Geothermal

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Details: Written by: Richard_McKie; Parent Category: Economy; Category: Energy; Published: 26 December 2010; Hits: 82175

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Geothermal power is competitive with coal and less expensive than wind when the resource is very near to the surface; for example in the ‘pacific rim of fire’ countries. Many plants already exist around the world in volcanic areas. Unlike wind or solar geothermal power is continuous and ‘base load’. But the easily exploited resource is geographically limited and its contribution to total energy consumed worldwide is negligible compared to that of hydro and wind.

Deep geothermal is more widely distributed and is being explored in several locations in Australia but at the present time substantial technical issues have not been fully resolved and the capital cost of extraction is likely to be very high (leading to a high carbon footprint and very high cost per kWh).

Nevertheless it is hoped that geothermal power could compliment wind or solar as the REC value climbs and/or an ETS comes into effect.

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Travel

The Greatest Dining Experience Ever in Bangkok

A short story

The Bangkok Sky-train, that repetition of great, grey megaliths of ferroconcrete looms above us.

All along the main roads, under the overhead railway above, small igloo tents and market stalls provide a carnival atmosphere to Bangkok. It’s like a giant school fete - except that people are getting killed – half a dozen shot and a couple of grenades lobbed-in to date.

Periodically, as we pass along the pedestrian thronged roads, closed to all but involved vehicles, we encounter flattop trucks mounted with huge video screens or deafening loud speakers.

Fiction, Recollections & News

The Writer

The fellow sitting beside me slammed his book closed and sat looking pensive.

The bus was approaching Cremorne junction. I like the M30. It starts where I get on so I’m assured of a seat and it goes all the way to Sydenham in the inner West, past Sydney University. Part of the trip is particularly scenic, approaching and crossing the Harbour Bridge. We’d be in The City soon.

My fellow passenger sat there just staring blankly into space. I was intrigued. So I asked what he had been reading that evoked such deep thought. He smiled broadly, aroused from his reverie. “Oh it’s just Inferno the latest Dan Brown,” he said.

Opinions and Philosophy

Electric Cars revisited (again)

Electric vehicles like: trams; trains; and electric: cars; vans; and busses; all assist in achieving better air quality in our cities. Yet, to the extent that the energy they consume is derived from our oldest energy source, fire: the potential toxic emissions and greenhouse gasses simply enter the atmosphere somewhere else.

Back in 2005 I calculated that in Australia, due to our burning coal, oil and sometimes rural waste and garbage, to generate electricity, grid-charged all-electric electric cars had a higher carbon footprint than conventional cars.

In 2019, with a lot of water under the bridge; more renewables in the mix; and much improved batteries; I thought it was worth a revisit. I ran the numbers, using more real-world data, including those published by car companies themselves. Yet I got the same result: In Australia, grid-charged all-electric cars produce more greenhouse gasses than many conventional cars for the same distance travelled.

Now, in the wake of COP26, (November 2021), with even more water under the bridge, the promotion of electric cars is back on the political agenda. Has anything changed?

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