Posts Tagged ‘Wuhan’

Chinese Scientists Working on Zero-Carbon Plasma Jet Engines

May 7, 2020

Here’s an interesting piece of science news, courtesy of yesterday’s I, for 6th May 2020. According to the article by Madeleine Cuff, ‘Plasma jet engine could be used for zero-carbon passenger flights’, Chinese scientists are working on a new type of jet engine in which conventional aircraft fuel would be replaced by plasma – ionized gas. The article on page 28 runs

Scientists have designed a new kind of jet engine that may be able to fly planes halfway around the world without using fossil fuels.

The prototype, dreamed up by Chinese engineers, relies on thrusters powered by compressed air and electricity to create a zero-carbon flight.

Flying is one of the fastest-growing sources of greenhouse gas emissions. Researchers have spent years hunting for low-carbon technologies to cut aviation’s carbon footprint, but finding a clean fuel source powerful enough to support a full-sized passenger jet has proved elusive.

A team at Wuhan university believes the answer lies in something called microwave air plasmas.

Beyond solid, liquid and gas, plasma is the fourth state of matter. It is a form of electrically charged gas, which – when activated – can cause surges of energy. 

Certain kinds of plasma jet thrusters have been used before to power Nasa probes in space, but they were not powerful enough to fuel flight within the Earth’s atmosphere.

The team believes it has solved this problem by designing a thruster that creates plasma from air mid-flight by compressing air into high pressures and using a microwave to charge it. If scaled up, it can create enough thrust to match a commercial jet engine, the team claims.

“Our results demonstrated that such a jet engine based on microwave air plasma can be a potentially viable alternative to the conventional fossil fuel jet engine,” said the study’s author, Dr Jau Tang.

More work is needed to improve the prototype’s efficiency before it can be tried in a full-sized jet and getting enough electricity to the engine to create plasma could also present a significant challenge.

But if it can work on a large scale, it could usher in an era of guilt-free flying.

The research is published in the journal AIP Advances.

I wonder how the engineers intend to force air into the jet engine at sufficient pressure that it can be ionised and used to generate thrust. At the moment conventional jet engines solve the problem of obtaining enough air to mix with the fuel through using powerful turbines that suck the air in. If this engine uses something similar and its powered by conventional aircraft fuel, although its carbon footprint will be low it still won’t be zero. Or perhaps the turbines would use extremely powerful electric motors.

It seems to me that the basic concept is sound, as last year a group of American aerospace engineers showed that ionized air around a plane could be used to provide extra lift and make the vehicle travel further. They did this by stringing electrically charged wires above and below the wings of a miniature aircraft, which was then launched into the air. The model did actually fly further than it normally would using conventional propulsion.

Obviously these plasma drives are still a long way off from coming into service and need a lot of development, but they do show a great deal of potential. Hopefully they will prove practical, and will usher in an age of air transport, where the carbon emissions will be greatly reduced, if not zero.

Farage and Charlie Kirk Stir Up Racial Tensions with Accusations of Chinese Responsibility for the Coronavirus

March 20, 2020

As if the disease itself, and the fear and uncertainty caused by the measures by the measures countries all across the world have been forced to adopt to combat the Coronavirus aren’t enough, certain figures on the British and American political right have decided to make the situation worse by throwing around groundless accusations about responsibility for the outbreak. Nigel Farage, owner of the Brexit Party Ltd, and the odious Charlie Kirk, have declared that the Chinese are responsible for it. Zelo Street put up a piece about this latest revolting development, as Benjamin J. Grimm, your blue-eyed, ever-lovin’ Thing used to put it, yesterday.

Almost predictably, it appears to have begun with a comment Trump put out over Twitter. In flat contradiction to everything he had previously said, Trump declared that he had always taken ‘the Chinese virus’ very seriously. One Twitter commenter, who went by the monicker of BrooklynDad_defiant, told Trump that the disease was called the Coronavirus or Covid-19 if he found the first name too difficult. He was endangering Chinese-Americans, and had dismissed the virus as a hoax, claimed it was down to zero and that it had been contained. None of this was true.

Then the Fuhrage decided to put his oar in. He tweeted that corporate America was standing with their President in this emergency, unlike the UK, and that Rishi Sunak’s relief measures were in line with those of France. Which ignore the fact, as Zelo Street reminded us, that the French government isn’t offering loans to help out businesses. And then Farage went to his default position of blaming foreigners, and claimed that the Chinese were responsible. He tweeted “It really is about time we all said it. China caused this nightmare. Period”. And then followed this with “It is time we all challenged the Chinese regime. Enough is enough”. He followed this up by retweeting an approving tweet from Charlie Kirk, the poster boy for the right-wing organisation, Turning Point USA, who said

In the age of Trump -we’ve learned that the media is hellbent on spreading disinformation and lies. So if we don’t speak the truth, who will? [Nigel Farage] is right and its time we all listen: China caused this pandemic. They should be forced to pay”.

Zelo Street remarked about this display of racism that Farage and Kirk wouldn’t know the truth if it kicked them squarely in the crotch. They are good, however, at screaming ‘liar!’ and ‘Fake news’ at media organisations they dislike in order to rile up their bases. The Sage of Crewe concluded

‘The situation with Covid-19 is serious. It is serious enough that no responsible politician should be going anywhere near leveraging it to whip up the mob.

That Nigel Farage is doing just that tells you all you need to know about where he’s at.’

He’s exactly right, as he began the article with a quotation from the South Korean Foreign Minister, Kang Kyung-wha on the Andrew Marr Show, expressing her concern about a rise in racially motivated attacks on Asians in other countries in response to the crisis. She naturally wanted governments to crack down on it, because it was helping the spirit of collaboration the world needs to combat the crisis.

https://zelo-street.blogspot.com/2020/03/farage-uses-crisis-to-whip-up-mob.html

She isn’t alone in these fears. A few days ago I received a message from the anti-racist, anti-religious extremism organisation, Hope Not Hate, describing what they were going to do as a response to the virus. They aren’t just trying to help combat the virus itself, as very many other organisations and charities are also doing, but are trying to expose and tackle the way the crisis is being exploited by Fascist groups. The email said of this part of their work

For example, we’ll be releasing new content on how extremists use the messaging app Telegram to promote terrorism next week. At the same time, we’re adapting our work, conducting research on how the far right are responding to COVID-19 and any way in which they may be weaponsing it. Because of the nature of the virus we are also increasing our research into conspiracy theories. We hope that these areas will allow us to counter how forces of hate are seeking to use this global pandemic.

Now you would have thought that Trump would have been more careful before he blamed the Chinese for the virus. I can remember how George W. Bush during his tenure of the White House 12 years and more ago made an official apology to Japanese-Americans condemning their internment during World War II. It was an apology Japanese-American activists like Star Trek’s George Takei had fought long and hard for. The last thing Trump should be doing is trying to reopen old wounds about his country’s treatment of Asian Americans, and no politico on either side of the Pond should be trying to stir up racial tensions at this time anyway.

The Chinese Communist regime is responsible for any number of atrocities and horrors, from the invasion of Tibet, the genocide of the Uighurs, the suppression of democracy in Hong Kong and the mass deaths of the Cultural Revolution. But it is definitely not responsible for the Coronavirus. The Chinese have made massive efforts to contain and eradicate it, even isolating the province in which it emerged, Wuhan. I’ve also heard nothing to suggest that they have been nothing but entirely collaborative with other nations in the global attempts to combat this disease.

I think Trump called the Coronavirus the ‘Chinese disease’ simply out of stupidity and laziness. He couldn’t remember, or couldn’t be bothered to remember, what it was really called. But Farage and Kirk just seem to have blamed the Chinese out of sheer racism.

This is immensely dangerous, when people are as isolated, vulnerable and fearful as they are now, and Farage and Kirk are to be condemned for their inflammatory, bigoted remarks.