On 07/05/2021 20:58, Rod Speed wrote:
Fredxx wrote
Rod Speed wrote
Fredxx wrote
Rod Speed wrote
Fredxx wrote
Rod Speed wrote
Fredxx wrote
Rod Speed wrote
Fredxx wrote
Rod Speed wrote
Fredxx wrote
Rod Speed wrote
Robin wrote
jon wrote

What is this nonsense, heat is dissipated by radiation,
convection or conduction so how come efficiency becomes a
problem.

As I think I said the last time this came up, my physics
is nowhere near good enough to decide "by inspection"
whether a vertical or horizontal radiator is better at
transferring heat to a room.

Yes, you clearly have that problem. Plenty of us dont.

I don't know why you say that,

Because its true ?Â* Novel concept I realise.

as the chimney effect can sometimes be very good at
providing a good airflow.

They both have that. The difference is that the
horizontal radiators have the air moving over
much less of the radiator so the radiator has
more cold air moving over it and so you will
see more heat moving out of the radiator
into the airstream.

So at first sight it's not obvious which orientation is best.

Only for those who dont have a clue about the basics.

Only those with hindsight will think differently.

Wrong.

And (like some others)

Who have the same problem.

I saw too many /known/ unknowns - e.g laminar flow?
temperature of air exiting top? chimney effect? - quite
apart from the possible unknown^2

None of that matters. What matters is the vertical distance.

There is no chimney effect with a radiator.

The gap between the radiator and the wall and radiator
height will determine air speed over the radiator.

But that isnt different with the two types of radiator.

What matter is the distance that the cold air at the bottom of
the radiator moves over before it gets to the top of the
radiator.

If you think differently, please feel free to cite an
explanation why this isn't the case.

Just did. And dont need a cite, just an explanation.

You haven't explained why a larger temperature difference
within an enclosed space such as a flue or the space around a
radiator won't create a bigger draught when we know the
opposite is generally true.

This paper for instance:
Â* http://cit.edu.ly/wp-content/uploads/2018/02/15-091.pdf

University of Zawia, hardly one of the world's great universitys.

A preferred reference over one individual whose chosen
speciality is claimed to be chemistry.

Another of your bare faced lies. Your trademark.

My trademark is to cite the source of my accusations.

You clearly didnt with that allegation just above,
you pathetic excuse for a lying bull**** artist.

I did,

Everyone can see for themselves that you didnt.

just you don't like the fact

No such fact.

or remember saying it.

I never said that.

You confirmed you were a chemist in a thread titled "Ethanol".

I did nothing of the sort, you pathetic excuse for a lying bull****
artist.

And you provided no cite for that lie either.

No lie, just senility on your part:

We'll see...

Â* https://www.homeownershub.com/uk-diy...-3102366-3.htm

and I thought you had a chemical background?

Thats not saying I was ever a chemist, ****wit.

No, but it was what you said. On an even earlier thread you eluded to
being a chemist,

No I did not.

hence my comment.

Which was another of your lies.

Are you now saying you failed your physical chemistry research degree?

My BSc did indeed major in chemistry.

My research degree was in physical
chemistry and involved no chemistry,
only electronics and computing.

Then you were had with being offered a physical-chemistry course.

It wasnt a course, it was a research degree.

So you were had.

I can read, too.

And they only use aspect ratios up to 2 and no verticals, so
none of that paper is relevant anyway.

It's infinitely better than any cite you've made to backup your
claims.

No cite required with the basic physics at the front of the
radiator which is where most of the heat comes from and
it isnt a claim, its a fact with the length of the path of the
cold air from the bottom of the radiator, you pathetic
excuse for a flagrantly dishonest lying bull**** artist.

It is a fact that the aspect ratio of a radiator as well as the
height of the room vs radiator heigh determine the efficacy of a
radiator.

The aspect ratio is covered by the terms horizontal and vertical
with the radiators being discussed, you pathetic excuse for a lying
bull**** artist.

No BS,

Nothing but mindless pig ignorant bull****.

a well reasoned argument

More bare faced lies. You cant even manage to
work out that that paper you waved around is
actually discussing the gap between the radiator
and the wall, not how effectively the front of
the radiator towards the room is heating the air
convecting up the front of it which is the main
way in which the radiator is heating the room.

To you facts you can't counter

I did counter that claimed fact, you lying bull**** artist.

You didn't with any substance. In the end you admitted that wide is not
always best.

you can't answer except with abuse.

Everyone can see for themselves that you are
lying thru your ****ing teeth, as you always do
when you have got done like a ****ing dinner,
as you always are. Your trademark.

Quite, everyone can see the article and can see wider is not always
better.

I never ever said that wider is always better,
you pathetic excuse for a lying bull**** artist.

Backtracking now. Then we are in agreement.

In fact I actually said the exact opposite and you carefully
and flagrantly dishonestly deleted that from the quoting.

So you agree that wider is not always better. Great.

But wider vs taller isn't always an optimum choice.

More drivel with the radiators being discussed,
you pathetic excuse for a lying bull**** artist.

Quite, the paper was discussing aspect ratios of 0.5 to 2.

But the vertical radiators being discussed
are well outside that, ****wit.

You made an unqualified statement

Like hell I did, you flagrantly dishonestly deleted
the qualification that was right after that sentence
from the quoting. And since this lying **** is the
best you can manage, here goes the chain on
the rest of your lying **** and flagrant dishonesty
you always end up with when you have got done
line a ****ing dinner, as you always are.

There was no cite of an article saying that wider is better. Anyway,
since you have backtracked and agree there is an optimum.