Thread: Katoomba Monthly Temp average set to be SMASHED!!! AGAIN!!!

Originally Posted by FenceFurniture

LPG cars have been on the road for about 40 years, and don't seem to have earned any particularly dangerous reputation, AFAIK.

Brett

LPG? Good point. Some detail on H2. Note the upper and lower explosive limits (4% and 75%)

Hydrogen Compared with Other Fuels | Hydrogen Tools

and a little bit of discussion here:


Why are hydrogen cars so expensive to fuel and considered dangerous? - Quora

You will have to open up the articles for further reading. Warning: Both articles are on the negative side.

Hydrogen at the power staions is made using electricity to separate it from water. It is stored at about 16MPa (liqid form)

Regards
Paul

The CSIRO have been working on hydrogen as a fuel for quite a while. The last I heard, they were looking at transporting it as ammonia and then processing it into its molecular components of nitrogen and hydrogen. I believe the process involves using solar energy for the initial reaction and possibly re-conversion.

I believe industry uses 2/3 of baseload power and domestic the balance. This being the case, using solar for day shift manufacturing is a no brainer. All we need is power transmission capability.

mick

While you are here Mick, can I direct you to my post #439 please?

Originally Posted by FenceFurniture

LPG cars have been on the road for about 40 years, and don't seem to have earned any particularly dangerous reputation, AFAIK.




In today's news:
Rogue Nationals wanting new coal-fired power stations face battle with Liberals and markets - Politics - ABC News (Australian Broadcasting Corporation)

Have alook at this too!!

Billion-dollar Indigenous-led power station to revive struggling Queensland coal town - ABC News (Australian Broadcasting Corporation)

Regards
Paul

Originally Posted by FenceFurniture

While you are here Mick, can I direct you to my post #439 please?

Sorry mate. I've only been following this thread on & off. Been in the shed from sparrows until dark.

I'll have to sit down & do some calcs. tonight and let you know. Of course, petrol is vegetable soup changing composition with the seasons, so there'll be an error factor involved, but close enough is good enough for this topic.

Are you going for a personal best for length of thread? Or even a forum record?

mick

The End is nigh!

I have been thinking about my post No 437 and FF's at 439. At 90 kmh the truck would take two minutes to cover 3 km, the engine is a Caterpillar 3208, 8 cylinders and 10.4 litre displacement. At 90 kmh it's pulling 2,800 rpm which is 5,600 rev's over the two minute span, but because it's a four stroke engine only half the rev's are hot so that brings the firing rev's back to 2,800. 2,800 x 10.4 = 29,120 litres of air/fuel mixture sucked in over that two minute period, that's assuming 100% efficiency which it wouldn't achieve but we'll stay with that. That's nearly 30 m³ ​!!!
In that two minutes each cylinder has fired 2,800 times therefore 8 cyl's x 2,800 = 22,400 individual firings for 1 litre of diesel. A minuscule drop of diesel, one 22.4^th of a ml is injected each firing if my maths is right.

Years ago before we had radios and other distractions in the trucks I used to do these maths problems in my head (writing numbers in the dust on the dashboard not allowed) but I had to use a calculator for this. I hope I'm correct but no hard feelings if my calculations get blown out of the water (or off the road).
Cheers,
Geoff.

Interesting article from back in September from the ABC

Rare weather event over Antarctica driving Australia's hot, dry outlook - ABC News (Australian Broadcasting Corporation)

Interesting wording from the head scientist Not climate change but 'natural phenomenon’

Luckily they don't happen down here too frequently.

Originally Posted by Beardy

Interesting wording from the head scientist Not climate change but 'natural phenomenon’

Well there are plenty of natural phenomenons in weather and climate (El Nino etc).

Originally Posted by Bushmiller

I have a little information on what we are up against regarding the transition to renewables.

Thanks, Paul.

I found that to be very informative.

Can I presume that the two 'plateaux' of dispatchable power being generated by Tas that is well above their own demand is them turning on the tap to ramp up their hydro for export into the mainland states at peak demand times?

Originally Posted by Beardy

Interesting article from back in September from the ABC

Rare weather event over Antarctica driving Australia's hot, dry outlook - ABC News (Australian Broadcasting Corporation)

Interesting wording from the head scientist Not climate change but 'natural phenomenon’

Thank you for posting that Beardy.

Interesting read.

Terms:
SSW - is a Sudden Stratospheric Warming over the poles.
IOD - the Indian Ocean Dipolar
SAM - the Southern Annular Mode
BOM - Bureau of Met

According to Dr Hendon, the BOM views "SSWs as a natural, internally-generated, phenomena," but "... very rare in the southern hemisphere."

Although rare, this particular SSW has had a measurable impact on our weather this summer.

What the SSW did this summer was to push the SAM further north, exacerbating our dry conditions.

Elders Weather

Dr Watkins (also from the BOM), said that cooler than normal water in the Indian Ocean, a phenomenon meteorologists call a 'positive IOD', has led to a lack of moisture drifting over the continent. "This has certainly been a big factor in why winter has been so dry in virtually all of Australia. On top of that, we have the likelihood of prolonged periods of negative SAM, which also brings drier conditions to New South Wales and southern Queensland

Both the IOD and SAM are understood to have been altered by CC.

Evolution of the Southern Annular Mode during the past millennium

Increased frequency of extreme Indian Ocean Dipole events due to greenhouse warming

So, the long term trend in climate change has been disturbed this summer (negatively, from our perspective here in SE Australia) by an rare (only twice in sixty years) weather event that itself is not thought to be caused by climate change.

More here on SSWs, if interested.

Originally Posted by NeilS

Can I presume that the two 'plateaux' of dispatchable power being generated by Tas that is well above their own demand is them turning on the tap to ramp up their hydro for export into the mainland states at peak demand times?

Neil
The DC link under Bass Straight was constructed primarily forTasmania in case they had a dry spell and ran out of water and not so they could supply Victoria.

However, human nature reared it’s head and the Tasmanian power companies saw an opportunity to cash in on higher prices in Victoria. So, they supplied Victoria and bought in power when required at lower prices. That all worked well until they had significantly depleted their dam supplies and the DC link broke! Then they were paddleless in that well known polluted creek.

You may remember they were shipping every diesel generator they could find over to Tassie as the link was not easily repaired and was, I think, unavailable for about nine months.

Consequently, they are a little more circumspect nowadays,but are still driven by “commercial considerations.” So I don’t know exactly but I think your surmise is probably correct.

Regards
Paul

Originally Posted by NeilS

Thank you for posting that Beardy.

Interesting read.

Terms:
SSW - is a Sudden Stratospheric Warming over the poles.
IOD - the Indian Ocean Dipolar
SAM - the Southern Annular Mode
BOM - Bureau of Met

According to Dr Hendon, the BOM views "SSWs as a natural, internally-generated, phenomena," but "... very rare in the southern hemisphere."

Although rare, this particular SSW has had a measurable impact on our weather this summer.

What the SSW did this summer was to push the SAM further north, exacerbating our dry conditions.

Elders Weather

Dr Watkins (also from the BOM), said that cooler than normal water in the Indian Ocean, a phenomenon meteorologists call a 'positive IOD', has led to a lack of moisture drifting over the continent. "This has certainly been a big factor in why winter has been so dry in virtually all of Australia. On top of that, we have the likelihood of prolonged periods of negative SAM, which also brings drier conditions to New South Wales and southern Queensland

Both the IOD and SAM are understood to have been altered by CC.

Evolution of the Southern Annular Mode during the past millennium

Increased frequency of extreme Indian Ocean Dipole events due to greenhouse warming

So, the long term trend in climate change has been disturbed this summer (negatively, from our perspective here in SE Australia) by an rare (only twice in sixty years) weather event that itself is not thought to be caused by climate change.

More here on SSWs, if interested.

I am surprised it has slipped under the media radar without more commentary, you would of expected the denier camp would of been all over it.

Originally Posted by Beardy

you would have expected the denier camp would of been all over it.

Maybe there is less of them these days.