In article ,
whisky-dave wrote:
On Thursday, 30 November 2017 11:39:36 UTC, charles wrote:
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.

You don't understand much about meters do you. This is a two digit
display so it shows an average over time. So all it can display 49Hz 50Hz
51Hz etc...

so if the freuency is 50.5Hz it's display 50 for a second then 51 for a
second. At home and work it does the same although at work is only
displays 51 for about 1 in 5 or so seconds.

The mains frequency doesn't change like that. And it rarely gets to 51.5Hz
except occasionally in the middle of the night to make up for a spell of
49.5 during the day.

--
from KT24 in Surrey, England