older/newer GCH radiator efficiency?

With respect it's not difficult to make silent fans. Obviously they don't move a lot of air per size, so a given flow requires large blades & if ducted, large ducts. That you've seen cheaper noisy ones tells us precisely nothing.

I don't understand why some people are just stuck on stupid.

It makes the point that fans can be silent. Sorry, I thought that was utterly & completely obvious.

NT

Heat. And as the rad cools, as it does at some point, you find that every single bit of electricity consumed has turned to heat.

If you said you were 100% stupid there's be no argument.

Come on, yet again, I invite you to tell us what else the lost energy turns into apart from heat. See if you can think of something.

Yes. Thermodynamic issues which generally prevent even theoretical

Perhaps very quite and mostly useless would be closer to the truth.

Yes big slower fans are quieter than smaller faster ones for the same air flow, but none are silent. If you are shifting a volume of air, you will get noise from that even without the fan... Ever heard the wind blow?

Yeah Nige, you would.

With 'respect' if you think broadcast companies etc go for cheap noisy ventilation fans in a proper studio installation, you are even more stupid than you first appear.

You don't understand yourself then? Only a fool talks about 100% efficiency with anything.

That's because you're deaf.

That is because it is not mechanically 'moved'. This thread was making more efficient radiators from some addition help to move the air. Do keep up.

Moving air is going to impinge on something solid; eventually.

wrong again

wrong again

noise ceases to occur when airspeed is low. And obviously most fans are not noise optimised. Even my first 1k rpm fan was completely silent.

If someone can't follow an elementary point... shrug.

Why do you keep calling me Nige?

NT

In my experience of only 2, and observations of a few others, broadcast companies typically know very little about science or physics, and when other companies offer them products lavishly praised they pick from those. They make routinely not the best choices. Fan companies, like any other copmany, of course are not normally building for top quality, when they say they are they normally build for relatively good quality with various cost cutting measures. Add on a nice markup, praise it to the skies and there you have a commercial product. The same pattern occurs in business sector after business sector.

I've invited you again and again to tell us what else the radiator produces than heat. You failed. And no, it still doesn't get hot enough to glow.

'Nothing is 100% efficient' is a good rule of thumb. Like any idiot you confuse oversimplified rules of thumb with actual reality.

NT

Obviously there are plenty of daily scenarios in which air moves but people don't hear it.

NT

You keep using "silent" without defining what you mean. So I suspect you are through the looking glass and playing Humpty Dumpty. Meanwhile the rest of us in the world where "completely silent" requires the absence of any acoustic waves - whether or not you can hear them with your particular ears at whatever distance you are listening. Good luck achieving that with a fan. And even if you define "silent" by reference to your ear at your distance, don't attach "completely" until you've checked what happens if you run 1,000 of the fans in the room at the same time.

There you have it then. A great business opportunity for you. Make silent ventilation systems for studios. And indeed everywhere - as I doubt many like the noise of air moving, or the bits needed to do this.

BTW, if you think broadcast companies know little about science or physics. you could do some simple research on just how many such things were invented and developed by the likes of the BBC and ITV. As well as the parent companies of recording studios. But that would show just how little you know about such things.

Are you really as thick as you appear? As a radiator heats, it expands. Where do you thing the energy needed for that comes from? Etc etc.

How long are you going to continue digging this hole for yourself?

Would that depend on your hearing? Or do you work to an average with everything? Like 100% ;-)

I'd guess you're bashing your head against a brick wall, Robin. Silently, of course.

Because of deafness.

The ear is not sensitive to the limit of possible hearing, unlike the eye. Moving air makes noise when it encounters an obstacle.

While you may be an expert in making noise in this group, care to tell us the relationship between air speed and noise? You make it sound a trivial engineering problem.

So you've not even read the thread yet want to chip in with another idiotic troll. Mmkay.

more idiot troll.

lol.

I've watched enough BBC to know how clueful they are. Behind the scenes sure they employ good people at times.

this was already addressed of course

how long are you going to play the idiot troll?

But you don't mention what other form of energy you think comes from the radiator other than heat. Another silly troll.

so you don't know what the truth is but are happy to make it up. I OTOH have made silent fans. You sir are a stupid troll.

already BTDT. So have others.

Yup. I've also observed the many days on which there is no wind noise, yet air still moves. And I've observed that you're being a stupid troll.

NT