Showing posts with label energy. Show all posts
Showing posts with label energy. Show all posts

Thursday, November 20, 2008

Energy Return on Investment vs. Price


In response to the statement "As the oil price increases, the tar sands and oil shales will become commercially viable", I heard myself say firmly "It's not the price of oil that is the issue but energy return on investment" a little voice inside was saying "but......."

The Energy Return on Investment (EROI) argument goes "it's the energy you have to put in, in order to get energy out that is important". Natural gas is used to heat the oil shales, thus melting the small amount of bitumen they contain which can then be extracted. So you are effectively converting Natural Gas into oil, with a return on investment of about 5-10% in energy terms.

That argument holds good if the energy being used to produce the new source of energy has an equivalent price. (Or if one type of energy production gets tax benefits.)

A nuclear power station requires ongoing amounts of uranium (180 tonnes/pa per GigaWatt) and mining and processing uranium takes a substantial amount of energy. Depending on how much of the mining, processing, enrichment and work to decommission open cast mines is included. EROI is between 1.86 and 60. There have even been claims that nuclear has a negative EROI. Suppose you believe in the negative number but the uranium is produced in a country that also has cheap, low grade coal. This country sells the enriched uranium to another country with high electricity prices for their nuclear power plant. You can therefore have a negative EROI but a positive commercial return for both the uranium producer and the power plant operator.

So next time I answer in their, I shall instead start with the more careful "Well it's not as simple as that...".

Tuesday, September 16, 2008

We have not been here before

The present economic crisis has two main causes. One is the downturn of an extreme version of the normal business cycle. The other is that a trend - the increasing inadequacy of the world's supply of oil as a result of resource depletion - revealed itself just as that cycle was reaching its peak and both precipitated and accelerated the decline.

There has never been a coincidence of a cycle and a trend in this way before. We are in completely uncharted waters because the cheap, abundant energy supply which has enabled economies to recover from depressions in the past may not be available this time around.

In a normal economic cycle, the easy availability of cheap credit provides the extra purchasing power required for output to grow. According to David Roche, an investment consultant writing in the Financial Times, $4-$5 of new credit is needed for each $1 of GDP growth.

After a time, however, the economy concerned begins to run out of key resources – skilled workers, perhaps, or factory space – and prices begin to rise, pushing up the Consumer Price Index. This, in turn, triggers a response from the central bank, which raises interest rates or puts restrictions on lending to prevent inflation becoming excessive. Borrowing falls, the rate of demand growth slows, and the down phase of the cycle begins.

The cycle that has just entered its down-phase was rather different, however, because the world's central banks failed to step in to keep it within previous bounds. They failed to act because the price rises it generated were not reflected in the consumer price indices they monitored until very recently because supplies of cheap goods, foodstuffs and skilled labour were available from the poorer parts of the world. The price increases which did develop came in ways which did not directly affect consumer prices. They were in asset values: property and share prices increased, but everyone thought that this was a good thing.

These increased asset values provided security for additional loans, and so the up-cycle continued until one critical resource - oil - began to run short on a global scale. Its price soared, taking money out of the oil-consumer-countries' economies and transferring it to the oil producers just at the time that the asset-based borrowing boom was peaking anyway in the US and several other countries. The boom was peaking because borrowers did not have the incomes to take on more debt despite valiant efforts to enable them to do so, such a giving 100% mortgages to be paid off over 40 years at five times (or even seven) times a couple's joint income.

If the current down-turn was like its predecessors, we could expect a period of readjustment (an innocuous term meaning unemployment, repossessions, a few winners and a lot of losers). After a time, house prices would dip down to a point where buyers come back into the market, credit became more freely available and the economy started to pick up.

This time, however, because a super-boom was allowed to develop, the risk is that the bust will be on a similarly super scale and that the capital write-offs will be huge, endangering the banking and money creation systems. Unemployment may reach record levels. The demand for energy is already dropping. The danger is that oil prices will return to a low level, not only destroying the viability of all the renewable energy projects that are now getting under way but also halting oil field development.

If this happens, since very little new capacity will be built, when economies eventually start to recover, supplies of energy and other resource may quickly become inadequate and prices could rise again very rapidly, This could stifle the recovery and make it very costly to move to a more sustainable economic system.

Energy Scenarios Ireland 2.0 explores the present situation and how it might work out.
In Business As Usual we assume that the economists who think that the down-phase of the economic cycle will be short are correct and that growth will resume in the near future. We also assume that significant supplies of oil and gas will be discovered and we can therefore ignore the possibility of energy shortages for the moment. A further assumption is that fossil energy use is not restricted for climate change reasons.

In Enlightened Transition, we assume that action to replace the world's depleting supplies of oil and gas stimulates a global economic recovery so that, as the economy grows, demand for non-renewable energy falls.

In Fair Shares, the economic recovery is slow as Ireland struggles to make its economy more sustainable but with limited resources to do so. In this scenario, falling global energy prices mask
the decreasing supply trend until the economy starts to recover.

In Enforced Localisation no significant action is taken and the country slides into economic collapse. Recovery is long and slow.

Monday, August 18, 2008

Introduction to Energy Scenarios Ireland 2

In looking to help people understand how the future might be different from today, we could have made a prediction about what that future holds. To do this we would first have had to reach a compromise between us about what the future would be like. Then we would have had to adjust that future to within the bounds of what we thought others would find credible, after all there is no point in making a prediction that nobody believes. This would have limited the areas we could explore by not going outside the popular comfort zone. In the end our damped down prediction would have read something like "After a period of readjustment, Ireland will return to a period of strong economic growth...". Just what everyone wants to hear.

Or, we could go ahead and make a prediction. Human nature being what it is, the most common reaction would be to focus on the areas of disagreement. A heated discussion would follow that might change a few opinions, but make little progress towards identifying risks and opportunities for the future and improve long term decision making.

So instead we have chosen to continue to use Scenario Planning to explore a range of possible futures, none of which we expect to reflect what actually happens, but instead explore different aspects of our future. Our experience developing Energy Scenarios Ireland version 1, was that it is much easier to lay aside our inbuilt assumptions and consider a unexpected future if it is not being touted as a prediction. It circumvents the long process of convincing others that we are right and we can go straight to applying our collective imaginations to exploring the risks and opportunities for that scenario. Everyone can then apply what they have learned to their own vision of the future. Looking at the scenarios collectively helps in developing and testing plans - if a plan will only work in one scenario, building in more flexibility should be considered.


We are, in fact, going to explore "After a period of readjustment..." with four scenarios, that are similar but not exactly the same as those in the previous version of Energy Scenarios Ireland.

Read more about the previous version here: http://www.energyscenariosireland.com

Business As Usual - we briefly look at a short period of readjustment followed by a return to strong economic growth. What might have to happen in order for this fairy tale to come true!
Enlightened Transition - considers a longer downturn but an immediate focus on increasing energy productivity and moving to renewable sources of energy. This leads to economic recovery driven by investment in these new areas. Not without pain for those dependent on Business As Usual.
Fair Shares - we wait longer before making a commitment to move away from fossil fuel and therefore have less resources with which to do so. Recovery takes longer to start and improvement is slow.
Enforced Localisation - we continue to be optimistic about the future until there are few options left but to return to a subsistence economy.

Scenarios are not predictions. In order to explore these different scenarios we are making assumptions about the wider world that include:
- no sudden and significant climate change
- no sudden and significant increase in terrorism
- no pandemics in either humans or livestock
- no discover of direct replacement for oil that is cheap and quickly scaleable
- Ireland cannot act unilaterally to any extent, so the rest of the world follows broadly the same scenario