Microwaves: myths and reality

[Christophe]

Funny what is the "sensor" that you used? (I go for a coil and 1 ammeter)

[delnoram]

Funny what is the "sensor" that you used? (I go for a coil and 1 ammeter)

Uh, you're not looking on the bright side

[nialabert]

Well considering what is on the photo it was not far either.

[delnoram]

[

Well considering what is on the photo it was not far either.

C not wrong, a shunt + a galvanometer, I had not read that from this angle

[Other]

Hello,
It looks strangely like the device used to measure radiation from radio antennas

A simple loop with an inserted and microamperode diode
with this we find, depending on the length of a 1/4 or 1/2 wave whisk, exactly the breaking point.

In many radio stations the transmission is not done directly in the antenna that passes by a coupling two loops of wire close to close are used for coupling.
A simple turn or two with a diode and Fluck also do the trick to measure a high frequency leak.
Andre

[hic]

This topic follows on from the following topic on the nature, effects and use of microwaves.

laboratory-econological / estimate-of-return-to-the-oven-microwave-t2365.html

hi Christophe

summary: why the microwave has such a poor performance

And if the problem were common to the energies diffused
by radiation?
In particular, the microwave which is 100% radiation

In fact, the radiation heats up at a distance and anything,
while convection only heats what is in contact with it
or nearby.
(hold a double tautology, I beat my record )

I have to stop using the microwave !!
Stay more than Induction!

about the kettle test?
was it thermally insulated?
87% of course it is isolated! (but I have not seen)

an insulated kettle is the best in energy saving!
Generalized system for cooking

the difference is disgusting!
you are just right, 87% is the waking dream

[hic]

Hi christophe

And the Kettle? ?
This is the continuation of this forum closed for technical reasons. March 26 Sep 2006
Performance Estimation of a microwave
laboratory-econological / estimate-of-return-to-the-oven-microwave-t2365.html
****************
I summarize :
Overall microwave oven "heating" efficiency: 167/360 = 46,4%! Gloups ...

Global microwave oven "heating" efficiency: 162/374 = 43,3% ... or nearly 7% (relative)
of difference with the 1st measurement. It would therefore be very desirable that this test be carried out by someone else ...

Overall kettle "heating" efficiency: 305/353 = 86,4% ...

A kettle has a yield 2 times higher than a microwave!

_________________________________________________________________________________

the performance of the microwave oven is normal,

**** it is a radiation (therefore dispersive) which balances 2/3 the sheet and 1/3 the water ****

opposite, the kettle
it's confinement in a small volume, small mass,
convection therefore little dispersion.

(I expected leaks greater than 14%
(hence the thermos bottle) each has its own problems)


Isn't it obvious that the kettle is the TOP!

Where is the problem ? 14% heat leak is not enough?
Yes ! is it anti-intuitive?
but you are the first who made this type of measurement, we are not used to it. :-)
Besides, it's secondary.

Probably the autonomous cooking systems have the same profile,
(I thought about it, now it's almost safe)

so see - autonomous cooking:
steaming
Kettle
autonomous oven (like a large fan-assisted salad bowl, without insulation)
what else ?

their advantages:
less mass to heat.
smaller volume.
integrated resistance
what else ?

note. my parents used a small oven in addition to the big one.

"The kettle", you did an excellent off topic, which you should continue. :-)

goodbye Hic