IIT scientists use waste onion skin to generate electricity

Agencies
December 18, 2017

New Delhi, Dec 18: Scientists at IIT Kharagpur have used waste onion skins to develop an inexpensive device that can generate 'green' electricity from body movements and may power pacemakers, smart pills and wearable electronics.

The non-toxic, biodegradable and biocompatible device takes advantage of the suitable piezoelectric properties of the onion skin, researchers said.

Piezoelectric materials have the ability to convert energy from everyday mechanical motions into electricity.

"This homespun inexpensive innovative finding can be a breakthrough scientific research in a new direction; even common people can generate energy in any circumstances using this simple novel cost-effective idea," Bhanu Bhusan Khatua, a professor at Indian Institute of Technology (IIT) Kharagpur in West Bengal said.

Increasing population, industrialisation, and ubiquitous use of electronics and vehicles are playing a huge role in destroying the environment day by day.

The rising burden on fossil fuels and depletion of natural resources has made the development of sustainable and alternative green energy technologies a pressing requirement in current energy deficiency world, researchers said.

Piezoelectric materials can be used to convert simple body movements into green energy without adding any pollution to our environments.

However, piezoelectric nanogenerators are difficult to synthesise and are often very expensive. They are also usually highly toxic or pose environmental hazards, which means their use in real life application remains limited.

These drawbacks prompted researchers at IIT Kharagpur and Pohang University of Science and Technology in South Korea to develop a non-toxic, biodegradable and biocompatible piezoelectric nanogenerator (BPNG).

Among various cellulose containing bio-materials, onion skin is the most abundant bio-waste, said Khatua.

"This motivated us to study the piezoelectric coefficient of the onion skin and its suitability as a bio- piezoelectric material," Khatua said.

"The uniqueness of our work lies in the novelty of utilising naturally abundant biocompatible and biodegradable onion skin directly as efficient piezoelectric material, which is thrown as tonne-scale garbage in every day worldwide," he said.

The device could be used in various biomedical applications such as pacemakers powered by heartbeats or edible devices that can track health from inside the body.

Researchers estimate that the device could be manufactured easily at a cost of less than a rupee, with existing technologies. This would make the system accessible to people the economically weaker sections of the society.

To build the device, the researchers coated an onion skin with a thin layer of gold and added copper wires with silver paste. It was then encapsulated in polymers.

The nanogenerator is capable of harvesting several types of mechanical energies, including body movements, wind flow and even machine vibrations.

The device developed by researchers has an output of 18 volts and can turn on 30 green LEDs under repeated human finger touch response, according to the study published in the journal NanoEnergy.

The device could withstand repeated cycles of pressing and releasing for up to five months. The voltage generated remained almost unchanged even after long cycles, indicating good mechanical stability of the device for bio-medical applications, researchers said.

"We also studied the durability of the device under sewing machine vibration for 10,000 cycles. From the result it can easily be said that the device had enough mechanical durability and chemical stability for realistic applications," Khatua said.

The researchers, including Sumanta Kumar Karan and Sandip Maiti from IIT, are optimistic about commercialising the technology soon, although more research is required before it can be realised in practical applications.

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News Network
March 19,2020

New Delhi, Mar 19: Hit hard by coronavirus, budget carrier IndiGo today announced that it will cut salaries of senior employees. IndiGo CEO Ronojoy Dutta, who will himself take a 25% cut in salary, said senior vice presidents and above are taking a 20% pay cut while vice presidents and cockpit crew are taking a 15% pay cut.

With precipitous drop in revenues, the very survival of airline industry is now at stake, Dutta said while announcing the pay cut. "We have to pay careful attention to our cash flow so that we do not run out of cash," Dutta said adding that he knew how hard it was for families to take a cut in "take-home pay".

"With a great deal of reluctance and a deep sense of regret, we are therefore instituting pay cuts for all employees, excluding Bands A and B, starting April 1, 2020," the chief executive officer said. Band A and B are the lowest brackets in salary class, where most of the employees are.

IndiGo's flight operations chief Ashim Mitra had written an email to pilots this morning saying that the economic environment has deteriorated significantly and no airline is insulated from this severe downturn.

"It has become a necessity to initiate some tough calls and we are working on a string of measures that will be shared and implemented over the next few days and weeks," Mitra said.

With countries sealing their borders partially or fully across the world due to the novel coronavirus pandemic, aviation sector has been hit extremely hard as most airlines globally have drastically curtailed their flight operations.

Another budget airline GoAir has already terminated contracts of expat pilots amid curtailed operations due to the coronavirus pandemic.

Citing "unprecedented" decline in air travel, the budget carrier announced it was suspending international operations and offering leave without pay programme to its staff on a rotational basis.

Government-owned Air India may also cut salary of employees by 5% amid its growing financial woes particularly in the wake of the coronavirus pandemic, which has nearly grounded its entire international operations. The reduction will be across the board, according to a PTI report.

The loss-making airline, which is in the process of a second attempt of privatization after failing to get a single buyer nearly two years ago, has already taken some steps such as reduced flying allowances to cabin crew besides withdrawing entertainment allowance to executive pilots, among others.

“Air India is considering a 5 per cent pay cut to its employees as it faces huge financial crisis due to the ongoing coronavirus outbreak, which has brought almost its entire international operations save the US, Canada and a few other markets, to the ground," a source told news agency.

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News Network
May 5,2020

Dubai, May 5: Tickets on repatriation flights from UAE to India, which start on May 7, could be costlier than regular airfare, and adding to the financial woes of those flying back. Nearly 200,000 Indians in the UAE have registered on the website seeking to return home.

“A one-way repatriation ticket to Delhi will cost approximately Dh1,400-Dh1,650 - this would earlier have cost between Dh600-Dh700 [during these months],” said Jamal Abdulnazar, CEO of Cozmo Travel. “A one-way repatriation flight ticket to Kerala would cost approximately Dh1,900-Dh2,300.”

This can be quite a burden, as a majority of those taking these flights have either lost their jobs or are sending back their families because of uncertainty on the work front. To now have to pay airfare that is nearly on par with those during peak summer months is quite a blow.

Sources said that officials in Indian diplomatic missions have already initiated calls to some expats, telling them about likely ticket fares and enquiring about their willingness to travel.

Although many believed repatriation would be government-sponsored, Indian authorities have clarified that customers would have to pay for the tickets themselves. Those who thought they were entitled to free repatriation might back out of travel plans for now.

Fact of life

But aviation and travel industry sources say higher rates cannot be escaped since social distancing norms have to be strictly enforced at all times. That would limit the number of passengers on each of these flights.

“One airline can carry only limited passengers - therefore, multiple airlines are likely to get the approval to operate repatriation flights,” said Abdulnazar. “Also, airports will have to maintain safe distance for passengers to queue up at immigration and security counters.

“Therefore, it is recommended that multiple carriers fly into multiple Indian airports for repatriation to be expedited.”

The Indian authorities, so far, have not taken the easy decision to get its private domestic airlines into the rescue act. Gulf News tried speaking to the leading players, but they declined to provide any official statements. So far, only Air India, the national airline, has been commissioned to operate the flights.

Air India finds itself in the driver's seat when it comes to operating India's repatriation flights. To date, there is no confirmation India's private airlines will be allowed to join in.

UAE carriers ready to help out

UAE’s Emirates airline, Etihad, flydubai and Air Arabia are likely to also operate repatriation flights to India after Air India implements the first phase of services.

“We are fully supporting governments and authorities across the flydubai network with their repatriation efforts, helping them to make arrangements for their citizens to return home,” said a flydubai spokesperson.

“We will announce repatriation flights as and when they are confirmed, recognising this is an evolving situation whilst the flight restrictions remain in place.”

An AirArabia spokesperson said the airline is ready to operate repatriation flights when the government tells them to.

Travel agencies likely to benefit

Apart from operating non-scheduled commercial flights, the Indian government is also deploying naval ships to bring expat Indians back. Sources claim the ships are to ferry passengers who cannot afford the repatriation airfares.

Even then, considering the sheer numbers who will want to get on the flights, travel agencies are likely to see a surge in bookings since airline websites alone may not cope with the demand set off in such a short span.

Learn from Gulf governments

In instances when they carried out their own repatriation flights, some GCC governments paid the ticket fares to fly in their citizens. Those citizens who did not have the ready funds could approach their diplomatic mission and aid would be given on a case-to-case basis.

Should Indians wait for normal services to resume?

Industry sources say that those Indians wanting to fly back and cannot afford the repatriation flights should wait for full services to resume once the COVID-19 pandemic settles.

But can those who lost their jobs or seen steep salary cuts stay on without adding to their costs? And is there any guarantee that when flight services resume, ticket rates would be lower than on the repatriation trips.

As such, normal travel is expected to pick up only after the repatriation exercise to several countries is completed. UAE-based travel agencies are not seeing any bookings for summer, which is traditionally the peak holiday season.

“Majority want to stay put unless full confidence is restored,” said Abdulnazar. “I expect full normalcy to be restored not until March 2021.

“People have also taken a hit to their income. Without disposable income, you will curtail your travel.”

What constitutes normalcy?

Airfares are expected to remain high, given the need to keep the middle seats empty to practise safe distance onboard.

“We expect holiday travel to resume by October or November - but, the travel sentiment will not go back to pre-COVID-19 levels anytime soon,” said Manvendra Roy, Vice-President – Commercial at holidayme, an online travel agency. “The need to keep the middle seat vacant will add 30-40 per cent pricing pressure per seat from an airline perspective.

“This will make holidays more expensive.”

As for business travel, it will take some time to recover. Corporate staff are now used to getting work done via conference calls. “Companies will also curtail their travel expenditure since their income has taken a hit,” said Abdulnazar.

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News Network
March 2,2020

Paris, Mar 2: A global agency says the spreading new virus could make the world economy shrink this quarter, for the first time since the international financial crisis more than a decade ago.

The Organization for Economic Cooperation and Development says Monday in a special report on the impact of the virus that the world economy is still expected to grow overall this year and rebound next year.

But it lowered its forecasts for global growth in 2020 by half a percentage point, to 2.4 per cent, and said the figure could go as low as 1.5 per cent if the virus lasts long and spreads widely.

The last time world GDP shrank on a quarter-on-quarter basis was at the end of 2008, during the depths of the financial crisis. On a full-year basis, it last shrank in 2009.

The OECD said China's reduced production is hitting Asia particularly hard but also companies around the world that depend on its goods.

It urged governments to act fast to prevent contagion and restore consumer confidence.

The Paris-based OECD, which advises developed economies on policy, said the impact of this virus is much higher than past outbreaks because "the global economy has become substantially more interconnected, and China plays a far greater role in global output, trade, tourism and commodity markets."

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