Friday, December 25, 2015

ENERGY 2050 BANKRUPTCY - Castes Dark Cloud on Future (Part 4)

Energy 2050 Bankruptcy 


World Energy to 2050
Forty Years of Decline
  
Our Energy Sources
Part 4
By Paul Cherfurka

Coal


Coal is the ugly stepsister of fossil fuels. It has a terrible environmental reputation, going back to its first widespread use in Britain in the 1700s. London's coal-fired "peasoup" fogs were notorious, and damaged the health of hundreds of thousands of people. Nowadays the concern is less about soot and ash than about the acid rain, mercury and especially carbon dioxide that results from burning coal. For the same amount of energy released, coal produces more CO2 than either oil or gas. From an energy production standpoint coal has the advantage of very great abundance. Of course that very abundance is a huge negative when considered from the perspective of global warming.


Most coal today is used to generate electricity. As economies grow, so does their demand for electricity.  The need to use electricity to replace some of the energy lost due to the decline of oil and natural gas will put yet more upward pressure on the demand for coal. At the moment China is installing two to three new coal-fired power plants per week, and has plans to continue at that pace for at least the next decade.

Just as we saw with oil and gas, coal will exhibit an energy peak and decline, though for different reasons. One important factor in the eventual decline of the energy obtained from burning coal is that we have in the past concentrated on finding and using the highest grade of coal: anthracite. Much of what remains consists of lower grade bituminous and lignite. These grades of coal produce less energy when burned, and require the mining of ever more coal to get the same amount of energy.

In addition to their exemplary study of oil supplies mentioned above, the Energy Watch Group has also conducted an extensive analysis of coal use over the next century.  I have adopted their "best case" conclusions for this model. The model projects a continued rise in the use of coal to a peak in 2025. As global warming begins to have serious effects there will be mounting pressure to reduce coal use.  

Unfortunately, due to its abundance and our need to replace some of the energy lost from the depletion of oil and gas, the decline in coal use will not be as dramatic as seen with those fossil fuels. The model has coal use decreasing evenly from its peak to a production level similar to what it is today, giving the curve shown in Figure 5.


Figure 5: Global Coal Production, 1965 to 2050

Of course the increased use of coal carries with it the threat of increased global warming due to the continued production of CO2. Many hopeful words have been written about the possibility of alleviating that worry by implementing Carbon Capture and Storage. CCS usually involves the capture and compression of CO2 from power plant exhaust, which is then pumped into played-out gas fields for long term storage. This technology is still in the experimental stage, and there is much skepticism surrounding the security and economics of storing such enormous quantities of CO2 in porous rock strata.

Hydro


If coal is the ugly stepsister, hydro is one of the fairy godmothers of the energy story. Environmentally speaking it's relatively clean, if perhaps not quite as clean as once thought. It has the ability to supply large amounts of electricity quite consistently. The technology is well understood, universally available and not too technically demanding (at least compared to nuclear power). Dams and generators last a long time.


It has its share of problems, though they tend to be quite localized. Destruction of habitat due to flooding, the release of CO2 and methane from flooded vegetation, and the disruption of river flows are the primary issues. In terms of further development the main obstacle is that in many places the best hydro sites are already being used. Nevertheless, it is an attractive energy source.


Figure 6: Global Hydro Production, 1965 to 2050

Development will probably continue in the immediate future at a similar pace as in the past.  The model for hydro power has its capacity increasing by almost 40% by 2050. This projected growth is gradually constrained toward the middle of the century by two main factors: most useful river sites are already in use, and water flows will gradually be reduced due to global warming.  There may also be a general loss of global industrial capacity (and/or rising development costs) due to oil and gas depletion.  Nevertheless, the pressure on hydro power to replace energy lost from oil and gas depletion will support continued development even in the face of such constraint.


Nuclear






The graph in Figure 7 is a mix of data synthesis with a bit of projection. I started with a table of reactor ages from the IAEA (reprinted in a presentation to the Association for the Study of Peak Oil and Gas), the table of historical nuclear power production from the BP Statistical Review of World Energy 2007 and a table from the Uranium Information Centre showing the number of reactors that are installed, under construction, planned or proposed worldwide.

The interesting thing about the table of reactor ages is that it shows the vast majority of the world's operating reactors (361 out of 439 or 82% to be precise) are between 17 and 40 years old. The number of reactors at each age varies of course, but the average number of reactors in each year is about 17. The number actually goes over 30 in a couple of years. 

Two realizations formed the basis for my model of nuclear power. The first was that reactors have a finite lifespan averaging around 40 years, which means that a lot of the world's reactors are rapidly approaching the end of their useful life. The second realization was that the construction rate of new reactors and their average capacity can be inferred from the UIC planning table.We can therefore calculate the approximate world generating capacity with reasonable accuracy out to 2030 or so.

The model takes a generous interpretation of the available data. It assumes we will build all the reactors shown in the UIC data referenced above: six plants per year for the next five years, nine plants per year for the subsequent ten years, and ten plants per year until 2050. The model further assumes that all reactors will be granted life extensions to 50 years from their current 40, and that no plants will be prematurely decommissioned.  It also assumes that each plant generates an average output equivalent to 1.53 Mtoe per year. The derivation of this figure is given in the model data available here.




Figure 7: Global Nuclear Production, 1965 to 2100

The drop in output between 2020 and 2037 is the result of new construction not keeping pace with the decommissioning of old reactors. The argument for a peak and subsequent decline in nuclear capacity is very similar to the logistical considerations behind Peak Oil - the big pool of reactors we currently use will start to become exhausted, and we're not building quite enough replacements.  The rise after 2037 comes from my estimate that we will then be building 10 reactors per year compared to 6 per year today. The net outcome is that in 2050 nuclear power will be supplying about the same amount of energy that it is today.

A number of factors may act to increase that output.  Those changes could include the uprating of existing reactors to produce more power than their original design specification, an increase in the size of future reactors and/or a building boom prompted by concerns about global warming and the decline of oil and gas supplies.

Restraining the increase will be economic factors (construction will become more expensive as oil and gas deplete, driving up the cost of materials and transportation), and continuing public opposition to nuclear power plants, waste storage and uranium mining.  At some point uranium mining itself may also become a bottleneck - the current world production of about 50,000 tonnes of uranium per year could need to increase to around 70,000 tonnes per year in order to fuel the increased number of reactors.  Of course the amount of additional uranium required will depend entirely on the number of new plants that actually get built.


A number of advanced reactor technologies are presently under investigation or development, including high energy "fast reactors" that produce less waste, reactors that can use more abundant and cheaper thorium as a fuel, and "pebble bed" designs that promise improved safety.  None of these technologies are commercially available (and are unlikely to be within the next decade or two), so they have not been incorporated into the model.


Next
Part 5: Renewable Energy



Friday, November 27, 2015

ENERGY 2050 BANKRUPTCY - Castes Dark Cloud on Future (Part 3)

Energy 2050 Bankruptcy 


World Energy to 2050
Forty Years of Decline  
Our Energy Sources
Part 3

Oil 

The analysis of our oil supply starts from the recognition that it is finite, non-renewable, and subject to effects which will result in a declining production rate in the near future. This situation is popularly known as Peak Oil. The key concept of Peak Oil is that after we have extracted about half the total amount of oil in place the rate of extraction will reach a peak and then begin an irreversible decline.
This peak and decline happens both for individual oil fields and for larger regions like countries, but for different reasons. In individual oil fields the phenomenon is caused by geological factors inherent to the structure of the oil reservoir. At the national or global level it is caused by logistical factors. When we start producing oil from a region, we usually find and develop the biggest, most accessible oil fields first. As they go into decline and we try to replace the lost production, the available new fields tend to be smaller with lower production rates that don't compensate for the decline of the large fields they are replacing.
Oil fields follow a size distribution consisting of a very few large fields and a great many smaller ones. This distribution is illustrated by the fact that 60% of the world's oil supply is extracted from only 1% of the world's active oil fields. As one of these very large fields plays out it can require the development of hundreds of small fields to replace its production.
The theory behind Peak Oil is widely available on the Internet, and some introductory references are given herehere and here.  In addition, the German organization Energy Watch Group provides an exceptionally comprehensive (but still accessible) overview of the topic in the Executive Summary of their recently released study of Peak Oil.



Timing

There is much debate over when we should expect global oil production to peak and what the subsequent rate of decline might be. While the rate of decline is still hotly contested, the timing of the peak has become less controversial. Recently a number of very well informed people have declared that the peak has arrived. This brave band includes such people as billionaire investor T. Boone Pickens, energy investment banker Matthew Simmons (author of the book "Twilight in the Desert" that deconstructs the state of the Saudi Arabian oil reserves), retired geologist Ken Deffeyes (a colleague of Peak Oil legend M. King Hubbert) and Dr. Samsam Bakhtiari (a former senior scientist with the National Iranian Oil Company).  This view is also supported by the extremely detailed analysis published by the Energy Watch Group mentioned above.
My position is in agreement with these luminaries: the peak is happening as I write these words (in late 2007). I have confirmed its occurrence to my own satisfaction by examining the pattern of oil production and oil prices over the last three years. I discovered in the process that crude oil production peaked in May 2005 and has shown no growth since then despite a doubling in price and a dramatic surge in exploration activity. 

The Decline Rate 

The post-peak decline rate is another question. The best guides we have are the performances of oil fields and countries that are known to be already in decline. Unfortunately, those decline rates vary all over the map. The United States, for instance, has been in decline since 1970 and has lost 40% of its production capacity since then, for a decline rate of about 2% per year. On the other hand, the North Sea basin is showing an annual decline around 10%, and the giant Cantarell field in Mexico is losing production at rates approaching 20% per year.

In order to create a realistic decline model for the world's oil, I have chosen to follow the approach of the Energy Watch Group, which is similar in profile to the projections of Dr. Bakhtiari in his WOCAP model . Both assume a gradually increasing decline rate over time, starting off very gently and ramping up as the years go by. The main difference is that the EWG model is slightly less aggressive than WOCAP. WOCAP predicts that production will fall from its current value of 4000 million tonnes of oil per year (Mtoe/yr) to 2750 Mtoe/yr in 2020, while the EWG projects a decline to 2900 Mtoe/yr by then.  The EWG projects an oil supply of just under 2000 Mtoe in 2030.  My model projects a decline rate increasing from 1% per year in 2010 to a constant rate of 5% per year after 2025, resulting in an average decline rate of 4% per year between now and 2050.  In 2050 oil production is only 18% of what it is today, as shown in Figure 1.



Figure 1: Global Oil Production, 1965 to 2050


Keep in mind that Peak Oil is primarily a transportation fuel problem.  Almost 70% of the world's oil is used in transportation as gasoline, diesel fuel, jet fuel and bunker fuel for ships.  Right now there is a lot of excitement surrounding the development of electric cars.  However, the immediacy of the peak and the slope of the following decline suggest that it may prove difficult to replace enough of the global automobile fleet in the time available to maintain the ubiquitous personal mobility we have become used to.  Europe and Asia are placing a lot of emphasis on electrifying inter-city rail and urban mass transit.  Rail electrification seems like a sensible initiative that should be pursued urgently by all nations.

Natural Gas 

The supply situation with natural gas is very similar to that of oil. This similarity makes sense because oil and gas come from the same biological source and tend to be found in similar geological formations. Gas and oil wells are drilled using very similar equipment. The differences between oil and gas have everything to do with the fact that oil is a viscous liquid while natural gas is, well, a gas.

While oil and gas will both exhibit production peaks, the slope of the post-peak decline for gas will be significantly steeper due to its lower viscosity. To help understand why, imagine two identical balloons, one filled with water and the other with air. If you set them down and let go of their necks, the air-filled balloon will empty much faster than the one filled with water. Even though oil and gas reservoirs are made up of porous rock rather than being big pockets of liquid or gas, they behave in much the same way.Because of its viscosity, oil reservoirs often require their internal pressure to be raised over time by pumping in water, in order to force out the oil and maintain their flow rates. In contrast, when a gas reservoir is pierced by the well, the gas flows out rapidly under its own pressure. As the reservoir empties the flow can be kept relatively constant until the gas is gone, when the flow will suddenly stop.

Image result for oil exhaustion


Gas reservoirs show the same size distribution as oil reservoirs. As with oil, we found and drilled the big ones, in the most accessible locations, first. The reservoirs that are coming on-line now are getting progressively smaller, requiring a larger number of wells to be drilled to recover the same volume of gas. For example, the number of gas wells drilled in Canada between 1998 and 2004 went up by 400% (from 4,000 wells in 1998 to 16,000 wells in 2004), while the annual production stayed constant. These considerations mean that the natural gas supply will exhibit a similar bell-shaped curve to what we saw for oil.  In fact, the production of natural gas peaked in the United States in 2001, and in Canada in 2002.  In addition, the remaining large gas and oil deposits are in less and less accessible locations, making the extraction of their reserves slower and more expensive.

One other difference between oil and gas is the nature of their global export markets. Compared to oil, the gas market is quite small due to the difficulty in transporting gases compared to liquids. While oil can be simply pumped into tankers and back out again, natural gas must first be liquefied (which takes substantial energy), transported in special tankers at low temperature and high pressure, then re-gasified at the destination which requires yet more energy. As a result most of the world's natural gas is shipped by pipeline, which pretty well limits gas to national and continental markets. This constraint has an important implication: if a continent's gas supply runs low it is very difficult to supplement it with gas from somewhere else that is still well-supplied.

The peak of world gas production may not occur until 2025, but two things are sure: we will have even less warning than we had for Peak Oil, and the subsequent decline rates may be shockingly high.  I have chosen 2025 as the global peak (20 years after Peak Oil).  The peak is followed by a rapid increase in decline to 10% per year by 2050, for an average decline rate of 6% per year. In 2050 gas production is projected to be only 24% of its current value.  The production curve for natural gas is shown in Figure 4.


Figure 4: Global Natural Gas Production, 1965 to 2050

One of the big concerns regarding a decrease in global natural gas supplies has to be about its role in the production of ammonia for fertilizer.  Currently 4% of the world's natural gas is used for fertilizer production (the largest uses are as industrial and residential heat sources, and for electricity generation).  As the gas supply declines the price will automatically rise and fertilizer prices will go along for the ride.  Rising fertilizer prices will have dire consequences in a world whose expanding population needs to be fed, where much of the land would not be able to sustain its current production levels without artificial fertilizer, and where the largest population increases will occur in the poorest nations with the least productive soils.



It is possible to produce the hydrogen required to make ammonia (the feedstock for most fertilizer) from other sources - coal and electrolysis are often mentioned.  There are substantial risks associated with those approaches, though.  The cost of hydrogen from alternative sources is still considerably higher than for hydrogen made from methane, pricing any resulting fertilizer out of the reach of those who need it most.  Making hydrogen from coal will also generate greenhouse gases as the carbon is burned for process heat.  Electrolysis depends on having cheap sources of surplus electricity available, electricity that is not being used for higher priorities.  As will become clear below, there is a strong posibility that such surpluses will never materialize, especially if the natural gas currently being used for electricity generation needs to be replaced by other sources.

Oil And Gas Combined

Oil and natural gas are the world's primary fuel sources, used for both transportation and heat.  Together they supply a full 60% of the energy currently used by humanity.  According to this model, their combined energy peak will come in 2012, at 6679 Mtoe.  By 2050 they will be producing a combined energy of only 1386 Mtoe.  This represents a drop of 80%.  To the extent that we cannot replace this shortfall through novel uses of electricity from other sources, this decline represents an enormous challenge.  It is a challenge that seems destined to alter the fundamental shape of our civilization over the next three or four decades.




Next

Part 4: Our Energy Sources (con't)


Thursday, October 29, 2015

ENERGY 2050 BANKRUPTCY - Castes Dark Cloud on Future (Part 2)

Energy 2050 Bankruptcy 



World Energy to 2050
FortyYearsof Decline
  
Introduction
Part 2
By Paul Cherfurka
http://www.paulchefurka.ca/

Preface


This article supercedes an earlier work, "World Energy and Population: Trends to 2100".  Compared to that paper this article offers a more comprehensive look at the world's evolving energy supply picture and confines its projections to the first half of the century.  Also unlike that earlier work, this article makes no assumptions about changes in human population due directly to reductions in the world's energy supply.  At the end of the article I will briefly examine one highly probable effect the decline in total energy would have on the quality of human life.

The analysis is intended to clarify a future energy supply scenario based purely on the situation as it now exists and the directions it shows obvious signs of taking.  The model is not intended to show the effects of any of the large-scale changes in direction that have been proposed to cope with declining oil and gas supplies or rising CO2 levels.  Solar or nuclear power "Manhattan Project" style efforts, for example, are not considered.  Treat this scenario as a cautionary tale: given the known resource constraints in energy, this is the likely outcome if we don't take collective action but rather just continue business as usual.

This article will not present any prescriptive measures for either supply or demand management.   You will not find any specific suggestions for what we ought to do, or any proposals based on the assumption that we can radically alter the behaviour of people or institutions over the short term. While the probability of such changes will increase if the global situation shifts dramatically, such considerations would introduce a level of uncertainty into the analysis that would make it conceptually intractable. The same constraint holds true for new technologies. You will not find any discussion of fusion or hydrogen power, for example.


Introduction

Throughout history, the expansion of human civilization has been supported by a steady growth in our use of high-quality exosomatic energy. This growth has been driven by our increasing population and our increasing level of activity.  As we learned to harness the energy sources around us we progressed from horse-drawn plows, hand forges and wood fires to our present level of mechanization with its wide variety of high-density energy sources.  As industrialization has progressed around the world, the amount of energy each one of us uses has also increased, with the global average per capita consumption of all forms of energy rising by 50% in the last 40 years alone.

This rosy vision of continuous growth has recently been challenged by the theory of "Peak Oil", which concludes that the amount of oil and natural gas being extracted from the earth will shortly start an irreversible decline.  As that decline progresses we will have to depend increasingly on other energy sources to power our civilization.  In this article I will offer a glimpse into that changed energy future.  I hope to be able to provide a realistic assessment of the evolution of the global energy supply picture, and to estimate how much of the various types of energy we will have available to us  in the coming decades.
  Methodology 

The analysis in this article is supported by a model of trends in energy production. The model is based on historical data of actual energy production, connected to projections drawn from the thinking of various expert energy analysts as well as my own interpretation of future directions and some purely mathematical projections.

The current global energy mix consists of oil (36%), natural gas (24%), coal (28%), nuclear (6%), hydro (6%) and renewable energy such as biomass, wind and solar (about 2%). Historical production in each category (except for renewable energy) has been taken from the BP Statistical Review of World Energy 2007. In order to permit comparison between categories I use a standard measure called the tonne of oil equivalent (toe). Using this measure, well-known conversion factors for thermal and electrical energy production permit the different energy sources to be easily compared.


We will first examine the energy sources separately, applying the development parameters that seem most appropriate to each. For each source I will define as clearly as possible the factors I have considered in building its scenario. This transparency will allow you to decide for yourself whether my assumptions seem plausible. We will then combine the individual energy analyses into a single global energy projection.


 Notes 

The model was developed as a simple Excel spreadsheet. The timing of some significant energy-related events and rates of increase or decrease of supply were chosen through careful study of the available literature. In some cases different authors had diverging opinions on these matters. To resolve those situations I have relied on my own analysis and judgment. As a result the model has remained open to the influence of my personal biases. I make no apology for this potential subjectivity; such scenarios always reflect the opinions of their authors, and it is best to be clear about that from the start. Nevertheless, I have made deliberate efforts throughout to be objective in my choices, to base my projections on observed trends in the present and recent past, and to refrain from wishful thinking at all times.

The Excel spreadsheet containing the data used in this model is available here.


Next
Part 3: Other Energy Sources  

Tuesday, October 13, 2015

10 MILLION Soon Risk Hunger With Climate Debacle






UNITED NATIONS, Oct 2 2015 (IPS) - At least ten million of the poorest people face food insecurity in 2015 and 2016 due to extreme weather conditions and the onset of El Niño, Oxfam has reported.
In Oxfam’s new report called Entering Uncharted Waters, erratic weather patterns were noted including high temperatures and droughts, disrupting farming seasons around the world.
Countries are already facing a “major emergency,” said Oxfam, including Ethiopia where 4.5 million people are in need of food assistance due to a drought this year.





Thus far — and construction continues — China has created nearly 3,000 acres of land out of the ocean. Just consider that the highly touted and massive US aircraft carriers (from which can launch a wing of more than 70 jets and helicopters) are only 5 acres of flattop. Are these artificial islands similar to hundreds of unsinkable aircraft carriers in the South China Sea? That shifts the balance between the two competing militaries.





Rejecting China’s "Great Wall of Sand," the US Navy concludes that failing to sail and fly close to the outposts would signal that Washington tacitly accepts Beijing’s far-reaching territorial claims. 





Violent clashes have erupted between Palestinian youths and Israeli troops in the West Bank and East Jerusalem.





 

More than 200 Israeli farms occupy the West Bank, plus military zones and highways. The West Bank is no longer a viable or contiguous state. The Palestinians are being squeezed out like pips.  

Global Internet censorship will criminalise online activities, censor the Web, and Internet Service Providers would be required to 'police' YOU, take down Internet content, and cut you off from Internet access.

Image result for big brother 1984 wallpaper
A Passing Thought...



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