"William Gothberg" wrote in message
news
On Sat, 29 Dec 2018 14:56:26 -0000, Andrew Gabriel
wrote:
In article ,
Bill Gill writes:
On 12/29/2018 7:43 AM, William Gothberg wrote:
Shouldn't we have faster microwaves by now giving out a few kW? They
were invented decades ago.
Higher powered microwaves would require higher powered electric
outlets, probably 220VAC (in the USA).
Also it is questionable whether higher powered ovens would be
practical for use. Getting warming times down to a couple of
seconds might not be a good idea. More speed is not always better.
Most commercial microwave ovens are higher power - typically twice
that of a domestic oven (they often use a pair of magnetrons).
We have them in the office kitchen areas (I think they are 2kW).
One problem is that retail food products do not state cooking
times in commercial microwave ovens - we have warnings posted on
the ovens that they are much more powerful.
Is the average person not able to divide by two?
It isnt that simple with some food because with some
food the microwaves are absorbed by the outer layer
and the inside is heated by conduction.
Also, not all food can
be heated faster - often heat conduction is still a critical part
of the process, and the ability of food to conduct heat limits
the power input some food products can absorb without burning
whilst other areas are still cold.
Then the oven needs to have a more even waveform.
It isnt the evenness of the waveform that matters when
the outer layer of the food absorbs all the microwaves
and the inside is heated by conduction.
There's no problem with standard socket outlets in most countries.
In Europe and many other countries outside America, standard sockets
are designed to provide 3kW or 3.5kW (depending on country).
Many domestic microwaves in Europe are combination ovens with
convection, fan, and infra-red (grill) heating too, and often
run at 2.5kW when using combination heating (with a 1kW magnetron).
In a domestic environment, combination heating is generally more
useful than simply a more powerful microwave.
Not when I want to heat something in 2 minutes, conventional heating won't
even get going in that time.