Category Archives: Energy

50km wireless link for Farallon Islands

I thought I wrote about this before but it doesn’t seem to show up anywhere. Tim Pozar gave an excellent presentation on how he and Matt Peterson built a wireless link from San Francisco to the Farallon Islands.

WMV and PDF available from NANOG49

The presentation will cover the requirements for a very limited budget and power consumption, issues of remote deployments, long distance microwave links over the ocean, sensitivity to the largest breeding colony the contiguous United States.

Additional network topics will be the requirement to support various services on the island via VLANs, fiber deployment to overcome distance and lightning, RF path calculations, “tuning” of the radio modulations schemes to provide the best up-time and remote support of a location that may only be accessible once a month.


Sailing around the Farallon Islands: Photo by me

Funnel Triples Wind Turbine Output

Wind LensIt has a fancy name and design but as you can tell from the photo it is a simple innovation based on a reverse funnel effect. Cleantechnica reports:

The Wind Lens works by creating an area of low pressure behind the turbine that essentially sucks the wind through the turbine, increasing effective wind speed. As wind power is proportional to the wind speed cubed, the wind lens changes the fluid dynamics around the turbine to increase its power.

Can we expect to see datacenters designed around tubines in the near future? Both new power and cooling solutions may be found by engineers trying to harness the wind. I envision a tunnel that flows through a datacenter to power turbines yet also pull heat out and away.

I’ve already written about the overproduction of power from wind turbines in Germany that has forced them to export energy to their neighbors.

Now the Japanese appear ready to take the issue even further by dropping the cost of wind energy below nuclear energy and forcing a giant shift in risk calculations.

Imagine: no more dirty coal power, no more mining deaths, no more nuclear disasters, no more polluted aquifers as a result of fracking.

Fair enough but don’t forget to imagine instead some new risks such as climbing up giant turbines to service them, the impact to weather and wildlife

How penguins know when to land

New research indicates that penguins can count, or maybe subtract. Either way, they can measure energy spent in order to predict the time to stop flying.

When fishing in open water, the ten free-rangers studied, over the course of 15,978 dives stayed under for an average of 5.7 minutes. When fishing from a hole in the ice however, the three birds under study dived 495 times but stayed under much longer, which led the researchers to believe that the penguins’ decision to end their time under water wasn’t about how long they’d been under at all. This led them to consider the possibility that it was based on energy expended instead, which is how they came to start counting how many times the penguins flapped their wings to propel themselves while chasing after fish.

Turns out regardless of whether the penguins are fishing in open water, or through a hole in the ice, they flap on average 237 times before surfacing. Thus, it seems rather clear that they are basing their time spent under water on energy spent flapping, rather than on some predetermined time span; though, how they count and keep track, is still anyone’s guess.

Emperor penguins flying
Emperor penguins flying. Photo by Guillaume Dargaud

Mini Diesel Coming to America?

A sad and somewhat funny story in MotoringFile by the MINI USA Product Manager

I’ve been on a personal mission to get Diesels here in the US since 2007. I’ve owned oil burners myself (PowerStroke F-250, X5 35d) and love the purring clatter of a Diesel that let’s everyone know that you’re smarter than the current crop of Prius drivers on the road. Couple that with incredible fuel economy, great drivability and the 40% increase in fuel economy, it is so obvious that we should have a MINI Diesel in the US. While many people think we’ve been dragging our feet and that we’re anti-Diesel, the opposite is true. I know many claim that they have gone to other makes because we don’t have the Diesel here, but we hope we can win them back.

Oh, that sounds good, although he is missing emissions as one of the virtues of diesel. Perhaps that’s not a mistake given his list of his prior diesel engines are both trucks with horrible mileage and emissions. Keep that in mind when you see how he blames the regulators for Mini’s inability to import their engines.

…Diesel vehicles in Europe conform to very rigid but more importantly, predictable, BIN standards that do not require SCR. This is unlike the US where every lawmaker is trying to get a book deal by becoming automotive engineers and petroleum industry experts overnight and to re-write the law as they go.

So MINI Diesel won’t be coming anytime soon. Apparently the company is unable to figure out how to stay ahead of American requirements, which most people would say are long overdue. Case in point, he describes Mini design and engineering as not responsive enough to adapt to what they call a surprise in requirements:

…the changes to the CAFE and EPA regulations by the Obama administration meant that we’d (by law) have to add urea injection two years sooner by 2013, during the lifecycle of the current R5x platform. So, Plan A was to sell a MINI Diesel for two years without SCR and to then add urea injection when it was needed. Plan B was to add urea injection right away, so that we wouldn’t have to worry about it. We asked the engineering team, the Oxford plant and the internal project financing team what it would take. The answer was a STAGGERING amount because of the necessary changes to the body-in-white. We all love our MINIs but often forget just how tightly packages the car is today and to provide a place for the urea mixture tank, pump, lines, wiring and injection system, we needed to re-engineer the car with a new floorpan, left rear quarter panel, inner wheelhouse and attendant hardware (including interior panels and trim.)

Maybe that’s a huge problem and a surprise to a person who buys an F250 or a X5 diesel for a town car but achieving better emissions definitely should have been no great hurdle for the company that makes the Mini and wants to sell into the small/efficient car market.

If I had a dollar for every company that said “regulators are always behind” and then later said they can’t meet regulations because they change too quickly…

The truth is regulators move in response to large and obvious trends in public sentiment. The politicians react to public and private influence that is no secret and easily predictable. Mini should have been anticipating the rules and working with the regulators directly ahead of time if they had any concerns about meeting them. I don’t accept their excuses at all.

Imagine if Mini made the same argument in other areas of marketing as they do with their emissions problems. Note how the story describes the virtues they measure in an engine, in line with the opening paragraph above:

Now I know you will all hate me, but I had a chance to drive it and the thing is incredible. It was Pepper White manual R56 Cooper SD on 17s. It rips out of the gate like the current Cooper S and just revs, all the way to 4,500 rpm. It has noticeably more noise than the N18 (about 40% more) but like I said, it’s GOOD noise! Best part, it can get 48 mpg (true US conversion.)

Unfortunately “rips out of the gate” is not the full set of criteria to measure the success of their engineering. Even 48 mpg for a high-performance engine is not enough (and unimpressive, given that a full-size Jaguar diesel averages 62 mpg; a Fiat 500 diesel gets 56 mpg).

Although Mini marketing probably pushed engineering into performance and mpg and thought they were important to grow market share, even more important was the ability to exceed basic expectations of clean emissions (e.g. regulatory requirements).

Mini Cooper Diesel
Engineered wrong and unable to win you back: the dirty Mini Cooper Diesel