guide



Keep a Diesel in the Shed


A Diesel in the Shed.

You can have your solar panels
and your turbines on the hills;
You can use the warmth of sunshine
to reduce your heating bills.

You can dream you’re self-sufficient
as you weed your vegie bed;
As long as you make sure to keep
A diesel in the shed.

When I was a kid on a dairy farm in Queensland, we relied on green energy – horses and human muscles provided motive power; fire-wood and beeswax candles supplied heat and light; windmills pumped water and the sun provided solar energy for growing crops, vegies and pastures. There were no refrigerators – things were kept cool by evaporation of water in a Coolgardi safe. Cold water for drinks came from a water bag hanging in the shade near the back steps. We had no hot water systems – we bathed one after another in warm water heated in a kettle on the wood stove. The only “non-green” energy used was a bit of kerosene for the kitchen lamp, and petrol for a small Ford utility. We were almost “sustainable” but there was little surplus for others. Labour was cheap and food was expensive.

Our life changed dramatically when we put a thumping diesel in the dairy shed. This single-cylinder engine drove the milking machines and an electricity generator which charged 16 lead-acid 2 volt batteries sitting on the veranda. This 32 volt DC system powered a modern marvel – bright light, at any time, in every room, at the touch of a switch. This system could also power Mum’s new electric clothes iron as long as someone started the engine for a bit more power.

There were no electric self-starters for diesels in those days – just a heavy crank handle. Here is the exact model which saved us from a life of dairy drudgery, kerosene lights and Mother Potts irons:

See and listen: https://www.youtube.com/watch?v=itxY98A8wHQ

But all that effort, noise and fumes were superseded when every house and dairy got connected to clean silent “coal power by wire”, and coal was used to produce coke for the new slow-combustion stoves. Suddenly the trusty “Southern Cross” diesel engines disappeared from Australian sheds and dairies, AGA coke-burning cookers displaced the old smoky wood-burning stoves in the kitchen, and clean-burning coal gas replaced wood stoves and dirty open fires in the cities.
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Why Wind Power does not Greatly Reduce Consumption of Hydrocarbon Energy


The problem with wind power is that electric utilities have to be prepared at any time for their power production to just stop on short notice. So they must keep fossil fuel plants on hot standby, meaning they are basically burning fuel but not producing any power. Storage technologies and the use of relatively fast-start plants like gas turbines mitigates this problem a bit but does not come close to eliminating it. This is why wind power simply as a source contributing to the grid makes very little sense.

Read More:

http://www.coyoteblog.com/coyote_blog/2017/04/why-wind-power-does-not-greatly-reduce-fossil-fuel-use.html

https://www.masterresource.org/hawkins-kent/wind-solar-systems-i/



Battery Baloney


Playing Snakes and Ladders with Australia’s Electricity Supply.
By Viv Forbes & Helpers

Every day some green energy promoter or a battery salesman tells us how green energy with battery backup will supply Australia’s future electricity needs.

A battery stores energy. Energy can be stored using lead-acid, nickel/cadmium, lithium, molten salt, pumped hydro, hydrogen, flywheels, compressed air or some other smart gizmo. But NOT ONE battery produces new energy – they simply store and discharge energy produced by other means. They all deliver less energy than they consume. Moreover, to manufacture, charge, use and dispose of batteries consumes energy and resources.

The idea of producing reliable grid power from intermittent green energy backed up by batteries looks possible in green doodle-diagrams, but would be absurdly inefficient and expensive.

Solar works a Six hour day

Consider a solar panel which is rated to collect say 100 units of energy per day at full capacity, in full mid-day sunlight, with a clean panel, properly aligned to face the sun.

No solar energy arrives overnight and only minimal amounts arrive during the three hours after dawn or before dusk. That means that significant solar energy can only be collected for about 6 hours per day, providing it is not cloudy, raining or snowing. No amount of research or regulation will change this – the solar energy union only works a six-hour day and takes quite a few sickies. So instead of feeding 100 units of energy per day into the grid, at best, the panel supplies just 25 units.

Can the addition of batteries give us 24/7 power from solar?

To deliver 100 units of energy in 24 hours will require an extra 75 units of energy to be collected, stored and delivered by the batteries every sunny day. This will require another three solar units devoted solely to re-charging batteries in just 6 sunny hours.

Cloudy/wet days are what really expose the problems of solar plus batteries. (This is why isolated green power systems must have a diesel generator in the shed.)

To insure against, say, 7 days of cloudy weather would require a solar/battery system capable of collecting and storing 700 units of energy while still delivering 100 units to consumers every day. However if several consecutive weeks of sunny weather then occur, this bloated system is capable of delivering 7 times more power than needed, causing power prices to plunge, driving reliable generators out of business and wasting the life of solar panels producing unwanted electricity.

Solar energy obviously does best in sunny equatorial deserts, but that is not where most people live. And the huge Desertec Solar Power Dream for the northern Sahara has failed.

The report card on wind energy is different, but equally depressing.

When Australia had reliable, predictable coal-gas-hydro power in every state, the need for heavy interstate transmission was minimal. But green power will require robust and costly interstate transmission facilities to send large amounts of power at short notice from sunny coal-rich Queensland to cloudy Victoria, windless South Australia or droughted Tasmania.

Read the full report: http://carbon-sense.com/wp-content/uploads/2017/04/battery-baloney2.pdf [PDF, 157 KB]


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