Save Energy

[Less]

Which reminds me. Before anyone asks I think that I had better explain back EMF.

When a Direct Current is passed along a wire it creates a magnetic field around it. If another wire is passed through that magnetic field a current is induced in that wire. The same applies to an Alternating Current except that the magnetic field also alternates in that in one instant there is no magnetic field and one two hundredth of a second later it rise exponentially to maximum and in the next two hundredth of a second it falls exponentially back to no magnetic field and continues thus.

Whether the wire is moved through a magnetic field or the magnetic field is moved through the wire makes no difference, a current of lower value is still generated in that wire but it is 180 degrees out of phase with the original. However the wire carrying the initial current is also subject to the changing magnetic field and an opposite polarity current is generated in it. This current opposes and cancels out some of the original current.

So as an example, and please don’t take these figures literally, it is just an example to establish the principle. If a wire is carrying an alternating current of say 10 amps and it has a back EMF of 1 amp induced in it the overall effect is that only 9 amps flow. So to ensure that there are 10 amps available something like 11 amps would need to be generated at source. Thus the back EMF creates losses.

I don't think anyone would have asked.

You forgot to mention eddy currents (higher losses due to them which is why a solid iron core isn't used in A.F. and power transformers) ,
Off the top of my head I seem to remember that if the current was at 180 degrees it would actually cancel itself out therefore transformers would be of no practical use at all, but before we get bogged down in techno waffle and have to talk about phase shifts and vectors, that is only going to confuse and should not be used to baffle but always on a non technichal site such as this be put in it's simplest of terms.

 

[jambutty]

You are quite correct Less transformers do not use a solid iron core but I never said they did. They use a laminated soft iron core or the soft iron is powdered and (for want of a better expression) glued together to form a solid block. But there are different grades of soft iron and the better the grade the fewer eddie currents and thus fewer losses, with “MuMetal” being the best and most expensive. I spent some 20 years of my working life at Dynamo & Electrical Services making the darned things from little itty bitty ones less than one inch cube in size to huge beasts weighing in at several hundredweight.

The induced current in a wire is never anywhere near the value of the source current so cancellation is small but it is still evident. And that applies equally to transformers.

The bottom line is that up to 25% of the generated electricity is lost depending on how many times it is transformed from one voltage to another between the generator and the user. At around 5% per transformer and the same for transmission line losses it would only need two transformations from source up to the National Grid level and two down to user level to incur 25% losses.

 

[Mick]

I think these explain it better

 

[WillowTheWhisp]

I do my bit not to waste energy and if I want to run my PC, watch TV, run a washing machine etc it has got nothing to do with you. So stick your nose out!

If the Queen was a member of this site and she had seen the starting post of this thread would she have made a comment such as:-

"We do our bit not to waste energy and if we want to run our Floodlights to illuminate ones Palace it has got nothing to do with you. So stick ones nose out!"

Nice one Less. What's sauce for the Jambuttys of this world must also be sauce for the Queens surely.

 

[Busman747]

Dear jambutty,

In reference to your initial post, you are complaining that Buck Palace is being flood-lit between Dusk and Midnight. Am I correct so far?

Dusk to Midnight is presently around 6 hours. Is this also correct?

Office hours are generally accepted to be between 9am and 5 pm. Am I wrong so far jambutty?

So it would be fair to say that your complaint is that Buck Palace is using electricity outside of office hours and for an approx period of six hours in the evening.

Your complaint that I quoted you of using the words "office hours" is totally unfounded as it was my way of describing what I interpreted from your post.

- - - and to tell an Accywebber to "stick your nose out" on a forum that is there to discuss opposing views is just a tad rude do you not think?


BTW. "Stick your nose out" Is that a northern insult - or have you got the wording wrong? or maybe I have misquoted you on that

 

[jambutty]

In reference to your initial post, you are complaining that Buck Palace is being flood-lit between Dusk and Midnight. Am I correct so far?
Not quite Busman747. My complaint is that Buckingham Palace is floodlighting the building whilst the government is asking us to conserve energy.
Dusk to Midnight is presently around 6 hours. Is this also correct?
Yep!
So it would be fair to say that your complaint is that Buck Palace is using electricity outside of office hours and for an approx period of six hours in the evening.
No! That is not what I stated. My complaint is that Buckingham Palace is floodlighting the building whilst the government is asking us to conserve energy. It has nothing to do with when it happens.
Your complaint that I quoted you of using the words "office hours" is totally unfounded as it was my way of describing what I interpreted from your post.
Now if you read what I wrote instead of interpreting it, you might have grasped what I was stating.
- - - and to tell an Accywebber to "stick your nose out" on a forum that is there to discuss opposing views is just a tad rude do you not think?
Yup! But so was your If you feel so strongly about wasting electricity, why are you running your PC?

“Stick your nose out” is the opposite to “stick your nose in”. I have no idea where it originated and quite frankly I don’t care.

Now if you want to continue to split hairs, be my guest but as far as I’m concerned you will be talking to yourself.

 

[Bazf]

Ah busman you will probably lose karma if you are percived to be wrong or if you attempt to have a different point of view then our Ex pert.

 

[garinda]

Ah busman you will probably lose karma if you are percived to be wrong or if you attempt to have a different point of view then our Ex
pert.

Has he been demoted, to an ex-pert?

 

[WillowTheWhisp]

Was he ever a pert?

 

[jambutty]

What’s a ‘pert’?

If I was ever a ‘pert’ I am still a ‘pert’ therefore cannot be an ‘ex-pert.’

Thanks to the anonymous coward for the negative Karma and the message, “You can stick your nose out of this you rude little man.”

What’s the matter anonymous? Do you not have the courage to put your name to your comment?

 

[Bazf]

Sorry Should have been ex spurt, ex as in has been, spurt, a drip under pressure. If you can't work it out............

 

[jambutty]

So you were trying to be rude and insulting Bazf and failed miserably. Now I was awarded some negative Karma whilst being accused (anonymously) of being rude. So following that lead I will do the same, but not anonymously, when the system allows me to do so.

 

[Bazf]

Ok, you awarded negative Karma, well hey ho, it makes you feel better, I didn't but if I did I would have put my moniker on it. I also have an old father who is a cantankerous old git, I put up with him because like most retired old farts he knows everything and no one can disagree with him, I find most of your serious posting amusing and like most misimformed people very one sided. So take away all the karma you want old man, when the system allows you, and I will continue to to fight the good fight and if I feel like it, which is often, disagree with you. Just for your last post have a .

 

[Less]

So you were trying to be rude and insulting Bazf and failed miserably. Now I was awarded some negative Karma whilst being accused (anonymously) of being rude. So following that lead I will do the same, but not anonymously, when the system allows me to do so.

Please Jambutty change the record, you have said in other threads you don't believe in the karma system but every time it is used instead of ignoring it you start moaning about cowardice, anonimous etc,this is your thread why not try to keep it on track instead of making yourself appear petty to the very people that you are complaining about?

If someone gives you negative most of us don't care, and we don't want your excellent threads ruined by you moaning on about something that shouldn't bother a man of your mature and succinct view of the world.

 

[jambutty]

One day Bazf, if you live that long, you too will probably end up as a cantankerous old git and become a retired old fart that by then will know a lot more than the youngsters of the day.

However it saddens me to read that you “put up with your father” rather than have any affection for him.

I have no idea how old you are or the age of your father but the chances are that either him or his father and their wives sacrificed a lot just so that you could have the freedom to post what you like, within the bounds of decency, in English and live in a so called democracy. Your dad’s reward? To be put up with. Absolutely shameful!

All opinions are by their very nature one-sided Bazf. Do you expect people to argue all sides of a topic? What if they don’t agree with one side? Are they supposed to argue for something that they disagree with?

You fight your ‘good fight’ as you see it and I will continue to do the same but I won’t resort to name calling if I disagree with you.

Thanks you for your kind words Less. However I don’t care about the Karma negative or positive. What I do care about is the anonymity of some awards. Posts are not anonymous and a Karma comment is nothing more than a mini-post albeit only seen by the recipient. So why the shyness? Are people not prepared to stand by what they say or write? Obviously some are not.

 

[Less]

However I don’t care about the Karma negative or positive.

Oh yes you do or you wouldn't divert from your own thread to comment on it.

What I do care about is the anonymity of some awards.

If you don't believe in the system why should it matter how it is set up?

Posts are not anonymous and a Karma comment is nothing more than a mini-post albeit only seen by the recipient.

Perhaps the people that post anonymously are not as good a 'wordsmith' as you but this gives them a chance to comment on your thoughts, again a man of your intellectual stature should be able to forgive these lesser mortals their failings and continue to maintain the standard you have acheived without such comments effecting your flow of thoughts?

So why the shyness?

There you go someone shy trying to come to terms with it and you just blunder all over their feelings, 'shame' on you, they are surely to be encouraged rather than demeened, this could be their first step to coming out of their shell and you act without care or sympathy!

Are people not prepared to stand by what they say or write? Obviously some are not

Perhaps they feel that no matter what their response to you is they will be wrong? and rather than have you moan on about them in person they would just rather give you negative and watch you tear your hair out, it does seem to be your weak spot.

Can I again ask you, (as politely as I can), not to keep moaning on about something that (in your opinion), isn't worth a mention, You do tend to be very protective of threads that you start and yet as soon as something negative comes your way. you shoot straight off onto this minor tangent, (perhaps that is their plan), I don't like this thread I'll get him to change it, bang! they give you negative, you lose the plot, everyone else loses patience with you and the whole thing just travels around in circles?

 

[jambutty]

Perhaps the people that post anonymously are not as good a 'wordsmith' as you but this gives them a chance to comment on your thoughts, again a man of your intellectual stature should be able to forgive these lesser mortals their failings and continue to maintain the standard you have acheived without such comments effecting your flow of thoughts?

I don’t consider other people as lesser mortals Less - just those with an education that has been different to mine. Many can do a lot better then I can and some cannot. It’s the way life is. But thank you for the psychoanalysis of my character even though its way off the mark.

This thread is supposed to be about Saving Energy and it wasn’t me who pulled it off topic. So why don’t you get onto entwisi who started the wander and then chav1 and Busman747, plus a few others. I just responded to some of their comments because I was asked questions or the comments warranted answers.

But then I guess some people think that I’m not supposed to post what I think unless it happens to coincide with what they think.

 

[Less]

I don’t consider other people as lesser mortals Less - just those with an education that has been different to mine. Many can do a lot better then I can and some cannot. It’s the way life is. But thank you for the psychoanalysis of my character even though its way off the mark.

This thread is supposed to be about Saving Energy and it wasn’t me who pulled it off topic. So why don’t you get onto entwisi who started the wander and then chav1 and Busman747, plus a few others. I just responded to some of their comments because I was asked questions or the comments warranted answers.

But then I guess some people think that I’m not supposed to post what I think unless it happens to coincide with what they think.

You are too complex for me to try to work out the too-ings and fro-ings of your mind, (please do not imply what isn't there).

Yes the thread is supposed to be about saving energy and in two posts I have mentioned that perhaps you should try to get back on track,

Thanks to the anonymous coward for the negative Karma and the message, “You can stick your nose out of this you rude little man.”

I am correct in saying this is something you posted in this thread? It seems like a wander to me and that is what I have been answering, with I hope in each post a hint that such comments that you did quote should be ignored and that you should reposses your thread and get it back on topic?


Oh, you mean Busman747 and entwisi?

addendum Oops how silly of me I've misquoted your quote, please ignore comments about entwisi and I will start all over again with a fresh post to correct this post if you would like me to?

Well entwisi did say in his opinion the queen can afford it, (meaning the floodlights), so thats on topic isn't it?

Busman747? Poor innocent Busman 747, gave you an honest opinion and got told to stick his nose out!

Why post if you don't want people to reply? Replies such as

So stick your nose out!

could put people off talking with you and might scare them into anonomous negativity!

Well I could chat with you all day but I've just notice I've left my stairs light on, so I musn't linger while there's energy to save, talk again soon, perhaps on some other topic, one that you don't tend to wander from perhaps?