Solar PV performance review

[ToughButterCup]

8 hours ago, SteamyTea said:

I am watching paint dry (literally), [...]

 

I wonder whether that is true of all of us, all the time?

In the same way as we are all watching glass flow (I'm told)

[ProDave]

4 minutes ago, AnonymousBosch said:

 

I wonder whether that is true of all of us, all the time?

In the same way as we are all watching glass flow (I'm told)

No I am different, I am watching grout dry today.

[Ed Davies]

2 hours ago, AnonymousBosch said:

In the same way as we are all watching glass flow (I'm told)

 

You're told unreliably, mostly.

[scottishjohn]

40 minutes ago, Ed Davies said:

 

You're told unreliably, mostly.

very reliably --glass flows -look at windows in a very old house will be thicker at the bottom 

[PeterW]

30 minutes ago, scottishjohn said:

very reliably --glass flows -look at windows in a very old house will be thicker at the bottom 

 

It’s rubbish. It’s due to how the glass was made and blown, and it was uneven to start with. 

[Ferdinand]

7 hours ago, scottishjohn said:

very reliably --glass flows -look at windows in a very old house will be thicker at the bottom 

 

AIUI they put the thick edge at the bottom when installing.

 

Indeed, you sometimes (I am told ?) get ones that are thinner at the bottom that have flowed upwards. Or could perhaps been installed upside down.

 

Lived in a house that was still in possession of many original Georgian panes, but I admit I never went round checking any. I am sure Jeremy has a way of measuring the thickness of a Georgian window with a few cornflakes and some bits from a Standard Vanguard, but I was not in possession of a micrometer that would reach round the adjacent window frame. 

 

F

[Jeremy Harris]

As others have said, glass is not a liquid and doesn't flow once cooled at all.  Old window glass was never flat and uniform, we didn't get truly flat glass for use in normal windows until about 60 years ago, when float glass was invented.  Before that date glass was often imperfect and of uneven thickness, and this uneven glass was usually, but not always, installed with the thickest edge facing down, as @Ferdinand mentions.  Our first house had windows that had been installed in 1903 (after a fire) and the glass in those was uneven and slightly distorted, a consequence of the cylinder method that was used to make window glass.

 

If further proof was needed that the "glass is a liquid" story is a fallacy, then a look at very old glass artefacts will quickly make the point.  There are surviving glass bottles from the Roman period and none show any effect from gravity distorting the glass after they were made.

 

 

 

[Ed Davies]

11 hours ago, scottishjohn said:

very reliably --glass flows -look at windows in a very old house will be thicker at the bottom

 

Hmm, shall I believe what looks like a well-researched article in Scientific American which specifically counters this point or…