In article ,
whisky-dave wrote:
On Wednesday, 29 November 2017 17:06:57 UTC, T i m wrote:
On Wed, 29 Nov 2017 08:50:01 -0800 (PST), whisky-dave
wrote:

On Wednesday, 29 November 2017 16:32:58 UTC, T i m wrote:
On Wed, 29 Nov 2017 13:38:10 +0000, Andy Burns
wrote:

whisky-dave wrote:

What I don't understand is why a 1.3KW heater would be better
than a 2KW at giving out heat.

It *might* be better, if. e.g. the 1.3kW can operate at 100% duty
cycle, but the 2kW keeps hitting its overtemp stat and operates on
less than a 65% duty cycle.

The other thing that came to mind is that he would probably get more
heat out of the radS with them all on.

what if we ran it at 240V rather than 215V or 202V ?

What do you think?

I think it would make it a pooreer heater due to this cycling you refer
to. If we ran it out a lower votage the duty cycle would increase to a
higher percentage which you claim is bester.


would it be better or worse at providing heat. ?

What do you think?

So what is the optimium volage for a 2KW heater ?

What do you think?

I would hope that it is the voltage it has been designed to work on and
that is what they call the operational voltage but that of course depends
on other factors.


(and potentially maintaining) the 1300W element than with them all
trying to run both (at ~2kW total) because of the voltage drop from
the crap power supply.

So run it at 110V then it is highly unlikely it'll NEVER cut out.

What do you think?

I doubt it would ever reach the point where the overheat protection is
applied.


But if it does.. back to the 9V battery so it definanlty won't ever
overheat.

What do you think?

it's would depend on the battery whether it could, but I don't believe
the heater would ever go into it's 'cycle' as you call it.

I also think that runnin git at about 240V of possible would make it less
efficiant than running it at 202V



And with that supply he'll probably be getting as much heat out of
the ring main as he will the heaters themselves. ;-)

didn;t seem to be the case afer a couple of hours.

Like you, it was a joke mate. ;-)

and thr biggest joke is someone claiming that 240V is the correct voltage
to apply to a heater that says it's operational voltage is 230V.

I took the tester home last night and I too got a reading of 238-239V
went down to 237-8 when boiling my kettle. Even the 51Hz went down to
50Hz but then again I don't think such small changes mean much as the
unit samples at about twice per second.


If your test meter thought that you boiling a kettle dropped the mains
frequncy from 51Hz to 50Hz, then it's a very strange meter.



Cheers, T i m

--
from KT24 in Surrey, England