissions beyond 2020 "are too weak to limit the rise in global temperatures to 2 degrees Celsius (3.6 Fahrenheit) above pre-industrial times”. 
And that’s a problem, because if we can’t stop that 2-degree increase, we’re ensuring a pretty catastrophic future for ourselves and our children. 

Thursday, September 3, 2015

NTPC organizing Global Energy Technology summit (GETS-2015)

NTPC going to organize second Green Energy Technology Summit 2015 in  November, 2015. In 2014, it was a grand success. It opened up an opportunity for knowledge sharing by the technology leaders in the field of Power Generation around the world to share their state of art technologies to power professionals worldwide. 

GETS 2015 shall have keynote speeches and presentations by eminent industry leaders, debate sessions, plenary sessions, technical theme sessions, and Exhibition stalls. The summit has been designed with theme‐based presentations on a Greener and Cleaner power generation. Authors are invited to present technical papers in various Technical Sessions designed for the Summit.

For more information Click here

Source : NTPC, GETS-2014, GETS 2015

Tuesday, July 28, 2015

Characterization and performance study on visible active TiO2 polymorphs for solar application

The photocatalytic is a reaction which uses light to activate substances which modify the rate of chemical reaction without involving in the reaction. The photocatalytic activity is a result of the synergy of a succession of phenomena- photogeneration, separation, and participation of the charge carriers at the catalyst surface for chemical reaction. Synergistic effect of the mixed phase titania on its performance compared to the pristine phase has been investigated. 

The experiments were conducted under visible light irradiations. The characterization was done using tools X-ray diffraction (XRD) and Scanning electron microscope (SEM). 



For photocatalytic degradation test methylene blue was used as probe pollutant and it was tested under visible light. The results show that the mixed phase catalysts showed 1.6 times more activity than anatase phase of TiO2 and 7.6 times than rutile phase of TiO2. Thus the fundamental charge transfer process at different phases is important for light harvesting photocatalyst.

Gas Sensing Studies of Multifunctional Metal Oxide: Undoped/doped TiO2 Nanomaterial and Thin Films

At Bhabha Atomic Research Centre, Sensing studies were carried out at room temperature, 100°C, 150°C, 200°C and 300°C. Sensing response at150°C is over 200% at 10 ppm which is encouraging from application point of view. Fabrication of a sensor array based on TiO2 and doped- TiO2 thin films was demonstrated. TiO2 thin films were deposited on LaAl2O3 substrates by pulse laser deposition. The as-grown films were characterized by XRD. The sensor array based on TiO2 thin film can be used for identifying H2S gas both qualitatively and quantitatively by a proper control over the process parameters, namely: operating temperature and surface modifications. The maximum sensor response (S=204) at optimal temperature (150°C) was obtained for pure TiO2 epitaxial thin film . A concentration profile at 150°C was recorded for generation of data bank.
The Nb-doping in TiO2 improves the conductivity of TiO2, mainly in high temperature range where the material is mostly sensitive to gaseous species.

Further from the present work it is clear that TiO2 thin films can be operated as a H2S sensor in ppm level in the range of 1- 50 ppm. The sensor based on TiO2 found to be faster response and recovery time.
It is well established that sensor response and selectivity of metal-oxide sensors can be improved by using different strategies, such as, doping with penta-valent or tri-valent material and making composites of metal-oxides. In particular, for ppm level H2S detection it has been demonstrated that selectivity can be greatly enhanced if the sensing element consists of random p-n junctions. single chemiresistive sensor is usually tailored to detect a single gas.


By: Nagmani

Monday, July 6, 2015

CENTRAL UNIVERSITY OF JHARKHAND ADMISSION RESULTS - 2015




Admission to all the courses offered by Central University of Jharkhand, for the academic session beginning from July 2015,
is being done through the Central Universities Common Entrance Test (CUCET) - 2015.
Applicants are advised to regularly visit the website of CUCET-2015 (www.cucet2015.co.in), as well as the below mentioned link/s for latest updates :-

ADMISSIONS RESULTS

Merit list for UG/ Integrated Courses

Merit list for B.Ed Courses

Merit list for Post Graduate Courses

For more information CLICK HERE

Source : www.cuj.ac.in

Thursday, October 16, 2014

This new nuclear reactor could bring carbon-free power to 80,000 homes, and fit in the back of a truck

American aerospace and technology company Lockheed Martin has announced that they’re working on a new nuclear fusion reactor that’s 10 times smaller than any other reactor on the market. Their 100-megawatt reactor measures just 3 metres by 3 metres, which makes it compact enough to fit in the back of a truck.
Called a compact fusion reactor (CFR), researchers at Lockheed Martin say this small device will be able to power warships, spaceships, aeroplanes, and even a city filled with 80,000 homes. This means no more reliance on fossil fuels, which is significant, because according to Andrea Shalal at Reuters, it's been predicted that there will be a 40 to 50 percent increase in energy use over the next generation.
"Crucially, by being 'compact', Lockheed believes its scalable concept will also be small and practical enough for applications ranging from interplanetary spacecraft and commercial ships to city power stations," says Guy Norris at Aviation Week. "It may even revive the concept of large, nuclear-powered aircraft that virtually never require refueling - ideas of which were largely abandoned more than 50 years ago because of the dangers and complexities involved with nuclear fission reactors."
Lockheed Martin is also building this new energy source to be much safer and more efficient than current nuclear reactors, and more environmentally friendly. It runs on just 25 kg of deuterium-tritium fuel per year, which can generate nearly 10 million times more energy than the same amount of fossil fuels. 
The key to the success of this system is a new design that allows it to hold way more plasma than current systems. Tom McGuire, who is heading up the project, told Aviation Week that current nuclear reactors only have a plasma ratio of about 5 percent, and they have to be enormous just to achieve this much. The CFR, on the other hand, is predicted to increase this ratio to at least 100 percent.
The team says they’ve tested the system out in the lab already, and they’ll have a prototype up and running within five years. They predict their reactors will be operational and on the market in 10 years. 
It might sound too good to be true, and these things often are, but the fact that Lockheed Martin is one of the biggest aerospace and military companies in the world makes this a promising announcement. But not everyone is impressed. Thermonuclear plasma physicist at the University of Texas, Swadesh M. Mahajan, told James West at Mother Jones, “we know of no materials that would be able to handle anywhere near that amount of heat,” for a device as small the CFR.
And Tom Jarboe, professor of aeronautics and astronautics at the University of Washington, told Jessica Orwig at Business Insider“The nuclear engineering clearly fails to be cost effective."
We'll just have to wait and see...

Tuesday, October 14, 2014

Ultra-fast charging batteries that can be 70% recharged in just two minutes

October 13, 2014
Scientists have developed a new battery that can be recharged up to 70 per cent in only 2 minutes. The battery will also have a longer lifespan of over 20 years. Expected to be the next big thing in battery technology, this breakthrough has a wide-ranging impact on many industries, especially for electric vehicles which are currently inhibited by long recharge times of over 4 hours and the limited lifespan of batteries.
This next generation of lithium-ion batteries will enable electric vehicles to charge 20 times faster than the current technology. With it, electric vehicles will also be able to do away with frequent battery replacements. The new battery will be able to endure more than 10,000 charging cycles -- 20 times more than the current 500 cycles of today's batteries.
NTU Singapore's scientists replaced the traditional graphite used for the anode (negative pole) in lithium-ion batteries with a new gel material made from titanium dioxide, an abundant, cheap and safe material found in soil. It is commonly used as a food additive or in sunscreen lotions to absorb harmful ultraviolet rays.
Naturally found in a spherical shape, NTU Singapore developed a simple method to turn titanium dioxide particles into tiny nanotubes that are a thousand times thinner than the diameter of a human hair.
This nanostructure is what helps to speeds up the chemical reactions taking place in the new battery, allowing for superfast charging.
Invented by Associate Professor Chen Xiaodong from the School of Materials Science and Engineering at NTU Singapore, the science behind the formation of the new titanium dioxide gel was published in the latest issue of Advanced Materials, a leading international scientific journal in materials science.
NTU professor Rachid Yazami, who was the co-inventor of the lithium-graphite anode 34 years ago that is used in most lithium-ion batteries today, said Prof Chen's invention is the next big leap in battery technology.
"While the cost of lithium-ion batteries has been significantly reduced and its performance improved since Sony commercialised it in 1991, the market is fast expanding towards new applications in electric mobility and energy storage," said Prof Yazami.
"There is still room for improvement and one such key area is the power density -- how much power can be stored in a certain amount of space -- which directly relates to the fast charge ability. Ideally, the charge time for batteries in electric vehicles should be less than 15 minutes, which Prof Chen's nanostructured anode has proven to do."
Prof Yazami, who is Prof Chen's colleague at NTU Singapore, is not part of this research project and is currently developing new types of batteries for electric vehicle applications at the Energy Research Institute at NTU (ERI@N).
Commercialisation of technology
Moving forward, Prof Chen's research team will be applying for a Proof-of-Concept grant to build a large-scale battery prototype. The patented technology has already attracted interest from the industry.
The technology is currently being licensed to a company and Prof Chen expects that the new generation of fast-charging batteries will hit the market in two years' time. It holds a lot of potential in overcoming the longstanding power issues related to electro-mobility.
"With our nanotechnology, electric cars would be able to increase their range dramatically with just five minutes of charging, which is on par with the time needed to pump petrol for current cars," added Prof Chen.
"Equally important, we can now drastically cut down the waste generated by disposed batteries, since our batteries last ten times longer than the current generation of lithium-ion batteries."
The long-life of the new battery also means drivers save on the cost of a battery replacement, which could cost over USD$5,000 each.
Easy to manufacture
According to Frost & Sullivan, a leading growth-consulting firm, the global market of rechargeable lithium-ion batteries is projected to be worth US$23.4 billion in 2016.
Lithium-ion batteries usually use additives to bind the electrodes to the anode, which affects the speed in which electrons and ions can transfer in and out of the batteries.
However, Prof Chen's new cross-linked titanium dioxide nanotube-based electrodes eliminate the need for these additives and can pack more energy into the same amount of space.
"Manufacturing this new nanotube gel is very easy," Prof Chen added. "Titanium dioxide and sodium hydroxide are mixed together and stirred under a certain temperature. Battery manufacturers will find it easy to integrate our new gel into their current production processes."
This battery research project took the team of four NTU Singapore scientists three years to complete and is funded by Singapore's National Research Foundation.
Last year, Prof Yazami was awarded the Draper Prize by the National Academy of Engineering for his ground-breaking work in developing the lithium-ion battery with three other scientists.


Nanoparticles can act like liquid on the outside, crystal on the inside

October 12, 2014
A surprising phenomenon has been found in metal nanoparticles: They appear, from the outside, to be liquid droplets, wobbling and readily changing shape, while their interiors retain a perfectly stable crystal configuration.

The research team behind the finding, led by MIT professor Ju Li, says the work could have important implications for the design of components in nanotechnology, such as metal contacts for molecular electronic circuits.
The results, published in the journal Nature Materials, come from a combination of laboratory analysis and computer modeling, by an international team that included researchers in China, Japan, and Pittsburgh, as well as at MIT.
The experiments were conducted at room temperature, with particles of pure silver less than 10 nanometers across -- less than one-thousandth of the width of a human hair. But the results should apply to many different metals, says Li, senior author of the paper and the BEA Professor of Nuclear Science and Engineering.