Extinction Rebellion, ongoing disscussion.

[eatyourveg]

More Brainwashing for you courtesy of the Heartland Institute. Lovely bunch of people and about time someone stood up to the creature that is Greta, who is clearly a. a lizard person and b. a flat earth proponent.

Another young person Naomi Seibt, plainly acting on her own cognisance and with no support from her elders, dishes it out to the evil Greta.


https://www.theguardian.com/us-news/202 ... te-sceptic

Go Naomi, Team Apoplectic older bloke is right there with you! You have all the answers.

[woodburner]

More brainwashing brought to you by the BBC

https://twitter.com/bbcstudiospress/sta ... 15681?s=21

Certainly is brainwashing. Though the having a go at Greta is not helpful She has problems not of her own making, and needs some care and help, not as her abusive (or ignorant) parents are doing, and using her as a useful idiot.

Daniel Amen specialises in SPECT brain scans which reveal a lot about behaviour problems. The database now stands at over 120,000 scans. Here is a humorous video as an introduction, but if it interests you he has videos on youtube which are more in depth, and shed a “new� light on how brain operation manifests in behaviour. The videos may be useful for those here with sleep problems, since he explains that may be influenced by ANTS (Automatic Negative Thoughts) some of which could be brought on by looking at “news� channels. There’s a video about challenging negative thoughts too.

His view is “You are not stuck with the brain you have�. It’s possible to do things which will help your brain, and he uses supplements as a first line of treatment rather than psycho drugs. Helping your brain not only helps you, but improves life for everyone you come into contact with.

[kenneal - lagger]

The only "useful idiot" that I have noticed around here is that troll from the Heartland Institute and supporter of other idiots such as Monckton, our very own woodburner.

He who quotes us scientific reasoning from Youtube, can't find any of the supposed 3% of Climate Scientists who deny Global Warming/Climate Change/Global Heating, what ever you want to call it, and supports almost any conspiracy theory going as if every one who has studied anything has an agenda and is wrong while he who has studied nothing in depth is right on all things.

That's modern day life on the internet for you.

[adam2]

I again met several local XR supporters, socially distant of course.

I remain impressed by their commitment and concerns about climate change.

Unfortunately, I was much less impressed by a general lack of basic scientific knowledge especially WRT fuel, energy, and power. I refer here not to specialist or degree level knowledge, but to only a little beyond common sense and at most GCSE O level physics and chemistry.

In particular a lack of basic knowledge of the carbon cycle, whereby carbon is cycled through natural processes. Not able to appreciate the difference between carbon dioxide from by fermenting beer, and that from combustion of fossil fuels.

At least two supporters admitted to the purchase of magic energy saving devices.
One believed that a "unit" of electricity is smaller than in the past.
And another had blown up a 12 volt public address system by connecting it direct to a large PV module, without a battery.
And numerous other myths and misunderstandings too tedious to repeat.

Commitment is good, but should be accompanied by a bit more knowledge.

[UndercoverElephant]

I again met several local XR supporters, socially distant of course.

I remain impressed by their commitment and concerns about climate change.

Unfortunately, I was much less impressed by a general lack of basic scientific knowledge especially WRT fuel, energy, and power. I refer here not to specialist or degree level knowledge, but to only a little beyond common sense and at most GCSE O level physics and chemistry.

In particular a lack of basic knowledge of the carbon cycle, whereby carbon is cycled through natural processes. Not able to appreciate the difference between carbon dioxide from by fermenting beer, and that from combustion of fossil fuels.

At least two supporters admitted to the purchase of magic energy saving devices.
One believed that a "unit" of electricity is smaller than in the past.
And another had blown up a 12 volt public address system by connecting it direct to a large PV module, without a battery.
And numerous other myths and misunderstandings too tedious to repeat.

Commitment is good, but should be accompanied by a bit more knowledge.

That problem comes from the top down. Roger "All mammals are herd animals" Hallam is no scientist.

[UndercoverElephant]

If anybody is interested in the more fruity end of XR.... https://new.reddit.com/r/xrmed/ (*rmed).

[Snail]

https://nypost.com/2021/02/04/greta-thu ... st-tweets/

Greta thunberg accidentally reveals she was told what to tweet on Indian farmers revolt.

"The 18-year-old left-wing eco-activist shared — and then quickly deleted — a message that detailed a list of “suggested posts” about the ongoing protests..."

[adam2]

Extinction rebellion protesters acquitted by jury.

https://www.bbc.co.uk/news/uk-england-london-56853979

Despite the instructions of the judge.

[BritDownUnder]

Extinction rebellion protesters acquitted by jury.

https://www.bbc.co.uk/news/uk-england-london-56853979

Despite the instructions of the judge.

If the UK had stronger civil laws of compensation it would have been better to sue these people in civil court for the cost of the damages.

Then imprison them or seize their property, pensions or welfare payments they don't fix their damage or pay for it to be fixed. I have always though the Law is an ass particularly in political cases, or should I say, cases where the motivation is claimed to be political.

[kenneal - lagger]

Extinction rebellion protesters acquitted by jury.

https://www.bbc.co.uk/news/uk-england-london-56853979

Despite the instructions of the judge.

Ordinary people joining the protests without actually going themselves. If there are many more cases like this will the police stop arresting people on protests?

[adam2]

BTW, I have been giving lessons in basic electricity/fuel/ physics to several local supporters. Nothing advanced, but still useful, not formal school type lessons but round table discussions.

Lesson one, now done, but follow up questions welcomed.

Difference between kilowatts and kilowatt hours, confirm that "a unit" of electricity is one kilowatt hour.
Explain that the mains voltage in the UK is nominally 230 volts, but averages about 240 volts most of the time in most places, but can vary from about 210 volts at the point of use up to just over 250 volts.
Explain that metering measures actual energy supplied and is not influenced by the voltage.

Also that DOMESTIC electricity meters take no account of power factor, and that almost nothing is gained by improving the power factor.

Discussion of relative loading of different appliances, explained that a high wattage appliance is fine if it does the job quicker or better, and if the electricity supply is sufficient.
No merit in a 1 kw kettle for example, unless the electricity supply is restricted. 1 kw kettle useful from a small generator or inverter for example, but pointless in most other situations.

Lesson 2, next week.
Different voltages and relative merits of different mains voltages.
Relative risks at different mains voltages.
Merits of AC versus DC.
Different battery voltages for off grid living, and for standby purposes. Merits of 12 volts, 24 volts, 48 volts, and 110 or 120 volt systems.

[adam2]

Lesson two.

Primarily about different utility voltages and different battery voltages.

Merits of lower voltages such as 120 volts in USA and of 127 volts in some other places. Cheaper and simpler installation. Earthing still a good idea but less important than at 220/240 volts.
Greater losses in cables unless thicker cables used at greater cost.
More transformers needed for lower supply voltage, greater capital AND running costs since many small transformers cost more to buy and to run than fewer larger ones.
Three phase supply briefly mentioned and relationship between voltages.
Single phase three wire supply, mentioned, common in USA, exists but much less common in UK.

Briefly mentioned many different supply voltages used in the past, and observed a general move towards 3 phase, four wire, at 230/400 volts in most places other than USA. Saudi Arabia to abolish 127/220 volts, other Arab countries to follow ?
127/220 volts ALMOST extinct in Europe.

Possible move toward 400/690 volt systems in industry.

Sensible limit as to distribution distance at different voltages, about one mile per thousand volts. "no law of man or nature" prevents greater distances, but a higher voltage is likely to be more sensible.
Also sensible limit to current being about 1000 amps, unless the distance is very short.

Moved on to battery voltages and merits of differing voltages according to size of system.

6 volts, obsolete for general use. Possibly worth considering for one or two lamps up to a few watts load. Gave example of such a system.
8 volts, even more obsolete !

12 volts= pretty much the standard in years gone by. Arguably still be best choice for small systems. Safer than 24 volts, very simple, good choice of equipment.only needs one battery. No shock risk. 12 volts can not sustain a continuing arc, unlike 24 volts. Sensible load limit about 200 watts.

16 volts-obsolete in general.

24 volts= increasingly popular for medium size systems. Almost no shock risk, significant fire risk without proper materials and workmanship. Good choice of equipment. sensible load limit one or two kw, unless used with an inverter.

32 volts- once popular in USA but now largely obsolete, limited choice of equipment.

36 volts- not common.

48/50/52 volts. Limited choice of equipment, primarily for larger inverter based systems. Borderline dangerous with regard to electric shock. Definitely dangerous as regards fire risk. Standard types of domestic light switch not recommended at this voltage.

110/120 volts- NOT DIY unless experienced. Special switches and socket outlets needed. SOME USA mains voltage equipment will work at this voltage.

220/240 volts . Definitely into dangerous territory. More applicable to community scale systems.

440 volts and up. Avoid domestically, this is utility scale stuff. Lethal.

[kenneal - lagger]

I have had a 300W 12V wind turbine sitting in the cellar for years because I can't work out how to get the power from the turbine to the battery store, a distance of about 30m including down the pole, affordably. The only way that I thought it could go is suspended along poles in the air but that causes a problem with an access. All the rest of my kit, about £6K+, which has been built up over about 30 years, is all 12V and I am beginning to wish that I had gone with 24V to start with. Ah! the benefits of hindsight!!

[adam2]

Two answers occur to me.

Option one, simply use very thick cable. A scrap dealer might have something suitable for the value of the copper, not the makers list price.

Option two, In what condition is your battery ? when a one is required go for a 24 volt battery with a center tap so as to obtain a 3 wire DC system.
Split the existing 12 volt loads between the two 12 volt circuits, and split the existing PV charging between the two halves of the battery.
Use the wind turbine to charge the whole 24 volt battery, presuming that it is multi voltage.

Dont forget to double check what is the output voltage of the wind turbine. Some are 110 volt three phase between the alternator and the control box, and then a regulated DC supply suitable for charging a battery. The 110 volt circuit can be extended as needed in modest size cable. very thick cable is only needed between battery and control box.

[kenneal - lagger]

The turbine is definitely 12V as I had to chose when ordering it and they rewired it from 24V.

With a 24V battery system set up as two 12V banks connected in series can you take a connection from the 0v, the negative, and from the 12V + to an inverter and then take a connection from the 12V - to the 24V + to the same inverter to double the Ampere hours available, Adam?