[Pil-pc-oceania] [pil-pc-oceania] just an aside on induction cooking

Mon Mar 17 21:55:07 EST 2008

Hi David,

I just made a cuppa and did a little experiment using a powermeter...

boiled 1lt of water in a Breville kettle - took 2mins - consumed 133watts
boiled 1lt of water in a saucepan on induction - took 2.5mins - 71watts

As far as efficiency goes - http://en.wikipedia.org/wiki/Induction_cooker

"[induction cookers] consume half as much electricity as
electric-resistance elements and are more efficient in heat transfer,
achieving an absolute efficiency of 84% compared to a typical 40% for
a gas cooker. According to CEG Electric Glass Company, "[Induction
cooking] power savings of 40-70% are realistically achievable in
comparison to conventional cooktops." CEG Electric Glass Company also
states induction cooking has an efficiency rate of 90%, while Electric
and Gas have efficiency rates of less than 50%"

If I turn mine on flat-stick it draws 1.7kW, which is less than half a
standard electric cooktop. They're very popular in apartments in
China. Where, if all at once, everyone decided to boil water for
noodles, you'd black out your building :)

Since there's way less waste heat, personally I've noticed a reduction
in "sweaty chef syndrome" from toiling over a stovetop on a hot Sydney
night! Once it's turned off, the only thing left hot is the cookware &
dinner.

Not saying their perfect. There's probably lot's of short range EM
radiation generated.
But people also use microwave ovens.

Your mileage may vary, Andrew.

On 17/03/2008, David Arnold <arnold.vt at gmail.com> wrote:
> are these induction cooktops very efficient, Andrew?
>
>
> On 17/03/2008, Andrew Leahy <alfski at gmail.com> wrote:
> > a good read kerry.
> >
> > small aside, green-powered electric induction cooking is da bomb!
> > you can pickup one or two-pot portable induction cooktops relatively cheap at decent asian supermarkets.
> >  to me the instantaneous heating and temperature control is just as good as gas, and safer.
> >
> > andrew
> >
> >
> >
> > On 17/03/2008, Kerry Dawborn <kj.dawborn at bigpond.com> wrote:
> > >
> > >
> > > Hi Folks, thought you might find this message which was posted on the Public Transport Users Association list, interesting... It gives a detailed positive view of the potential future, and as writer Matthew Wright says, we already have the know-how to do this.....
> > >
> > > Highly recommended reading!
> > >
> > > Kerry
> > >
> > > -------- Original Message --------
> > >  Subject:  [ptua] ABC opinion: Can we live with zero emissions?
> > >  Date:  Mon, 17 Mar 2008 11:51:26 +1100
> > >  From:  mediamonitor at ptua.org.au <mediamonitor at ptua.org.au>
> > >  Reply-To:  ptua at yahoogroups.com.au
> > >  To:  ptua at yahoogroups.com.au
> > >
> > >
> > >
> > >
> > >
> > >
> > > http://www.abc.net.au/unleashed/stories/s2186610.htm
> > >
> > > Can we live with zero emissions?
> > >
> > > Matthew Wright
> > >
> > > On February 21, the interim Garnaut Climate Change Review was
> > > released. It states: "It is in Australia's interest for the world to
> > > adopt a strong and effective position on climate change mitigation."
> > >
> > > Professor Garnaut also mentioned scenarios including what it would
> > > take if Australia was to be fair to developing countries and carry its
> > > historical burden to have a 50 per cent chance of meeting the long
> > > established EU goal of keeping warming under two degrees. To do this
> > >  he suggested we would have to reduce greenhouse gas emissions 90 per
> > > cent by 2050 - effectively, it's a zero emissions target.
> > >
> > > So what would life be like with zero emissions? Is it even possible?
> > >
> > > Yes it is, and here's how it looks...
> > >
> > > It all starts at home
> > >
> > > If your house was built after 2014, then you don't require any space
> > > heating or cooling as your house has been engineered to include
> > > passive solar design, as well as with enough thermal mass storage like
> > >  concrete or rammed earth to get you warmly through many days of
> > > continuous cloud cover.
> > >
> > > Your water is heated purely by an evacuated tube solar system in the
> > > summer months and boosted by an electric heat pump in the winter
> > >  months. Lighting is vivid and dimmable, using Light Emitting Diodes
> > > (LEDs), which use five per cent of the electricity consumed by today's
> > > lighting.
> > >
> > > There is no more gas in use, so if your house is of pre-2014 vintage
> > >  it has been retrofitted to 8-star. The gas cooktop is gone, replaced
> > > by the European style induction cooktop, which cooks faster and gives
> > > better responsiveness than gas.
> > >
> > > Our electric ovens are triple glazed - you can put your hand on the
> > >  front while the thermostat is up and not get burnt.
> > >
> > > Our televisions are Organic LED (OLED) display based. Sony has already
> > > released one and they use 10 per cent of the power of today's LCD
> > > flat-panel televisions.
> > >
> > > Computers use the technology of the latest laptops with OLED displays
> > > and consume around 80 per cent less power than today's desktops.
> > >
> > > Water collected from our roofs provides 100 per cent of our water.
> > >
> > > Getting energised
> > >
> > > Brown coal use ended in Victoria in 2014 and black coal was phased out
> > > in 2016 in the rest of the country.
> > >
> > > By now, wind power already contributes 40 per cent of total power
> > > generation and we see rapid growth in concentrating solar thermal
> > >  plants (these boil water to drive steam turbines to make electricity).
> > > Gas was used to repower coal plants during the transition to a zero
> > > emissions energy sector, but by 2020 gas has been phased out totally.
> > >
> > >  For energy security, reliable baseload and peak power demand, we use
> > > pumped hydro, compressed air storage, high temperature solar hydrogen
> > > storage, ammonia thermochemical storage and Phase Change Salt thermal
> > > batteries as well as flywheels and super-capacitors.
> > >
> > > In 2020, geothermal technology takes off, allowing Australia to
> > > continue exporting energy based products such as aluminium.
> > >
> > > Travelling and eating
> > >
> > > We get around by traditional bicycle, fully enclosed electric assist
> > >  bicycles, public transport and private cars.
> > >
> > > Fast and frequent light and heavy rail account for 70 per cent of
> > > travel. Just like in the 1930s, trams and trains are now within 500
> > > metres of most homes in cities like Melbourne and Sydney. By 2020, a
> > >  massive rail network using the latest engineering is rolled out across
> > > our cities and major urban centres.
> > >
> > > The streets are clean and there is no local air pollution in our cities.
> > >
> > > Asthma rates and air quality related mortality fall dramatically as a
> > >  consequence.
> > >
> > > The vehicle fleet is a combination of electric vehicles (60 per cent)
> > > and plug-in hybrid electric vehicles (40 per cent). Congestion charges
> > > and road taxes motivate most people to use public transport.
> > >  Intercapital trips are on the $100 billion 400km/h fast rail system,
> > > which links Perth, Melbourne, Cairns and Darwin.
> > >
> > > International air flights are costly and are used to get from Darwin
> > > to Singapore. For trips to Europe or Africa, you take the Trans Asian
> > >  Fast Train which links to the African Fast Rail. To get to the US, you
> > > take the Fast Train to Haerbin in China, then fly to Anchorage in
> > > Alaska eliminating all long haul flights. The only other flights are
> > > to small remote islands such as New Zealand and Iceland.
> > >
> > > Shopping centres have been upgraded for energy performance; slashing
> > > their power consumption by 80 per cent. As you enter any commercial
> > > centres you'll notice the addition of air-locks (two sets of doors) to
> > >  keep the heat out or in.
> > >
> > > Energy used for production is listed on all foods, which are taxed
> > > based on their total life cycle energy input. Thus, vegetarian dishes
> > > are more popular, with the average family eating meat less than once
> > >  or twice a week. Freight is almost exclusively done by rail, with
> > > shipping containers racing around the city on the tram network.
> > >
> > > Waste is expensive and we all have a compost bin. Community
> > > food-producing gardening has become a popular pursuit and means our
> > >  cities import 50 per cent less food from rural areas.
> > >
> > > Entertainment is of course zero carbon, with the lights at the MCG
> > > being replaced by an array of thousands of high power LEDs.
> > >
> > > Farming is predominately organic. Soil carbon is also big business.
> > >
> > > Carbon dioxide is actually pulled out of the atmosphere by a process
> > > developed by the ancient South American Mayans called Bio Char. This
> > > involves cooking crop waste in the absence of oxygen and then using
> > > the synthetic gas to make biofuels for our plug-in hybrids and farm
> > >  machinery. The by-product is the char, which takes carbon out of the
> > > atmosphere and even increases soil fertility. Farmers are paid for
> > > this, with the aim to return our atmospheric carbon to the pre
> > > industrial level of 270ppm.
> > >
> > > Forests stewardship is rewarded. Reforestation with indigenous species
> > > becomes a new land use, which corresponds with the reduced farming
> > > footprint of a more vegetable based diet.
> > >
> > > Recycling is about closing the loop. Usually 95 per cent of any
> > >  product that comes to the end of its life after reuse is recycled.
> > >
> > > Mining and construction now predominately use electric vehicles and
> > > tools. Consequently, according to the unions, life expectancy of blue
> > > collar workers now exceeds that of the white collar work force. The
> > >  Unions are also happy about how quickly the renewable energy industry
> > > has grown to over 100,000 workers.
> > >
> > > Materials are taxed according to their total life cycle, which means
> > > if management plans are not in place for mine tailings and industrial
> > >  wastes, the costs are prohibitive, thereby promoting alternative
> > > materials.
> > >
> > > And the best bit?
> > >
> > > All the technology and know-how that was used to achieve this was
> > > commercially available at scale in 2007. I think we must make this
> > >  change much sooner than 2050.
> > > __._,_.___
> > > Messages in this topic (1) Reply (via web post) | Start a new topic
> > > Messages | Files | Photos | Links | Database | Calendar
> > > Public Transport Users Association - www.ptua.org.au
> > >
> > > Opinions posted are the author's own.
> > >
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> >
> > --
> > Fact: To manufacture a 3 tonne car requires 50 tonnes of raw material.
> > Fact: In your lifetime you will eat 50 tonnes of food and produce 3 tonnes of poo :)
> > _______________________________________________
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> --
> David Arnold
> Permaculture Designer
> 4446 Murchison Rd
> Violet Town VIC AUS 3669
> 03 5798 1679
> arnold.vt at gmail.com
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>

-- 
Fact: To manufacture a 3 tonne car requires 50 tonnes of raw material.
Fact: In your lifetime you will eat 50 tonnes of food and produce 3
tonnes of poo :)