Doctor and activist
31/05/2019
31 May 2019 Roosevelt in 1941 spoke of the 4 Freedoms, freedom of speech, freedom of worship, freedom from want, and freedom from fear. This was before the UN Declaration of Human Rights. I spent 10 years in boarding schools from the age of 8 where religion was most definitely in charge. Many of the […]
09/09/2018
9 September 2018 At a recent visit to Berne to look at Swiss democracy, I visited two Einstein museums. I do not propose to give his biography, but merely to point out a couple of points that struck me as his life was proudly displayed. He had been a pacifist all his life and in […]
19/10/2017
19 October 2017
The energy plan proposed by the Lib/Nat government has several major flaws based on either their poor understanding of how an electrical network works or wilful misrepresentation. It is a government sanctioned, long term price fixing agreement.
The current plan is to force energy retailers to buy a minimum amount of energy from “reliable” thermal plant to ensure reliability by reducing the input from “unreliable” renewables. The plan is not a surprise as the thermal plant owners had a big input into it. This effectively puts a base price on energy of about $85 per MWh i.e. the typical wholesale price of power from at thermal plant.
The government confuses reliability with despatchability.
Reliability is a measure of whether a power source will be working over some specified time interval. A better metric is availability i.e. the time period over which the power source is performing within acceptable parameters.
Modern well maintained thermal power stations have availabilities in excess of 95%. But for example if Liddell which has 4×500 MW turbo generators has only been able to keep 3 running consistently its total availability would be 95%x0.75 =70% i.e for 70% of the time over the last few years it has been able to despatch, supply when needed 4×500 MW. Its capacity to despatch 3 x500MW has been 95%. Actually Liddell’s performance has been much worse than this.
Base load is the Coalition’s other favourite subject. It takes about 8 hours to start up a large thermal power station and about 12 hours till it comes up to full capacity. These times are dictated by differential expansion of its components. Hence normal practice is to keep these units running continuously. They also exhibit stability problems when run at less than 30% capacity. At night when the demand for electrical energy drops, continuously running operations like steel mills, aluminium refineries, cement works etc. took up this load generally this was not enough to keep the load above 30% hence the low off peak rates offered for water heating.
The problems of differential expansion also mean that thermal plant cannot respond quickly to changes in load especially load increases.
The above limitations meant that in a system dominated by thermal plant you have to keep enough older plant running at low load so that it could take up the power of the largest unit in your system should that unit be forced to shut down in an emergency i.e. trip. This is system spinning reserve. So the price will be set by the needs of the old fossil fuel plants. This will keep the coal owners happy. It will also keep the renewable generators happy as the high price will give them a massive profit margin. It will keep Labor happy, as thye can make a magnanimous gesture of bipartisanship and when they come in there will be lots of renewables built to get the huge profit levels that have been there for the taking.
The people who will not be happy will be the industries that will go broke because unnecessarily high power prices made them uncompetitive, and the long-suffering homeowner.
Renewable energy power systems and hydro have different characteristics. Hydro is despatchable if you have sufficient water. Australia’s lack of water means that all of our large hydro stations do not operate continuously. They are mainly used to handle short and medium length load peaks as they can respond quickly to load changes. Naturally if the water were pumped up when there was spare power they would act as batteries.
Wind and PV systems are not fully despatchable as their output is dependent on wind strength and sunlight. They can respond quickly to load changes.
Their availability here in Australia is much, much better than the Liberals would have us believe and our ability to forecast wind in the medium term is now very good. Hence their availability is quite high. We can also use concentrated solar thermal plant. Here a heliostat field of several hundred hectares is used to concentrate sunlight onto a boiler mounted in a tower to heat a transfer medium, typically sodium carbonate to about 400 deg.C. The molten salt is pumped into a storage tank and then pumped through a heat exchanger to generate steam which drives a steam turbine. One such plant is planned for the head of Spencers Gulf in SA. Here the energy is stored as heat and the molten salt can be drawn from the hot tank to generate steam on demand i.e. the plant’s capacity is despatchable.
For example a wind farm costs about M$2.00 per MW to install. A 1MW unit running at 40% capacity factor, most wind sites do better, will then generate about 3,500MWh pa at $85 per MWh this will be $300,000. Assuming capital costs of say $85,000 and service and maintenance of $84,000 this leaves a surplus of $207,000 a very good financial result especially when you compare this to a thermal plant which will cost about M$30 per MW to build and take 10 years in the building compared to about 3 years for a wind farm.
Older thermal stations like Liddell are worn out especially their boilers which from a large part of the capital cost the boiler tubes suffer from stress fatigue and start developing fractures. Coal and ash handling plant starts to wear out and even the turbine blades erode due to the aggressive operating temperatures. Eventually the combination of wear and loss of availability makes them uneconomic. Try keeping a 40 year old car road worthy if you use it as a taxi.
01/07/2017
1 July 2017 I have grave fears for this system. I am unsure even of the goodwill of some of its advocates. I was on the Social Issues Committee of the NSW Parliament and we looked at Disability services and the way that these were delivered. Basically if you ask how big the disability problem […]
15/05/2017
15 May 2017
Since the last two world wars were over markets, it was assumed at the conference at Bretton Woods that if there were free markets everywhere there would be no wars and countries who did well would prosper. It worked. Germany and Japan traded in markets that had been denied to them pre-war and ‘won the peace’. The dogma was that because there was efficiency in production we would all be better off as goods would be available all over the world quickly and cheaply. And, helped by the overwhelming dominance of Milton Friedman’s economic theories the market has spread into every aspect of life. The fact that when Friedman’s theories were actually implemented in South America that they failed miserably was merely a blip ignored.
Now the market is assumed to be better than anything else as a way of allocating resources efficiently. It is better than government, better than planning, hey it is infallible, and probably inevitable as well!
Governments do not have to manage anything; they can sell it, even if they do not need the money. Inner city buses are the latest.
If you read Chapter One of most economics books, it tells you about competition and how you cannot charge too much or a competitor will uncut you, so prices are kept down.
The rest of the economics book tells about monopolies or oligopolies, where there is poor competition and you can charge what you like, or there are high set up costs as barriers to competition, or regulatory hurdles, artificial training or registration requirements, geographical limitation, existing facilities, impractical duplication costs etc etc, which make monopoly or ‘supernormal’ profits a certainty. Yet Governments plough on creating private monopolies and compliant political parties are rewarded by campaign funding to keep on winning elections.
What I am writing is not new or original and is known by anyone with even the most basic grasp of economic theory. Do the politicians not read past Chapter One? Do they never think that they are creating uncontrolled monopolies as they transfer assets from ownership by all the society to ownership by a moneyed elite? Are they so ideologically committed to privatisation that they no longer think at all? Do they not care, or will they do anything for their own short-term interest? It seems that the answer to all these questions is YES!
They have sold the airport, the sea port, the water supply (an endless subsidy to an unused desalination plant), the railways, the electricity, the road network and easements under it, the world standard database of land titles registration, the small councils power to control development, the list goes on and on. The health system is being sold by stealth. Medicare is being starved to death, as private health insurance is just subsidised inefficiency, and NDIS disability services will go the same way, no government services, oligopolies for profit paid for by the ‘Medicare’ levy rise, which is not even committed to Medicare. The education system no longer produces tradesmen to do the job and private education rip offs abound from dodgy day cares to non-Gonski funding to schools to post-TAFE colleges selling dubious certificates to phantom colleges ripping off visa-seeking migrant students.
The public service is being ‘hollowed out’. It no longer retains centres of expertise as it can always buy ‘consultants’ who carry briefcases and impressive CVs and have no interest except the public good. It closes offices, hires short term workers, relies on PR driven websites and replaces people with knowledge by ‘Services NSW’ which has someone who might know which department might do what you might want.
Our existing political system seems unable to govern in our interest. The interest of the political parties no longer coincide with the public interest. Our governments’ decisions have been bought like everything else. I do not think that money can be held at bay by electoral funding law reform. When we fought the tobacco industry, it sponsored sport and culture to get political allies. When that was banned, it sponsored ethnic groups, rescue boats and helicopters, any worthy cause that could lobby for it, and that was without gifts in kind, dodgy ‘foundations’ or other less visible influence-buying.
The only answer that I can think of is Swiss-style democracy where major decisions are taken by referenda of the people, and Parliaments merely implement decisions that the people have made. Any other suggestions?
26/11/2016
26 November 2016 Power, Injury and Awards. I work in medicine, treating mostly third party motor vehicle injuries and workers compensation injuries. There are much fewer of the latter because there are less employees. Many people working as couriers are ‘self employed’ contractors. One man had to pay $75,000 for the right to deliver parcels […]
13/06/2016
13 June 2016 Negative gearing is seen as just an easy way to make money. You buy a property, gear it to lose money and get a tax deduction. The property goes up in value, and you make a fortune. In fact, the less you put in, the higher your percentage return. It is seen […]