Poll: Heating Concepts

[ebee]

Contra that with virtually no one else in the world uses them.

I am, not saying you are wrong I am just wondering why, I do not know the answer and I do want to know it.

 

[EFLImpudence]

At first sight, I would expect the heated water to rise to the top of the 'column' of water that already existed,

Ok.

with the level of the top of that 'column' only rising very slightly because of 'expansion' (lower density of heated water)

It rises because denser cooler water is entering the bottom and pushing it up because of gravity but then some not quite so hot water is heated to continue the process..

- i.e. I would not expect it to 'pump out' and need to be replaced with cold water from below. Anyway, we'll see ('in due course' )

I don't think 'pumped out' is a correct term to use.

The hot water has to go somewhere and the only place is up and across to the cylinder until the heating stops.

 

[Harry Bloomfield]

Contra that with virtually no one else in the world uses them.

I am, not saying you are wrong I am just wondering why, I do not know the answer and I do want to know it.

But they are in use world-wide, in industrial and commercial environments, though I agree only the Irish have adapted them to domestic use. Why the Irish might use them, I have no idea.

 

[blup]

Or, the heated water might just do what hot would naturally does, and rise out the top, at the same time drawing cooler water in from the bottom.

What if there is no draw on the water?

 

[JohnW2]

The hot water has to go somewhere and the only place is up and across to the cylinder until the heating stops.

As I keep saying, it does not have to 'go anywhere'. The hottest water will rise to the top of an existing volume of water (as within a DHW cylinder when no hot water was being drawn) without more than a trivial increase in the volume (hence very little 'extra water' to 'go somewhere').

Whatever, I think we've exhausted all the speculative discussion based on theory, so I'm essentially going to wait until I can provide some empirical answers.

 

[JohnW2]

What if there is no draw on the water?

Quite so.

 

[EFLImpudence]

As I keep saying, it does not have to 'go anywhere'.

Yes, it does.
It is now less dense than the water in the cylinder, therefore the more dense will make its way into the Willis.

The hottest water will rise to the top of an existing volume of water (as within a DHW cylinder when no hot water was being drawn) without more than a trivial increase in the volume (hence very little 'extra water' to 'go somewhere').

No.
The densest water will sink to the bottom and something has to make way for it.

Whatever, I think we've exhausted all the speculative discussion based on theory, so I'm essentially going to wait until I can provide some empirical answers.

We have.
You will not accept what happens.

As I said, you do not appreciate the gravity of the situation.

 

[JohnW2]

Yes, it does. ... it is now less dense than the water in the cylinder, therefore the more dense will make its way into the Willis.
No. The densest water will sink to the bottom and something has to make way for it.
We have. You will not accept what happens. As I said, you do not appreciate the gravity of the situation.

...

Whatever, I think we've exhausted all the speculative discussion based on [perceived] theory, so I'm essentially going to wait until I can provide some empirical answers.