Tag Archives: energy

the latest on fusion power

The dream of fusion power is not dead. In fact, the science is apparently pretty straightforward but the technology of containing the plasma safely is not. Past attempts have focused on trying to contain the plasma inside a doughnut-shaped “tokamak” but there are some new ideas on that.

Fusion nuclear science facilities and pilot plants based on the spherical tokamak

A fusion nuclear science facility (FNSF) could play an important role in the development of fusion energy by providing the nuclear environment needed to develop fusion materials and components. The spherical torus/tokamak (ST) is a leading candidate for an FNSF due to its potentially high neutron wall loading and modular configuration. A key consideration for the choice of FNSF configuration is the range of achievable missions as a function of device size. Possible missions include: providing high neutron wall loading and fluence, demonstrating tritium self-sufficiency, and demonstrating electrical self-sufficiency. All of these missions must also be compatible with a viable divertor, first-wall, and blanket solution. ST-FNSF configurations have been developed simultaneously incorporating for the first time: (1) a blanket system capable of tritium breeding ratio TBR  ≈  1, (2) a poloidal field coil set supporting high elongation and triangularity for a range of internal inductance and normalized beta values consistent with NSTX/NSTX-U previous/planned operation, (3) a long-legged divertor analogous to the MAST-U divertor which substantially reduces projected peak divertor heat-flux and has all outboard poloidal field coils outside the vacuum chamber and superconducting to reduce power consumption, and (4) a vertical maintenance scheme in which blanket structures and the centerstack can be removed independently. Progress in these ST-FNSF missions versus configuration studies including dependence on plasma major radius R 0 for a range 1 m–2.2 m are described. In particular, it is found the threshold major radius for TBR  =  ${{R}_{0}}\geqslant 1.7$ m, and a smaller R 0  =  1 m ST device has TBR  ≈  0.9 which is below unity but substantially reduces T consumption relative to not breeding. Calculations of neutral beam heating and current drive for non-inductive ramp-up and sustainment are described. An A  =  2, R 0  =  3 m device incorporating high-temperature superconductor toroidal field coil magnets capable of high neutron fluence and both tritium and electrical self-sufficiency is also presented following systematic aspect ratio studies.

Sense what is using electricity in your home

This is pretty cool – a device that can learn the patterns and measure the electricity use of individual appliances in your home, all just from being plugged into your fuse box.

The company says it can accurately disaggregate 80 percent of home energy use; it can do things like detect a microwave oven through its very specific startup and operating power “signature,” or sense a washing machine thanks in part to subtly increasing demand on the motor as the drum fills with water. As it identifies garage door openers, toasters, microwave ovens, washing machines, heaters, and refrigerators, it displays them on an app as a newsfeed and a series of labeled bubbles.

Sense—founded by speech-recognition veterans whose technology ended up in Samsung’s S-Voice and Apple’s Siri—consists of a box about the size of an eyeglasses case installed inside or next to an electrical service panel. Two inductive current sensors sense current, and two cables power the box and sense voltage. The box does some onboard processing, and then uses Wi-Fi to send data to the cloud for further analysis and aggregation with data from other users to improve its accuracy.

transportation, electricity, and carbon emissions

It’s interesting that as the U.S. has made the switch to more natural gas and less coal, the carbon emissions of electricity generation and transportation have drawn essentially even, where power plants were the much larger emitter in the past. But you can imagine that if transportation begins to electrify on a significant scale, this distinction will be harder to make.

May 2016 in Review

3 most frightening stories

  • There are scary and seemingly reckless confrontations going on between U.S. and Russian planes and ships in the Indian Ocean. And yet, it is bizarrely humorous when real life imitates Top Gun.
  • The situation in Venezuela may be a preview of what the collapse of a modern country looks like.
  • Obama went to Hiroshima, where he said we can “chart a course that leads to the destruction” of nuclear weapons, only not in his lifetime. Obama out.

3 most hopeful stories

3 most interesting stories

  • I try not to let this blog get too political, really I do. But in an election season I just can’t help myself. This is a blog about the future of civilization, and the behavior of U.S. political, bureaucratic, and military elites obviously has some bearing on that. In May I mused on whether the U.S. could possibly be suffering from “too much democracy“, Dick Cheney, equality and equal opportunity, and what’s wrong with Pennsylvania. And yes, I’ve said it before and I’ll say it again, TRUMP IS A FASCIST!
  • The world has about a billion dogs.
  • It turns out coffee grounds may not make good compost.

April 2016 in Review

3 most frightening stories

  • The U.S. government’s dominant ideology of free trade and globalization may have roots in U.S. government propaganda designed to provide hidden subsidies to Japan and Korea, our Cold War allies in Asia. And resulting financial deregulation in the 1990s may have been the beginning of the end for the U.S. empire.
  • A new study says that ice melting in Antarctica could double sea level rise projections in the long term. Meanwhile, in the short term, the drought in Southeast and South Asia is getting more and more severe.
  • Robert Paxton says Trump is pretty much a fascist. Although conditions are different and he doesn’t believe everything the fascists believed. Umberto Eco once said that fascists don’t believe anything, they will say anything and then what they do once in office has nothing to do with what they said.

3 most hopeful stories

  • Brookings has a new report on encouraging innovation in the water sector. A lot of it is just about charging more, and it should be fairly obvious why that is politically controversial even if it is the right thing economically. But the report did have an explanation of decoupling (p. 28) which I found helpful. Decoupling is an answer to the puzzle of how a utility can support conservation without losing its revenue base.
  • The U.S. Department of Energy says the technical potential of solar panels is to supply about 39% of all energy use. And electric cars may be about to come roaring back in a big way.
  • Better management of agricultural soil might be able to play a big role in carbon sequestration.

3 most interesting stories

electric trucks

Now that it looks like electric cars may burst onto the scene in a big way, Planetizen says maybe trucks will be next.

Trucks are kind of a pet peeve of mine. They’re useful obviously, but they degrade the urban environment a lot through noise, air pollution, safety hazards, and just being in the way. Electric trucks would only solve a couple of these issues, but that would be welcome in my opinion. We just don’t need the big trucks downtown – they could drop goods off at warehouses on the outskirts and let smaller, safer, quieter trucks bring them in. Garbage trucks are particularly irritating – I like the idea of vacuum tubes to collect both sewage and garbage, although people often laugh at me for this idea (which already exists).

Standard Alternative Energy

In a slight irony, The Rockefeller Brothers Fund has joined the fossil fuel divestment movement.

Given the RBF’s deep commitment to combating climate change, the Fund is now committing to a two-step process to address its desire to divest from investments in fossil fuels. Our immediate focus will be on coal and tar sands, two of the most intensive sources of carbon emissions. We are working to eliminate the Fund’s exposure to these energy sources as quickly as possible. Given the structure of some commingled investment funds and investments in highly diversified energy companies, we recognize there may continue to be minimal investments in our portfolio in those energy sectors, but we are committed to reducing our exposure to coal and tar sands to less than one percent of the total portfolio by the end of 2014. As we take the steps to divest from coal and tar sands investments, we are also undertaking a comprehensive analysis of our exposure to any remaining fossil fuel investments and will work with the RBF Investment Committee and board of trustees to determine an appropriate strategy for further divestment over the next few years.

In working to align our endowment investments with our mission and programs, we will adhere to the longstanding mandate of our board of trustees that our assets be invested with the goal of achieving financial returns that will enable the foundation to meet its annual philanthropic obligations, while maintaining the purchasing power of the endowment, so that future generations will also benefit from the foundation’s charitable giving. In uncertain and volatile markets, these financial goals are not easy to achieve. Therefore, our divestment from fossil fuels, which is now underway, will be accomplished through a careful process of evaluating our exposure and a phased approach that proceeds as quickly as is prudent.

peak oil is still nigh

This Telegraph article suggests that OPEC expects oil prices to come roaring back relatively soon, and when they do there are worries that the drop in investment caused by the current low prices will make it impossible to keep up with demand. And market speculation can supercharge the up swing when it comes.

Mr al-Badri said the world needs an investment blitz of $10 trillion to replace depleting oil fields and to meet extra demand of 17m barrels per day (b/d) by 2040, yet projects are being shelved at an alarming rate. A study by IHS found that investment for the years from 2015 to 2020 has been slashed by $1.8 trillion, compared to what was planned in 2014.

Mr al-Badri warned that the current glut is setting the stage for a future supply shock, with prices lurching from one extreme to another in a deranged market that is in the interests of nobody but speculators…

The paradox of the current slump is that global spare capacity is at wafer-thin levels of 2pc as Saudi Arabia pumps at will, leaving the market acutely vulnerable to any future supply-shock. “In the 1980s it was around 30pc; 10 years ago it was 8pc,” said Mr Descalzi…

By the end of this year there may be a “small deficit”. By then the world will need all of Opec’s 32m b/d supply to meet growing demand, although it will take a long time to whittle down record stocks.

So to put it in stock and flow terms, there is a big stock built up right now, and demand is less than what can physically be supplied (these are flows), so prices are low. When (if?) the global economy picks up at some point, demand may be greater than what can physically be supplied. The stock will gradually get used up, and as investors start to realize it is getting used up and supply will not be able to keep up, prices will rise, maybe fast. High prices will eventually spur investment and the cycle will repeat. This is how it plays out all other things being equal. But some of the other things are renewable energy, maybe nuclear energy, carbon credits/taxes/caps, maybe approaching physical limits on the big Middle East oil reservoirs, food and water economics, public sentiment, and geopolitics, all of which can shift the economics at the same time fossil fuel technologies and markets are going through their gyrations. Interesting times.

killer robot news

In killer robot news, there is a drone now that can roam around on its own and kill by injecting poison with a needle. No, it’s still not Ray Bradbury’s mechanical hound, which I am still expecting any day now. This one is roaming the Great Barrier Reef murdering starfish.

I still find it just a tiny bit disturbing. But I also wondered if chemical pesticides could be replaced by tiny drones that target specific pests. That is likely to be one topic of the science fiction masterpiece series I plan to write as soon as I become unexpectedly independently wealthy and retire from my day job. Of course, in my science fiction book, they will probably start running amok and killing all the pollinators, which will of course threaten the world food supply. But then someone will invent a pollinator drone, which will seem like a good idea for awhile until in a desperate attempt to save the world’s remaining natural ecosystems, we seed them with these various drones and they, well, run amok somehow. Aren’t most science fiction stories about something or other running amok?

And in one more robot story, there was an autonomous quadcopter unveiled at CES (you’re supposed to just know what that stands for) that can supposedly carry human occupants, although nobody has been brave enough to ride in it.

Ehang, the drone maker, claims its all-electric quadcopter, the Ehang 184, is the first in the world that is capable of operating autonomously. According to the company’s announcement, the vehicle is like an oversized drone – built just big enough to carry a single passenger. That passenger supposedly has only to plug in their desired destination, sit back, and enjoy the ride while the aircraft takes off and climbs up to 11,000 feet. If there is a problem, Ehang says the human passenger can take over the controls and pilot the chopper to safety…

Despite the skepticism, Ehang officials believe their autonomous quadcopter could revolutionize personal travel on a global scale. “It’s been a lifetime goal of mine to make flight faster, easier, and more convenient than ever. The 184 provides a viable solution to the many challenges the transportation industry faces in a safe and energy-efficient way,” said Ehang CEO Huazhi Hu. “I truly believe that Ehang will make a global impact across dozens of industries beyond personal travel. The 184 is evocative of a future we’ve always dreamed of and is primed to alter the very fundamentals of the way we get around.”

There are obvious military uses – no needles attached to these but I don’t see why there couldn’t be. It might seem dangerous to drive these things around town. But one more thought I have is that if we replaced our rubber-wheeled cars with something like this, it could obviate the need for so much pavement even if it were just elevated a few inches or feet off the ground. Maybe they could be soft and just bounce off each other at low speed without damage. Maybe they could stack or hang on hooks rather than needing horizontal parking lots. Maybe we could get rid of a lot of pollution and flooding caused by all that pavement, plus a lot of the toxins that come from tire and brake dust. It might take more energy though to both elevate these vehicles and propel them around than we use on cars now, I am not sure about that. A clean cheap energy source would always be a good idea.