Archive for ‘air’

02/05/2020

Number of China-Europe freight trains hits monthly record

BEIJING, May 2 (Xinhua) — The number of China-Europe freight trains hit a record monthly high of 979 in April, up 46 percent year on year, the China State Railway Group said Saturday.

A total of 88,000 TEUs (20-foot equivalent units) of cargo were transported by the trains, up 50 percent from a year earlier.

From January to April, a total of 2,920 China-Europe freight trains transported cargo of 262,000 TEUs, up 24 percent and 27 percent from a year earlier, respectively.

The number of departing trains rose 36 percent year on year to 1,638 during the first four months, while the number of returning trains climbed 11 percent to 1,282.

China-Europe cargo train services have become an important logistics channel to ensure smooth trade as air, sea and road transportation have been severely affected by the novel coronavirus epidemic, the company said.

The freight trains have also been playing a crucial role in helping with the fight against the pandemic in Europe as massive quantities of medical supplies were sent by them.

From March 21 to the end of April, anti-epidemic supplies totaling 660,000 items and weighing 3,142 tonnes were sent by the freight trains to European countries such as Italy, Germany, Spain and the Czech Republic.

Source: Xinhua

26/04/2020

Wuhan declared free of Covid-19 as last patients leave hospital after months-long struggle against coronavirus

  • City at centre of outbreak finally able to declare itself clear of disease after months in lockdown and thousands of deaths
  • Risk of infection remains, however, with some patients testing positive for coronavirus that causes disease without showing symptoms
Ferries and other public transport services resumed in Wuhan last week. Photo: Xinhua
Ferries and other public transport services resumed in Wuhan last week. Photo: Xinhua

The city of Wuhan, the initial epicentre of the coronavirus pandemic, no longer has any Covid-19 patients in hospital after the last 12 were discharged on Sunday.

Their release ended a four-month nightmare for the city, where the disease was first detected in December. The number of patients being treated for Covid-19, the disease caused by a new coronavirus, peaked on February 18 at 38,020 – nearly 10,000 of whom were in severe or critical condition.

“With the joint efforts of Wuhan and the national medical aid given to Hubei province, all cases of Covid-19 in Wuhan were cleared as of April 26,” Mi Feng, a spokesman for the National Health Commission said on Sunday afternoon.

The announcement came only one day after the city discharged the last patient who had been in a severe condition. That patient also was the last severe case in Hubei province.

The last patient discharged from Wuhan Chest Hospital, a 77-year-old man surnamed Ding, twice tested negative for Sars-CoV-2, the virus that causes Covid-19, and was released at noon on Sunday.

“I missed my family so much!” Ding told Changjing Daily.

Another unidentified patient exclaimed as he left the hospital: “The air outside is so fresh! The weather is so good today!”

Wuhan faced a long journey to bring its patient count down to zero.

The city of 11 million, the capital of Hubei province and a transport hub for central China, was put under a strict lockdown on January 23 that barred anyone from entering or exiting the city without official approval for 76 days until it was officially lifted on April 8.

Coronavirus: Wuhan, Los Angeles officials discuss getting back to work after lockdown

22 Apr 2020

Residents were ordered to stay in their apartments as the city stopped public transport and banned private cars from city streets. As the epidemic worsened, more than 42,000 medical staff from across the country were sent to the city and to Hubei province to help ease the burden on the local health care system.

Wuhan was the hardest hit city in China, accounting for 50,333 of the 82,827 locally transmitted Covid-19 cases recorded in China. More than 4,600 died in the country from the disease.

On March 13, the city reported for the first time that there were no new suspected cases of the infection, and five days later there were no confirmed cases.

The number of discharged patients bottomed out at 39.1 per cent at the end of February, gradually climbing to 92.2 per cent by last Thursday.

“Having the patients in the hospital cleared on April 26 marks a major achievement for the city’s Covid-19 treatment,” the Wuhan Health Commission said in a statement.

However, having no severe cases in hospital does not mean all the discharged patients will require no further treatment as they may still need further care.

“Clearing all the severe cases marks a decisive victory for the battle to safeguard Wuhan,” health minister Ma Xiaowei told state broadcaster China Central Television on Saturday.

“Some patients who have other conditions are being treated in specialised hospitals. It has been properly arranged.”

Coronavirus: Chinese writer hit by nationalist backlash over diary about Wuhan lockdown

18 Apr 2020

Ten patients aged between 42 and 85 who have been declared coronavirus-free are still in intensive care at the city’s Tongji Hospital where they are being treated for kidney problems and other complications arising from Covid-19. Some still need ventilators to help them breathe.

These 10 patients are under 24-hour care, with 190 nurses on four-hour rotations. There are other patients in a similar condition in two other hospitals in Wuhan, according to the Hubei Broadcasting and Television Network.

However, the discharge of the last batch of Covid-19 patients does not mean that the risk of infection is gone.

The city reported 20 new cases of people testing positive for Sars-CoV-2, the official name for the coronavirus that causes the disease, but who do not yet show symptoms.

There are 535 such carriers under medical observation. Past data shows some of these asymptomatic carriers will develop symptoms, and so will be counted as Covid-19 patients under China’s diagnosis and treatment plan.

China’s coronavirus infection curve has flattened out with about 694 imported cases of Covid-19 on top of about 800 locally transmitted ones now under treatment.

The national health commission spokesman warned that people still need to be on high alert as the virus is continuing to spread around the globe, with no sign yet of a slowdown.

“[We] must not drop our guard and loosen up. [We] must discover cases in time and deal with them quickly,” Mi said, citing the continued pressure from cases imported by people returning from overseas.

“The next step will be to implement the requirements of the central government and continue to guard against imported cases and a rebound of domestic transmitted cases.”

Source: SCMP

23/04/2020

China Focus: China-Europe freight trains help stabilize global supply chain

SHENYANG, April 23 (Xinhua) — With trucks standing bumper to bumper and large cranes loading containers on the train, work returned to normal at a logistics base in northeast China’s Liaoning Province.

The base, where the China-Europe freight trains are set to depart in Shenyang, the provincial capital, has seen stable departures since early April as the novel coronavirus epidemic ebbs away.

With the global supply chain being affected by restrictions in air, land, and port travel due to the global pandemic, China-Europe railway has been playing a more important role, experts say.

“The train was operated by staff in different sections, which means it does not require cross-border personnel health inspections, giving it advantages during the pandemic,” said Shan Jing, an industry insider who wrote a book on China-Europe freight trains.

In March, a total of 809 China-Europe freight trains carrying 73,000 containers were sent across China. Both numbers hit a monthly record.

At the Shenyang logistics base, trains depart to travel through Russia, Belarus, Poland and finally reach Germany in around 18 days. As of April 13, a total of 130 trains carrying 11,200 standard containers had departed from the base.

“The province sends a stable number of five trains each week,” said He Ruofan, a business manager with the Shenyang branch of China Railway Container Transport Corp., Ltd, operator of the trains.

The stable operation has made the route a top choice for many Chinese enterprises, said Yao Xiang, a manager with logistics group Sinotrans’s northeast company.

“Many shipping routes have been canceled, and the rest are more and more expensive amid the epidemic,” said Yao, noting the price for air cargo surged 5 to 10 times the normal price as flights decreased from China to Europe.

With increasing departing trains, returning trains on the route have also been increasing, Yao said.

Among the 130 trains that have been sent from the Shenyang base so far this year, 33 returned, carrying construction materials, car parts, mechanical equipment, and daily products.

“These goods provide supplies to large companies like BMW and Michelin’s Shenyang factories,” Yao said.

Medical supplies have also been sent to hard-hit Europe to fight against the coronavirus pandemic.

As of April 18, a total of 448,000 pieces of medical supplies weighing 1,440 tonnes had been sent to European countries via the route, according to China State Railway Group Company, Ltd.

“China-Europe freight trains have shown great service capabilities during the epidemic,” said Shan, the industry insider. “It serves as a new choice for European enterprises, and I believe more people will come to realize the importance of the route.”

Source: Xinhua

21/04/2020

India coronavirus: Can the Covid-19 lockdown spark a clean air movement?

Delhi before and after the lockdownImage copyright GETTY IMAGES
Image caption Delhi’s air quality has improved remarkably during the shutdown

When India shut down last month and suspended all transport to contain the spread of coronavirus, the skies over its polluted cities quickly turned an azure blue, and the air, unusually fresh.

As air pollution plummeted to levels unseen in living memory, people shared pictures of spotless skies and even Himalayan peaks from cities where the view had been obscured by fog for decades.

On one social messaging group, a resident of the capital, Delhi, which regularly records some of the foulest air in the world, celebrated the city’s “alpine weather“. Politician and author Shashi Tharoor wrote that the “blissful sight of blue skies and the joy of breathing clean air provides just the contrast to illustrate what we are doing to ourselves the rest of the time”.

Media caption India coronavirus lockdown cleans up Ganges river

Less than six months ago, Delhi was gasping for breath. Authorities said air quality had reached “unbearable levels”. Schools were shut, flights were diverted, and people were asked to wear masks, avoid polluted areas and keep doors and windows closed.

Delhi and 13 other Indian cities feature on a list of the world’s 20 most polluted. It is estimated that more than a million Indians die every year because of air pollution-related diseases. Industrial smoke, vehicular emissions, burning of trash and crop residue, and construction and road dust are the major contributors.

As urban Indians gazed at the skies and breathed clean air inside their homes, researchers hunkered down to track data on how the grinding lockdown – now extended to 3 May – was impacting air pollution across the country.

LucknowImage copyright GETTY IMAGES
Image caption Lucknow is another city on the top 20 world’s most polluted list

“This was an unprecedented opportunity for us to take a close look at how air pollution levels have responded to an extraordinary development,” Sarath Guttikunda, who heads Urban Emissions, an independent research group that provides air quality forecasts, told me.

Federal pollution control authorities quickly reported a marked improvement in air quality levels in 85 cities.

Dr Guttikunda and his team of researchers looked at the data spewed out by the 100-odd air quality monitoring stations all over India. They decided to concentrate on the capital Delhi and its suburbs – a massive sprawl called the National Capital region, where more than 20 million people live. Last winter, air pollution here had reached more than 20 times the World Health Organization’s safe limit.

Mumbai before and after the lockdownImage copyright HINDUSTAN TIMES
Image caption The financial capital Mumbai also seems very different

The deadliest particle in Delhi’s foul air is the tiny but deadly PM 2.5, which increases the likelihood of respiratory and cardiovascular diseases. They primarily come from combustion – fires, automobiles and power plants.

Urban Emissions found the levels of PM 2.5 in Delhi during the lockdown plummeted to 20 micrograms per cubic metre with a 20-day average of 35.

To put this into context, between 2017 and 2019, the monthly average of PM 2.5 in the capital was up to four times higher. (The national standard is set at 40, and the WHO has an annual average guideline of just 10 micrograms per cubic metre.)

“If 35 is the average lowest available PM2.5 with limited local emissions, it means that at least 70% of the pollution is locally generated,” Mr Guttikunda told me.

Media caption India coronavirus lockdown cleans up Ganges river

His study also found a marked dip in PM 10, caused mainly by road and construction dust, and nitrogen dioxide, which comes mainly from vehicular emissions, and nearly 90% of vehicles are off the road.

“The current crisis has shown us that clear skies and breathable air can be achieved very fast if concrete action is taken to reduce burning of fossil fuels,” says Sunil Dahiya, of the Centre for Research on Energy and Clean Air, which has also been tracking air pollution levels during the lockdown.

But will this prompt change? After all, urban Indians’ and the media’s panic and outrage during the deadly winter pollution every year soon gets lost in the fog of summer heat and concerns over monsoon rains and droughts.

“We don’t yet have a democratic demand for clean air,” Arunabha Ghosh, Chief Executive Officer of the Council on Energy, Environment and Water, a leading climate think tank, told me. Orders to clean up the air have almost always come from the courts, responding to pleas by NGOs.

Delhi pollutionImage copyright GETTY IMAGES
Image caption Pollution in Delhi peaks during winter

However, Dr Ghosh still hopes that “the experience of blue skies and fresh air could be a trigger to create a democratic demand for clean air in India”.

Crises often trigger life changing reforms. A fatal four-day “pea-souper” that engulfed London in 1952 and killed thousands provoked the passing of the Clean Air Act to reduce the use of smoky fuels.

China tried to clean up its air several times before hosting marquee international events – like the Beijing Olympics in 2008, the World Expo in Shanghai and the Guangzhou Asian Games in 2010 – before sliding back to grey, smoky skies.

But many believe the 2014 Apec meeting in Beijing, when China hosted 21 heads of Asia-Pacific economies, was a turning point. The rare blue skies over Beijing spawned the phrase ‘Apec blue‘. In a rush to clean its air, China introduced a set of far-reaching measures. Over the next four years, this resulted in a 32% drop in average pollution across major Chinese cities.

So could a lockdown to prevent the spread of a pandemic, which has imperilled the health and livelihoods of millions, trigger similar policy changes to clean up India’s air?

pollution campaignImage copyright GETTY IMAGES
Image caption The movement for clean air has been sporadic and mainly pushed by NGOs

Could it move to a shift in reducing traffic on the road by asking people to work from home in shifts now that millions have experienced clean air for the first time in years? (Facing energy shortages after the loss of the Fukushima nuclear power plant, Japan unleashed a Cool Biz campaign to cut down air conditioning in workplaces and reduce carbon emissions by asking office workers to shed their suits.)

Or can India use some of the money from an inevitable stimulus to help kick-start the economy go towards helping green industries? Renewables, experts say, creates more jobs than coal: India has already created nearly 100,000 jobs in solar and wind energy firms.

Can the country use the windfall revenues accruing from the steep decline in oil prices – most of India’s oil is imported – to provide rebates to polluting factories to set up much-needed emission control equipment?

“We have to learn lessons to deploy the economic recovery from the pandemic. We need growth, jobs and sustainable development,” says Dr Ghosh. Cleaning up the air could be the key. For too long, India – and Indians – have ignored their right to breathe easy.

What’s more, if China can reduce air pollution by 32% in four-and-a-half years, why can’t India pledge to reduce pollution by 80% in 80 cities by 2027, which is our 80th anniversary of Independence? asks Dr Ghosh.

It’s a good question.

Source: The BBC

09/04/2020

Coronavirus: Why India cannot afford to lift its lockdown

India man during lockdownImage copyright GETTY IMAGES
Image caption More than a billion people have been staying at home during the lockdown

Will India extend its rigorous 21-day lockdown to slow the spread of coronavirus beyond its end date next week? By all accounts, yes.

On 24 March, India shut its $2.9 trillion economy, closing its businesses and issuing strict stay-at-home orders to more than a billion people. Air, road and rail transport systems were suspended.

Now, more than two months after the first case of Covid-19 was detected in the country, more than 5,000 people have tested positive and some 150 people have died. As testing has ramped up, the true picture is emerging. The virus is beginning to spread through dense communities and new clusters of infection are being reported every day. Lifting the lockdown could easily risk triggering a fresh wave of infections.

A harsh lockdown is certain to slow down the disease. Virologists I spoke to believe India is still at an early stage of the infection. The country still doesn’t have enough data on the transmissibility of the virus or even how many people could have been infected and recovered to develop adequate herd immunity. (It is slowly beginning finger prick blood tests to look at the presence of protective antibodies.)

More than 250 of India’s 700-odd districts have reported the infection. Reports say at least seven states have a third of all infections, and want the lockdown extended. Six states have reported clusters of rapidly growing infections – from the capital Delhi in the north to Maharashtra in the west and Tamil Nadu in the south.

Economic fallout

Not surprisingly, the lockdown is already hurting the economy. Many of the early hotspots are economic growth engines and contribute heavily in revenues to the exchequer. Mumbai, India’s financial capital and Maharashtra’s main city, accounts for more than a third of overall tax collection. The densely populated city has reported more than 500 cases and 45 deaths, and numbers are steadily rising. Authorities say the infection is now spreading through the community. Mumbai has made wearing face masks mandatory.

Testing in IndiaImage copyright GETTY IMAGES
Image caption India has ramped up testing during the lockdown

Many of these hotspot clusters are also thriving manufacturing bases. The spread of infection means that they will be under lockdown for a longer period of time.

The services industry, which generates almost half of India’s GDP, is also likely to remain shut for some more time. Construction, which employs a bulk of migrant workers, will remain similarly suspended. The unemployment rate may have already climbed to more than 20% after the lockdown, according to a report by the Center for Monitoring Indian Economy.

For the moment, economists say, the government will have to prioritise farming over everything else to ensure the livelihoods of millions and secure the country’s future food supplies.

Half of India’s labour force work on farms. The lockdown happened at a time when a bumper winter crop had to be harvested and sold, and the rain-fed summer crop had to be sowed. The immediate challenge is to harvest and market the first crop, and secure the second.

Moving trucks to pick up produce and take them to markets, with adequate social distancing and hand washing will be something the government will have to move on quickly.

“The immediate challenge is to ensure that rural India is not hit,” says Rathin Ray, an economist. “Realistically, a complete lockdown cannot be continuously maintained beyond early May. We don’t have a choice but to reopen gradually after that.”

Mumbai street signImage copyright GETTY IMAGES
Image caption India has been under a lockdown from 24 March

There is little doubt about that. For his part, SK Sarin, who heads a government advisory panel on combating the disease, says the lockdown can be only eased in a “graded manner in areas that are not hotspots” and that the hotspots remained cordoned off.

Like other affected countries, India will have to prepare itself for what Gabriel Leung, an infectious disease epidemiologist and dean of medicine at the University of Hong Kong, describes as several rounds of “suppress and lift” cycles.

During these periods “restrictions are applied and relaxed, applied again and relaxed again, in ways that can keep the pandemic under control but at an acceptable economic and social cost.”

Also, Dr Leung observes, “how best to do that will vary by country, depending on its means, tolerance for disruption and its people’s collective will. In all cases, however, the challenge essentially is a three-way tug of war between combating the disease, protecting the economy and keeping society at an even keel”.

It is now clear that shutdowns need to continue until transmission has slowed down markedly, and testing and health infrastructure has been scaled up to manage the outbreak.

Experts from the southern state of Kerala, a striking outlier that is containing the infection thanks to a transparent government and a robust public health system, say it isn’t time to lift the lockdown yet and have recommended a three-phase relaxation.

For most countries, easing the lockdown is a tricky policy choice. It sparks fears of triggering a fresh wave of infection and presents the inevitable trade-off between lives and livelihoods. French Prime Minister Edouard Phillipe, says relaxing the lockdown in his country is going to be “fearsomely complex”. In a crisis like this, according to his Dutch counterpart Mark Rutte, leaders have to “make 100% of the decisions with 50% of the knowledge, and bear the consequences.”

MumbaiImage copyright GETTY IMAGES
Image caption India’s financial capital, Mumbai, is emerging as a hotspot

It is going to be tougher for India with its vast size, densely packed population and enfeebled public health system. Also, no country in the world possibly has so much inter-state migration of casual workers, who are the backbone of the services and construction industries.

How will India manage to return these workers to their work places – factories, farms, building sites, shops – without a substantial easing of public transport at a time when crowded trains and buses can be a vector of transmission and easily neutralise the gains of the lockdown? Even allowing restricted mobility – allowing social distancing, temperature checks and passenger hygiene – would put considerable pressure on the public transport system.

The policy choices are fiendishly tough, and the answers are far from easy. India bungled the lockdown by not anticipating the exodus of millions of migrant workers from cities. The weeks ahead will tell whether the fleeing men, women and children carried the infection to their villages. The country simply cannot afford to make similar mistakes again while trying to relax the lockdown. Nitin Pai of The Takshashila Institution, a think tank, believes states should be left to decide on easing restrictions, and decisions “should be based on threat [of infection], which should be determined by extensive testing”.

This week Prime Minister Narendra Modi said that the “situation in the country is akin to a social emergency”. His government now needs make sure that the looming threat to the nation’s health and economic progress is tackled skilfully.

Source: The BBC

01/11/2019

Millions of masks distributed to students in ‘gas chamber’ Delhi

Delhi Chief Minister Arvind Kejriwal distributing masks to studentsImage copyright TWITTER/@ARVINDKEJRIWAL
Image caption Delhi Chief Minister Arvind Kejriwal has been handing out masks to school students

Five million masks are being distributed at schools in India’s capital, Delhi, after pollution made the air so toxic officials were forced to declare a public health emergency.

A Supreme Court mandated panel imposed several restrictions in the city and two neighbouring states, as air quality deteriorated to “severe” levels.

All construction has been halted for a week and fireworks have been banned.

The city’s schools have also been closed until at least next Tuesday.

Delhi’s Chief Minister Arvind Kejriwal said Delhi had been turned into a “gas chamber”.

The masks are being handed out to students and their parents, and Mr Kejriwal has asked people to use them as much as possible.

The levels of tiny particulate matter (known as PM2.5) that enter deep into the lungs are 533 micrograms per cubic metre in the city. The WHO recommends that the PM2.5 levels should not be more than 25 micrograms per cubic metre on average in 24 hours.

As thick white smog blanketed the city, residents started tweeting pictures of their surroundings. Many are furious that the situation remains the same year after year.

The hashtags #DelhiAirQuality and #FightAgainstDelhiPollition are trending on Twitter.

Skip Twitter post by @vishmlondhe
One of the main reasons for air quality in the city worsening every year in November and December is that farmers in the neighbouring states of Punjab and Haryana burn crop stubble to clear their fields. It’s made worse by the fireworks during the Hindu festival of Diwali.

There are other reasons too, including construction dust, factory and vehicular emissions, but farm fires remain the biggest culprit.

Media caption A hair-raising drive through the Delhi smog

More than two million farmers burn 23 million tonnes of crop residue on some 80,000 sq km of farmland in northern India every winter.

The stubble smoke is a lethal cocktail of particulate matter, carbon dioxide, nitrogen dioxide and sulphur dioxide.

Using satellite data, Harvard University researchers estimated that nearly half of Delhi’s air pollution between 2012 and 2016 was due to stubble burning.

The burning is so widespread that it even shows up in satellite photos from Nasa.


What are PM 2.5 particles?

Infographic
  • Particulate matter, or PM, 2.5 is a type of pollution involving fine particles less than 2.5 microns (0.0025mm) in diameter
  • A second type, PM 10, is of coarser particles with a diameter of up to 10 microns
  • Some occur naturally – e.g. from dust storms and forest fires, others from human industrial processes
  • They often consist of fragments that are small enough to reach the lungs or, in the smallest cases, to cross into the bloodstream as well

Source: The BBC

07/10/2019

Chinese celebrate National Day with birthday noodles, films

BEIJING, Oct. 6 (Xinhua) — While fireworks and festivities drew the largest crowds during this year’s National Day holiday, many Chinese chose to celebrate the occasion with a bowl of patriotic noodles and homegrown films.

This year marks the 70th anniversary of the People’s Republic of China which was founded on Oct. 1, 1949. The weeklong National Day holiday, introduced in 1999 by the State Council, or China’s cabinet, saw “National Day noodles” become a popular choice among some Chinese this year.

Birthday noodles are to Chinese people what birthday cakes are to Westerners. In accordance with the Chinese custom, people enjoy a bowl of noodles on their birthday as a symbol of longevity. Many restaurants will prepare a bowl of birthday noodles for free if there is a diner celebrating their birthday.

Beijing Huatian Catering Group, a leading catering company in Beijing that has more than 20 time-honored brands, sold more than 25,000 bowls of National Day noodles and gave away more than 120 bowls of birthday noodles, according to a Saturday report by Beijing Daily.

Beijing Honghua Dahaiwan Catering Group said that it has sold 3,800 bowls of noodles during the first three days of the National Day holiday, up 25 percent compared to the same period of last year.

Moviegoers meanwhile got their fill of National Day celebrations in an entirely different manner.

“My People, My Country,” “The Climbers” and “The Captain” were all set for theatrical release on the Chinese mainland on Sept. 30, a day ahead of the weeklong National Day holiday, according to the China Film Distribution and Exhibition Association.

Featuring seven short stories from seven directors, “My People, My Country” draws on important historical moments since the founding of the PRC, aiming to awaken the shared memories of Chinese around the world.

“The Climbers” dramatizes the real-life expedition of Chinese mountaineers to ascend Mount Qomolangma in 1960 and 1975.

“The Captain” is a cinematic portrayal of a real-life event that occurred on May 14, 2018, when a captain of Sichuan Airlines managed a successful emergency landing after the windshield of his plane broke in the air, safely bringing home the 119 passengers and nine crew members on board.

According to the real-time statistics of MaoYan Movie, the leading online movie ticketing platform in China, the three movies ranked as the top three films at the box office over the holiday. “My People, My Country” has raked in more than 2 billion yuan (around 279.8 million U.S. dollars) as of Sunday, “The Captain,” 1.7 billion yuan, and “The Climbers,” 743 million yuan.

Source: Xinhua

14/08/2019

Chinese engineers follow the Sea Dragon with new submersible that can ‘fly’ through water like a plane in the air

  • Developers say their prototype craft could dive to 1,000 metres in five minutes
  • Liu Kaizhou, who also worked the Jiaolong submersible, says ‘We are in uncharted water’
Professor Liu Kaizhou, who developed the autopilot for China’s manned Jiaolong submersible, says his team has designed a vessel that can move through water like a plane moves through the air. Photo: Xinhua
Professor Liu Kaizhou, who developed the autopilot for China’s manned Jiaolong submersible, says his team has designed a vessel that can move through water like a plane moves through the air. Photo: Xinhua
Chinese engineers say they are developing a radical design for a super-fast robot submersible which the project leader, who worked on the manned deep-sea vessel Jiaolong, or Sea Dragon, claims can “fly” in water like a plane travels through the air.

At 3 metres (9.8ft) long, the prototype consists of a cigar-shaped body, with a guidance system in the bow and a jet plane style rudder and a propeller in the stern.

Outriggers house batteries and two more propellers. These are attached to the body by wing-like planes that the developers said will give the vessel the kind of lift in water that takes an aeroplane into the air and back to the earth.

Developers said the prototype will be capable of 10 knots and could dive to a depth of 1,000 metres (3,281 feet) – or surface from that depth – at about three metres a second, taking about 5½ minutes.

Professor Liu Kaizhou, lead scientist of the project at the Shenyang Institute of Automation, part of the Chinese Academy of Sciences in Liaoning province, said the design had great potential.

If a traditional submarine was like an air balloon, he said, the prototype was like an aircraft. “It is technically flying, fast and freely, like a plane for the water.”

The prototype has 20 major components on board, including a computer, and communications and surveillance equipment. These were all developed and tested by the team, but getting them to work together posed some unexpected challenges, Liu said, meaning the transition to operations in a tough marine environment was some time away.

Underwater station could be a game changer, Chinese scientist says

“We aim to make the first open sea test in about a year,” he said.

The submersible can be powered by conventional batteries or a chemical engine that mixes lithium and sulphur hexafluoride to produce heated steam for electrical generators – an energy source often used by torpedoes.

Funded by the Ministry of Science and Technology from 2017, the project was driven by China’s growing ambition to become a superpower in the world’s oceans.

The team said their submersible had the potential to become the backbone of China’s search-and-rescue operations at sea, naval intelligence gathering, high-precision sea floor mapping, or to transport minerals from the seabed to the surface.

Professor Liu Kaizhou (left) with colleagues Ye Cong and Yang Bo, was instrumental in the success of China’s Jiaolong manned submersible. Photo: Xinhua
Professor Liu Kaizhou (left) with colleagues Ye Cong and Yang Bo, was instrumental in the success of China’s Jiaolong manned submersible. Photo: Xinhua

Professor Du Tezhuan, a researcher in fluid dynamics at the Institute of Mechanics of the Chinese Academy of Sciences in Beijing, said the design was a bold one but it posed the research team many hard questions.

The density of water was much higher than that of air, he said, which meant the vessel would encounter more drag and would need a strong power source.

“Without sufficient speed, the lift will be weak, and to reach high speeds, lots of energy will be needed. Flying in water is not as easy as flying in the air,” said Du, who was not involved in the project.

Why Beijing is speeding up underwater drone tests in the South China Sea

“But in theory it should work. It is worth a try.”

Liu – who led the design of the autopilot system that can take the Jiaolong to depths of more than 7,000 metres (23,000 ft) – said that after tests on the prototype were complete, other innovations were possible. These included covering the vessel with air bubbles to reduce friction.

“This technology is brand new,” he said. “We are in uncharted water and we are excited by the challenges.”

Source: SCMP

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