jump to navigation

太空电力 March 30, 2015

Posted by Maury Markowitz in Uncategorized.
add a comment
That's a lot of paper to crunch on that CRT!

That’s a lot of paper to crunch on that CRT!

Once again the undead topic of solar power satellites has raised its hand and flagged down the hoards of space enthusiasts over on Slashdot (thanks for the stats bump everyone!).

A post entitled Chinese Scientists Plan Solar Power Station In Space might lead you to falsely conclude that some actual work is taking place. A slightly more accurate title can be found if you click through to the linked article, Chinese scientists mull power station in space. And if one takes the time to actually read the article in question, you might conclude the title should read Retired Chinese rocket engineer gets some free press.

Harsh? Maybe. The person in the article is Wang Xiji, formerly of China’s space development agency and best known as the lead designer on the Long March 1, China’s first space booster. He indirectly launched their first satellite, Dong Fang Hong 1, in 1970. As is always the case with these stories, the real motivation quickly becomes evident when you consider quotes like “we need a cheap heavy-lift launch vehicle”.

Xiji is an astonishing 93 years old, and clearly hale. I should be so lucky! And if age really does translate into wisdom (we should all be so lucky) then clearly my feelings on space power have to be wrong. But in this case, I’m going to chalk it up to age before beauty.

Renewable growth in the US: 1, 2, 3 March 14, 2015

Posted by Maury Markowitz in power grid, solar.
add a comment
image of two wind turbines in China

They’re popping up like weeds!

Three reports that came out about the same time highlight the dramatic changes to the US power mix which is going on largely without comment outside the nerdy circles (like this one).

The long and short is this: wind power in the US will double to about 10% in the next five years, and make up something like 35% of the US grid by around 2050. That’s fast, but solar is going in ever faster, outpacing wind. Coal is disappearing, while gas turbines take up its place.

As always, this is really about cost. Wind turbines and gas plants are far, far less expensive than any non-hydro conventional source. PV isn’t that far behind. Coal plants are actually more expensive than any of these, nuclear even more. And that, basically, is that.

(more…)

Areva in turmoil, bullet dodged? March 5, 2015

Posted by Maury Markowitz in Uncategorized.
3 comments
Image of a French nuclear reactor

Funny, it doesn’t look like a boat.

The newswires were alight this morning with the latest tale of woe from the nuclear industry; Areva, what’s left of the mergers of various French and other European nuclear firms, announced losses that were greater than the company’s book value.

The company is exploring “voluntary departures” while the government is arranging a bailout to save some of the industry’s 220,000 employees from what appears to be an impending financial implosion.

Which makes the recent sell-off of Canada’s version of Areva, AECL, seem prescient. After eating about $50 billion of taxpayer’s money for 50 years with no upside in sight, the company was sold off for negative $750 million and promptly disappeared into a partnership with the Chinese that has so far yielded zero dollars in actual work.

Looks like we dodged a neutron!

Fusion – ain’t gonna happen February 28, 2015

Posted by Maury Markowitz in fusion.
Tags:
add a comment
Image of ITER under construction with the concrete floor being build.

ITER is a big hole in the ground. Literally and metaphorically.

A while back I wrote a lengthy article on the problems facing the fusion energy concept, and how even if the technical issues were solved, it wouldn’t make a difference…

No matter how hard you try, a fusion reactor will be more expensive than power sources we have now, so no one is going to build one.

The argument was made by, and backed up by, lots and lots of independent studies. I was merely the messenger. The messenger was attacked, of course. This tech has convinced so many people of it’s total awesomeness that logic simply no longer works. Well, maybe this will…

(more…)

Lies, damb lies, and misleading graphs – electric car efficiency in the AAAS February 21, 2015

Posted by Maury Markowitz in Uncategorized.
add a comment
Map of energy use of electric cars from the AAAS

Shouldn’t they have a caption here?

So someone slashdoted this story in the AAAS. Along with it comes the fancy graphic on the right. Looking at that graph, it seems that the energy use of electric cars anywhere outside the deep south is terrible! And it looks that way until you read the small-print caption under the graph…

The average energy consumption per mile for an electric vehicle fleet over a full year. South Florida and the Pacific Coast boasted the greenest rates (170 Wh/km), whereas the upper Midwest fared the worst in terms of energy efficiency (196 Wh/km; red).

That’s right, the difference from green-is-good to red-is-bad is 26 Wh/km, or 13%. Wow, nice graph, AAAS. What’s worse, they fail to mention that gas powered cars also suffer from the same sorts of milage degradation in the cold, only worse. My Civic Hybrid gets about 53 mpg (US gallons) in the summer and only 38 in the winter.

I suggest everyone take a bit of their time and read my previous article on the topic. Running an electric car in the red area is still twice as efficient as a gas car in the same region.

2014 ended with a bang February 4, 2015

Posted by Maury Markowitz in Uncategorized.
add a comment

I’ve been writing this blog for five years now. I started it to cover the goings-on at AECL, but it emerged as something larger, covering renewables as well. And what happened to renewables in those five years I never would have predicted. Here’s a couple of quick notes to start off the year.

(more…)

Follow

Get every new post delivered to your Inbox.

Join 141 other followers