Monday, November 13, 2023

Perspectives on Forest Fires

 

For some unknown reason, I was absent-mindedly wandering through an old edition (July 13th, 2023) of The Valley Voice a few days ago, and came across another "Voice from the Valley", written by one of the local sages.  Should you wish to see what attracted my attention, you can see it here, on page 4, where it's called "Wildfires".

So far as I can tell, the writer seems to be upset that forest fires have been renamed "wildfires", a term he believes is only used to scare us all.  And, of course, scaring all of us is part of the "climate change agenda", presumably being pushed by radical environmentalists, the WEF, Bill Gates, the UN, the WHO and possibly even the NHL.  I jest, of course, but the number of vocal conspiracy-minded individuals seems to have mushroomed recently.  I think COVID-19 pushed some people over the edge.  But I digress.

I just finished reading Fire Weather - The Making a Beast.


A good bit of this story describes the May 2016 fire that destroyed a few thousand homes in Fort McMurray and forced the evacuation of close to 90,000 people.  Total cost has been estimated at close to $10 billion.  In addition to destroying 2400 homes and other buildings, the fire burned 1.5 million acres and wasn't declared completely out until early August the following year.

One thing that struck me (among a list of many) were descriptions of houses being completely consumed by fire in around 5 minutes, start to finish.  The speed and ferocity of this fire's advance was startling to everyone there to witness it (mostly professional firefighters).  As the author points out, this is the way fires behave now, more like a wild beast than what we were used to.

So our local sage might believe that forest fires have been renamed just to scare us, but my observation, having read Vaillant's book, would be that our forest fires (aka: wildfires) ARE something to be VERY worried about, even scared, and maybe that's what it will take to prod us into the changes necessary to avoid worse in the future.

I wonder what the residents of West Kelowna thought as last summer's "wildfires" swept down form the hills and raged through their neighbourhoods.  Did they think "wildfire" was just a scare tactic?

Our local sage goes on to rail against the hated Carbon Tax, insisting that it's ineffective, a cash grab by government, unnecessary....you get the picture.

(For those who might have forgotten, the Carbon Tax wasn't brought in to "save the planet".  It was brought in partly to act as an incentive - financial - for people to make different energy choices.  It was also brought in as a tax on pollution, since fossil fuel burning has been polluting the atmosphere for free for decades.  In fact, the taxpayer supports billions in $$ of subsidies to the fossil fuel industry each year, just so they can keep doing what they've always done).


Danielle, of course, is still looking for arsonists.

Our local sage mentions a number of things that aren't quite the way he describes them.  For instance, Germany dismantling a wind farm to make way for more coal mining.  What he neglects to mention is that the wind farm in question had been in use since 2001, the turbines are much smaller and less efficient than current models and despite plans to phase out coal-fired power generation by 2030, there are still concerns with adequate power supply, especially in the wake of Russia's invasion of Ukraine.  This isn't happening because renewables aren't working or because climate change isn't real, as our sage tries to infer.  Two stories here in the interests of promoting more informed discussion - more easily available on the Google Machine.



Of course, this is what governments often do.  Here in Canada, despite all the nice-sounding talk, REAL action to address climate change has been tepid, at best.  

I hear talk that the next Federal Election will be a Climate Change Election.  I'm beginning to believe that will mark a turning point.  Either we will DO something or we will kick the can down the road another few years, by which time it will be even more difficult (and expensive)  to change our current trajectory.

As for Fire Weather?  Find the book and read it.  It will be well worth your time.  And if it doesn't make you afraid of your next forest fire experience, I will be very surprised.

[Update:  In an exchange on that anti-social platform run by Meta, one commenter responded to my post by name calling - socialist, communist - and pointing the finger of blame everywhere except at the very activities that contributed to making the Fort McMurray fire what it was - CO2 emissions from the oil and gas industry which are directly linked to a warmer climate which, as expected, is making forests hotter and dryer than usual, especially for that time of year.  Mr A.B. Woodpile (clearly not his real name - I often find these people don't have the guts to do anything other than hide behind fake identities) apparently doesn't realize that taxpayers paying billions in subsidies to the fossil fuel industry and paying for abandoned well cleanup, messes left behind by oil and gas companies, is a classic example of socialism.

Mr Woodpile also claimed that the then-Premier, Rachel Notley, refused industry help in creating fire breaks so it was HER fault that the fire entered Ft McMurray.  The facts are that over 500 hectares of fire breaks WERE constructed in an attempt to stop the fire.  They didn't work.  The fire also jumped the Athabasca River, and thus gained access to the city, at a point where the river was close to half a kilometer wide.  This is the nature of more and more of our fires these days.  And we know why.

As an aside, during last summer's fires in the Okanagan, the West Kelowna fire jumped Okanagan Lake.  In Ft McMurray, spot fires were starting kilometers ahead of where the fire front actually was.

One other thing I discovered while looking for information related to the Ft McMurray fire.  Apparently Russia offered some of its huge fire-fighting airplanes which they use there.  The Federal government turned them down.  Why?  This was a massive fire with smoke plumes reaching up into the stratosphere.  So, very limited visibility, combined with pilots unfamiliar with the terrain.  It's a known fact that aerial accidents are the main causes of death during fire fighting operations.  It was deemed unsafe to add massive planes with unfamiliar pilots whose English language skills would likely not be that great, to an already dangerous situation in difficult terrain and conditions.

I understand that Mr Woodpile is bitter and angry, but his anger is misplaced and poorly informed.  As Jim Prentice said some years ago, look in the mirror for the source of your perceived problems.]


Wednesday, November 08, 2023

Book Review - The Petroleum Papers

 

The Petroleum Papers - Inside the Far-Right Conspiracy to Cover Up Climate Change

by Geoff Dembicki

I had good intentions, but as my father used to say, "The Road to Hell is Paved With Good Intentions".  

While reading this most interesting and informative book, I made many bookmarks, but, in the end, there were just too many.  It's a borrowed library book and people are waiting to read it.  So, in the interests of getting the book back so others can read it, I'm linking this post to a review article that appeared over a year ago.

The Petroleum Papers by Geoff Dembicki.  A non-fiction book about the role of the oil and gas industry in the climate crisis.

Relying on actual industry documents, the author shows how industry scientists knew decades ago what pollution from the ol industry would do to the environment and, specifically, the global climate.  Industry executives knew and they hid that knowledge from the public and mounted a campaign to sow the seeds of doubt about what was being learned about climate change.  There is a very clear parallel between what the oil industry has been doing and what the tobacco industry did years ago as knowledge was developed about the links between smoking and cancer.  

In 1997, one tobacco company finally admitted that smoking caused cancer.  That was the beginning of the end of the lies and deception.  The same thing is starting to happen with the oil and gas industry as various legal actions are being taken against the companies that promoted lies and misinformation.

Recent stories have highlighted the issue, like this one in Scientific AmericanExxon Knew About Climate Change Almost 40 Years Ago.

The world is changing.  While not all the news is encouraging, the trend seems clear.  Canada, as the fourth largest oil and gas producer in the world, has a responsibility to address climate change.  We can't hide behind the excuse that there are only 40 million of us and we're not significant.  We are NOT on track to reduce our emissions as governments have promised.  We can do better.

This book will help people understand why and what we are fighting.


Post Mortem on an E-bike motor


 Sometime around mid-summer, my partner's e-bike motor failed.  Given that this was during prime biking season and therefore somewhat of a crisis, I just order a replacement and switched the insides, setting the old motor aside for inspection later.

This past week, I took a morning and investigated a bit further.



I started by removing the drive gear.  Only three little screws.  Then I hooked up the puller to remove the rotor.  This part was easy to get off but there are strong magnetic fields here and it's not possible to pull if off by hand.



Once off, it only took a few minutes inspecting to see what had happened.  For some reason (to be determined later) the rotor rubbed against some of the windings on the stator and shorted them out.  Wear marks were clearly visible and some of the wires had the insulation worn off.


Next steps are to figure out why the rotor rubbed against those coils AND what can be done to rehabilitate the motor.  The rotor sits on a bearing that is visible in the picture.  I don't know if there is anything that keeps that bearing in that position or not.  I'm also thinking that I might be able to paint something on the worn wires that would sort of restore them to original condition, but that's for another day.


Saturday, November 04, 2023

E-Bike Repairs - Hub Motor Hall Sensors


One of the apparent "benefits" of owning an e-bike is the opportunity to learn as much as you might care to know about e-bike electronics.  There are plenty of regular bike things to deal with - tires, tubes, bearings, chains, brakes and such, but the electronics of e-bikes adds a whole new level of complexity.

We've been having a few issues recently and mine began a week or so ago while out on a ride.  A sudden decrease in power accompanied by a noise that reminded me of a cold or dry bearing.  I've heard them before in old cars coming from the inside fan when it's really cold.

I ended up replacing the clutch/planetary gear assembly in my bike which might have solved the problem (that's another story), but I wanted to learn how to test Hall Effect sensors because someone had mentioned that they could cause problems and I wanted to know what to expect.

I managed to find this video which explain what Hall sensors do.  Many e-bike motors have 3 (sometimes 4) of these sensors which are used to detect a moving magnetic field and send that information to the bike's controller.  The video explained how to test these sensors very nicely.  I used the procedure near the end of the video because I had an old motor that I could practice on.


This shows the motor and the circuit board the sensors are attached to.  Note the coloured wires in the middle.  These supply power (+5v red), ground (black) and the 3 Hall sensor output wires (blue, green and yellow).  There is a fourth wire coming from another Hall sensor that I believe has something to do with speed measurement.


I set up my test equipment the way the video described, complete with a 10K ohm resistor, tack soldered the power leads from an old USB cable to the circuit board and proceeded to test.  As the video described, as I moved the inner part of the motor so that the sensors were moved past the outer ring of magnets, the output voltage from each sensor changed from +5v to 0v and back.  This change indicated that the sensor was good.  This particular motor was replaced because it had other problems.  It appears the Hall sensors were fine.  I haven't yet figured out what the original problem was.  


This photo shows the power supply I used, an old USB cable (red is +5v and white was 0v) and a wall charger.  I also made a quick circuit diagram from the video to remind me of the proper connections.

More ebike discussions likely to come.