Could Warm Feet Save the World?

Warm feet - photo by spiralz

Wind turbines, photovoltaic power cells, wave energy, porous hydrogen storage composites for fuel cells, carbon sequestration, nuclear, even the idea of damming the Red Sea for a massive hydroelectric power plant are among the high-tech approaches being developed in the battle to reduce our collective size 9 carbon footprints to mere tiptoes.

Saving energy and reducing emissions does not have to be about high tech and macro engineering. The developed world is unlikely ever to give up its dependence on personal motor transport, frequent and pointless air travel, patio heaters, high-definition DVDs, hot and cold running water, and countless other energy-intensive luxuries unless someone actually physical pulls the power plug.

However, for millions of people in the developing world, who may not even be aware of the problems we face with iPhone tariffs, double booked business flights, and lost Facebook friends, life is hard at a much more fundamental level. Aside from poverty, unreliable water supply, malnutrition and disease, even very basic needs are not met, such as keeping warm and dry in freezing mountain villages with no access to heated spa pools and acrylic nail extensions, and wireless internet access to refresh the contents of your Kindle.

D. Buddhi of the Thermal Energy Storage Laboratory at Devi Ahilya University in Indore, India, Atul Sharma of the Department of Mechanical Engineering at Kun Shan University, Tainan, Taiwan, ROC, and S.D. Sharma of UAE Innovations Center in Ras Al Khaimah, UAE have turned to a perennial problem of those without the comforts of central heating and doubly glazed windows – keeping one’s feet warm.

The researchers have designed and tested three foot warmers that can store up solar energy during sunshine hours and then be used during cold evenings as a sustainable alternative to electric heaters. The optimum temperature, the team found in their trials, was just above body temperature. With this in mind, commercial grade lauric acid (which has a melting point 42.2 Celsius and a latent heat of fusion of 181 kilojoules per kilogram was used as the latent heat storage material in their PCM (phase change material) designs. Basically, the material inside melts in the sun and then once the sun goes down the material begins to solidify giving off enough latent heat as it does so to raise the temperature of the container to about 40 Celsius.

They carried out experiments (details are reported in the International Journal of Global Energy Issues) during a winter season to study how well the PCM units performed in the sunny but cold winter climate of northern India. The devices could easily reduce reliance on costly 1 kilowatt electric heaters for keeping the legs and feet warm; and although PCM units do not have the benefit of creating circulating warm air in a room, much of that energy is wasted anyway.

So, could a solar-powered foot warmer save the planet? Perhaps not, at least not until those in the developed world abandon their predilection for vehicle climate control and optical mice. However, alongside other simplified technologies such as solar cookers, arsenic-removing water filters, and clockwork radios, they could at least make a significant difference to the cost of living of people in the poorer parts of the world without compromising their quality of life. Moreover, those in frozen climes will at least be able to keep their feet warm while pondering shag pile carpets and remote control storm shutters.

Hot Milk and Global Warming

Cow's milk - How fresh do you want it?

The most ludicrous media storm blew up in the UK this week over alleged plans that the government was supposedly to force us to use ultra heat treated, so-called long-life, milk in our tea and on our breakfast cereal rather than the nice fresh pasteurised product we have been used to for decades. Wayne Smallman on the blah blah! technology news site has a detailed analysis of the situation. He quotes from a news story on the subject in which it is claimed that “Officials at the Department for Environment, Food and Rural Affairs have made a serious proposal that consumers switch to UHT”.

That’s fair enough officials probably have put forward such a serious proposal. It will have been one of dozens being mooted at any one time within government. Some proposals are literally insane, others will be quietly assimilated into future discussions, and some of them may even reach a minister’s inbox for parliamentary debate. Occasionally, though these kinds of “proposals” escape into the wild where they evolve into the kind of crazed scaremongering story we are used to in the British media. More often than not such discussions are the result of a think-tank type discussion in which a group of intelligent people come up with some “what if” questions and then take the various possible answers to their logical extreme conclusion.

These kinds of extrapolations are never really meant to see the light of day, there may be a nugget or a grain of policy hidden within that will ultimately emerge in a new law, but if the media gets wind of such “what ifs” mid-flow, it seems that they can quickly become the biggest scandal of the week.

It’s ludicrous that getting us to switch to UHT would save energy anyway, UHT is produced, as the name would suggest, by heating it well above the usual pasteurisation temperature and packing it in a hermetically sealed container. The energy cost and carbon footprint of producing UHT, I wager, far outweighs that of refrigerating fresh milk. Moreover, a carton of UHT, once opened, will require subsequent refrigeration, I believe.

There are two other thoughts that occurred to me while warming the teapot just now. Surely, there are other far more wasteful targets for such proposals. Why for instance, do we need to refrigerate containers of carbonated drinks for extended periods. No life form on earth could survive within a cola can with all that acid, sugar and lack of oxygen, surely?

More seriously, though, the UK has obligations in the light of potential climate change to reduce its national carbon footprint. Fair enough, we should all play our part, but currently, I think the UK’s carbon output amounts to a few fractional percentage points of global output. How much of a fraction of a fraction is the switch from fresh milk to UHT going to make when we’re walking on carbon tiptoes as it is? Such a proposal looks especially silly when you consider rapidly developing nations are laying new roads at a rate of dozens of kilometres a week and revving vehicles with which to fill them and at the same time firing up power stations that run on fossil fuels.

As to actually forcing us to drink UHT rather than fresh milk. Perish the thought, it makes a nice cup of tea into a punishment and turns even the tastiest of breakfast cereals into an early morning nightmare of distaste.

Nobel Prize for Peace 2007

Oscar winning politician Al Gore and the hundreds of scientists of the IPCC (International Panel on Climate Change established by the United Nations) have been awarded this year’s Nobel Prize for Peace for their work on raising international awareness of our responsibilities when it comes to climate change.

The award highlights the fact that climate change could have a significant impact on international relations and world peace. Indeed, former IPCC chairman Dr Bob Watson, said that, “What the Nobel Committee has done is to demonstrate to the world that climate change is not just simply an environmental issue but an issue of peace. Climate change can threaten security both at the national and regional level and has brought into sharp focus just how serious this issue is.”

Current chairman Rajendra Pachauri said that this is a prize for all scientists pushing for action against climate change. UN Secretary General said that the Prize, for them, shows that it is beyond doubt that climate change is affecting the world.

Solar Power, Japanese Hair, X-Rays, and Winning SONS

Japanese women

This week, The Alchemist learns of awards to two chemists funded by the European Science Foundation and undertaking cutting edge multidisciplinary work in solar energy and liquid crystals.

It turns out that when it comes to crystallography size no longer matters, thanks to developments in how well x-ray beams can be focused and the positioning of microcrystals for analysis by diffraction. Also this week, could an extract from bilberries be effective against certain types of tumor or even prevent specific cancers developing in the first place?

And, while water cannot burn, there is new evidence that a novel photocatalyst is getting solar energy experts hot under the collar in the search for the perfect hydrogen-production process. In inorganic chemistry, mercury shows its true mettle when confronted with plenty of fluorine and, finally, Raman spectroscopy can now see through even the most highly pigmented hair, revealing the secret of aging Japanese locks.

Cutting the Cost of Watts and Soaking up CO2

Environmental research

In this month’s Intute Spotlight, I report on a new approach to carbon storage that researchers hope will allow us to reduce or stabilise atmospheric carbon dioxide levels, although I have my doubts.

Carbon sequestration is a well-studied theoretical approach to reduce carbon emissions by locking up carbon dioxide deep in the ground or on the ocean floor in various forms. Whether or not such an approach is tenable in terms of the overall energy balance is open to debate but experimental efforts at developing efficient systems to extract the gas from the emissions of electric power stations are underway. The latest effort was recently patented by researchers at The Norwegian University of Science and Technology (NTNU) in Trondheim.

A nanostructured polymer membrane that can extract carbon dioxide from a gaseous flow and convert it to bicarbonate ions could be the key to carbon sequestration in the fight to control levels of the greenhouse gas.

Also high on the green agenda, improving the efficiency per unit cost of solar energy panels, which seems a reasonable alternative and could reduce our dependence on fossil fuels, with the proviso that making, installing, maintaining, and recycling such panels still costs energy and resources, despite the implications made by some environmentalists that they offer free energy. The work in question claims to have cut costs to less than $1 per Watt produced. Finally, there are some doomsayers who would say that we need not worry about the long-term threat of climate change and the decline of fossil fuel supplies because we are long overdue for a catastrophic asteroid impact. The European Space Agency’s “Don Quijote” mission hopes to tilt at asteroids and help give us a clear view of incoming.

Circular Arguments and a Complex World

Mika Aaltonen

Mika Aaltonen of the BIT Research Centre at the Helsinki University of Technology in Finland argues that at the very fundamental level, human beings are storytelling animals, this premise may seem obvious but arises not because we like fairytales and fables but because of the way we perceive cause and effect. By learning from this revelation it might be possible to understand life stories, consciousness, biological systems, climate economic and business models, and countless physical processes that do not follow the simplistic beginning-middle-end narrative model of cause and effect.

Writing today in the International Journal of Management Concepts and Philosophy (2007, 2, 183-193), Aaltonen explains that our current view of causality is seriously limited because of our intrinsic need to frame a sequence of events as a kind of narrative even when such a storytelling approach does not fit with observations. The concept of time is usually used to connect information explain feedback loops and to provide a logical chronology for causes and their effects. However, things are not so simple in the real world.

Firstly, the way we perceive time is different from culture to culture and across human history and comes with its own baggage. For instance, some cultures have no concept of time at all, others see time as a river along which we flow looking to the future while others imagine our walking backwards away from past events. Modern physics too has destroyed any simplistic interpretation of time in relativity, gravitational theory, and quantum mechanics, in which time becomes not a steady stream from alpha to omega but a framework in which are embedded probability waves, matter, and energy.

Secondly, stretching back as far as Aristotle, and perhaps beyond, there were notions of cause not simply being a one thing must follow another scenario. This is not to suggest that there is anything mystical going on, but just that when we lay down strategies and plans these are often engineered again and again from a top-down position, like the re-working of a fairytale or fable. New characters and happenings may be incorporated but the gist of the process is simply to begin with a “Once upon a time…” and to end with an “…and they all lived happily ever after.” This is not the way things really are.

Aaltonen suggests that the discovery of complexity theory in science and the concept of chaotic and nonlinear behaviour show that cause and effect are much more complicated. However, if we can re-engineer the old philosophical tools we might better understand modern problems and find solutions to them. He suggests that there are three drivers, or forces, of causality – final cause, sensitivity to initial conditions, and circular cause.

“More than imagining and presenting the future as an extrapolation of the present, we should be looking for approaches that allow us to see and influence the future by responding to and influencing what is emerging,” Aaltonen told Sciencebase. This is the first force of causality, the sensitivity to initial conditions. The challenge and the inspiration for sense-making and strategic decision-making, he adds, lie in identifying and influencing the initial conditions of a system as they are emerging. We must prepare ourselves for coming change by identifying the initial conditions so we can shape the future to our advantage. We need foresight in other words!

In addition, circular causality can be used to model causal patterns. Activities on the very small scale do give rise to behaviour we can observe on the large scale. “The general term used for this phenomenon is ’emergence’,” explains Aaltonen, “Consciousness is an emergent property of the brain (and the rest of the body), inflation is an emergent property of an economic system, and meaning is an emergent property of language. Emergent properties are not, however, merely effects, there is multi-way communication.” He points out that phenomena on the large scale (macro level) can affect activity on the small scale (micro-level). “Causality,” he adds, “does not simply work from micro-causes to macro-effects. There is also a top-down process at work which means that causality in complex systems is circular.”

He suggests that if something outside an organism is seen as a final cause, a goal or objective, then voluntary behaviour embeds the organism in the environment. “People’s goal-seeking activities become sensitive to final conditions,” he explains. Small variations in the way a larger environment responds can and should dramatically influence how we ourselves respond to those changes. “This way, final cause becomes a target formed from continuous reflection,” he adds.

Understanding the interplay between these three causal forces is key to planning. It is ironic, he says, that we seem to place a natural emphasis on stories as efficient tools for understanding the world, given that strong stories of the past and the future themselves focus our attention and goals and so are reductive in nature, essentially bringing nothing new to the table.

“There is a need to integrate multiple views into strong and dominant stories and into sensemaking in order to add sensitivity to our understanding of the changes occurring in our world,” he argues. Moreover, strong stories actually drive us towards unobtainable goals in almost every walk of life whereas the essential properties of final cause, sensitivity to initial conditions and circular cause and their interplay demonstrate that causal relationships are shifting shapes in a nonlinear world. “If we are to understand the environments we live in, we require approaches that are reflexive, self-critical and nonlinear,” Aaltonen adds. That sentiment applies equally to stifling poverty and responding to climate change, managing a business or carrying out a scientific experiment.

Nuclear Threats

Earlier this week I highlighted the views of Jesse Ausubel, who argues that renewable energy sources will not be sufficient to fulfill global energy demand and that nuclear power is the only viable option for powering the world. See Renewable Myths and Nuclear Heresies. Almost left unsaid, in his argument, although alluded to, are the inherent security and safety issues that surround the maintenance of a widespread nuclear industry. This week, a trio of security serious vulnerabilities surrounding the use of nuclear power have been published.

The first threat is at the source of the raw material for nuclear power itself, the uranium mine, processing plant, and transport route. Here, physical protection and security are at a much lower level than at a nuclear installation in the developed world, according to Austrian scientists writing today in the International Journal of Nuclear Governance, Economy and Ecology.

The second threat is from saboteurs with expertise in the industry and the security of nuclear installations. Researchers from the US Environmental Protection Agency suggest that such saboteurs on the inside could wreak havoc and cause a serious environmental and health threats with only small, shaped explosives or even no explosives at all.

Finally, at the waste end of the nuclear industry, a second US team point out that the significant quantities of spent radioactive fuel could also represent a security nightmare. The team from environmental health and safety consultants S. Cohen and Associates, in Montgomery Alabama, point out that there is no secure central repository for nuclear waste. Any one of the waste storage or processing plants could be vulnerable to a terrorist attack.

Friedrich Steinhäusler and Lyudmila Zaitseva of the Division of Physics and Biophysics, at the University of Salzburg, Austria, have investigated the potential security threats facing the industry at the initial mining and milling end of the nuclear process. They explain how there are several points at which someone intent on terrorism or other purposes might intercept highly radioactive material. For instance, terrorists or saboteurs might instigate illegal mining of an officially closed uranium mine or diversion uranium ore from a mine or mill, or more obviously demolition of facilities with the intention of causing environmental harm.

The Austrian team believes such threats are very real. Uranium mining has been carried out in almost twenty countries, although 90% of world production takes place in ten of these, with seven of these states having been associated with clandestine nuclear activities.

“The current control system is inadequate as it could allow rogue nations or terrorist groups to traffic uranium or enriched yellow cake in at least 24 countries on three continents,” say the researchers, “There is a critical need to counter the threats resulting from an uncontrolled acquisition of these radioactive materials in a coordinated manner.”

Anthony Honnellio of the Emergency Response Branch OSSR and Stan Rydell of the Pesticides Toxics and Radiation Unit, both divisions of the US Environmental Protection Agency in Boston, realised that have been many reports on nuclear security that focus on terrorist attack from outside. However, they explain that sabotage by individuals with a detailed knowledge of security procedures, plant layout and the functional nature of the critical components of a nuclear power plant, could exploit their knowledge to catastrophic effect.

They speculate on how small explosives might be brought into secure areas and reveal that despite post-9/11 security improvements, banned items nevertheless slip through the metal and explosive detection equipment at airports, so could just as readily be brought into a nuclear installation. But, their concern does not lie only with the impact an explosion at a carefully chosen site my cause. They suggest that damage to a critical component could disable a power station and lead to widespread power outages, with significant civil disruption to those dependent on the supply.

In their consideration of security at the waste end of the nuclear industry, Edwin Sensintaffar and Charles Phillips of S Cohen and Associates point out that a recent review of safety and security at commercial spent nuclear fuel plants suggested that such facilities are vulnerable to terrorist activity. A deliberate fire at such a facility could cause widespread radioactive contamination, which could affect the local and wider population as well as cause serious environmental damage.

Sensintaffar and Phillips describe a scenario based on such an event to demonstrate the potential impact resulting from the release and dispersion of spent fuel products. “The radioactive contamination that could be released into the environment from such an event could contaminate thousands of square kilometres, result in billions of dollars in economic impact and large numbers of both early and latent cancer deaths,” the researchers say.

The three papers are in International Journal of Nuclear Governance, Economy and Ecology

Vol. 1, No. 3, 2007, p 286 – “Uranium mining and milling: material security and
risk assessment” by Friedrich Steinhäusler and Lyudmila Zaitseva

Vol. 1, No. 3, 2007, p 312 – “Sabotage vulnerability of nuclear power plants” by Anthony L. Honnellio and Stan Rydell
Vol. 1, No. 3, 2007, p 278 – “Environmental impact resulting from a fire at a spent nuclear fuel storage facility” by Edwin L. Sensintaffar and Charles R. Phillips

Renewable Myths and Nuclear Heresies

Electricity pylon

Renewable does not mean green. That is the claim of Jesse Ausubel of the Rockefeller University in New York. He explains that building enough wind farms, tidal power stations, hydroelectric dams, and electric generators running on biomass to meet global energy demands will wreck the environment rather than save it.

Ausubel has analysed the amount of energy that each so-called renewable source can produce in terms of watts of power output per square metre and compared this with what might be possible using nuclear power instead. “Nuclear energy is green,” he claims, “Considered in watts per square metre, nuclear has astronomical advantages over its competitors.”

While vast sums of money are being invested in alternative energy sources based on wind, water, and biomass, nuclear industry expertise is being squandered. “In order to grow, the nuclear industry must extend beyond its niche of electric power generation,” says Ausubel. He suggests that the nuclear industry could form an alliance with methane suppliers to produce green power in the form of hydrogen for powering electricity-generating fuel cells, not only in vehicles but in other areas inaccessible to the conventional electricity grid. Such technologies will succeed when economies of scale form part of their conditions of evolution, Ausubel explains. In contrast, there are, he suggests no economies of scale involved in simply erecting more and more wind turbines.

Underpinning Ausubel’s argument is the need for “decarbonisation”, by which he means our reliance on producing energy by converting carbon compounds, coal, oil, and gas, into carbon dioxide and water. Hydrogen, in contrast, is as innocent as an element can be, ending combustion as water, with no carbon dioxide greenhouse gas emission. The intrinsic problem in developing a hydrogen-based power economy as opposed to one that relies on carbon compounds, is that energy is required to produce hydrogen. Hydrogen production could be the future role of the nuclear power industry, Ausubel explains – the use of its entirely renewable and almost endless energy supply in the production of hydrogen.

Ausubel considers each so-called renewable in turn. He points out that hypothetically flooding the entire province of Ontario, Canada, about 900,000 square km, with its entire 680,000 billion litres of rainfall, and storing it behind a 60 metre dam would only generate 80% of the total power output of Canada’s 25 nuclear power stations. Put another way, each square kilometre of dammed land would provide the electricity for just 12 people.

Similarly, biomass, which produces less than a fifth of the USA’s renewable energy, is almost as energy inefficient. Most biomass comes from the liquor of paper pulp mills, which is burned to economise the heat and power of paper factories. But, in terms of decarbonisation, this biomass, which initially comes from farmed trees, represents a 10 to 1 ratio of carbon atoms per hydrogen atom, which is less than oil at 1 to 2.

Some people would argue that the use of biomass would be carbon neutral because trees absorb carbon dioxide to grow. However, in order to fulfil the energy requirements of a large proportion of a nation based on biomass, a large proportion of the land area would have to be planted to biomass forest. To obtain the same electricity from biomass as from a single nuclear power plant would require 2500 square kilometres of land working at optimal efficiency. Growth, harvesting and collection are not 100% efficient, relying as they do on high yields and powered equipment and vehicles.

Offshore wind turbines

Turning to the issue of wind, Ausubel points out that while wind farms are between three to ten times more compact than a biomass farm, a 770 square kilometre area is needed to produce as much energy as one 1000 Megawatt electric (MWe) nuclear plant. Moreover, wind farms can only be operated at two of the four wind speed ranges. Calm air means no power, of course, but gales faster than 25 metres per second (about 90 kilometres per hour) also means shutting down the turbines to prevent serious damage. To meet 2005 US electricity demand and assuming round-the-clock wind at the right speed, an area the size of Texas, approximately 780,000 square kilometres, would be needed.

Economies of scale stop with wind. One hundred windy square metres, a good size for a Manhattan apartment, could power an electric lamp or two, but not the laundry equipment, microwave oven, plasma TV, and computer. New York City would require every square metre of Connecticut to become a wind farm to fully power all its electrical equipment and gadgets.

Ausubel gives short thrift to solar power too, which he points out still operates at less than 10% efficiency despite three decades of research. A 1000 MWe photovoltaic solar cell plant would require about 150 square kilometres plus land for storage and retrieval.

The energy density of nuclear fuel is between 10,000 and 100,000 times as great as the most “efficient” carbon fuel, methane. While the full footprint of uranium mining might add a few hundred square kilometres and there are considerations of waste storage, safety and security, the dense heart of the atom has much more to offer than so-called renewables in terms of powering the world, Ausubel believes.

Cooling towers

“My conviction is that our best energy doctrine is decarbonisation, and let us complete it within one hundred years or sooner,” he says, “this will happen only if we abandon wishful thoughts of a renewable Eden.

Ausubel, who is Director of the Program for the Human Environment and Senior Research Associate at The Rockefeller University in New York City, provides details of his analysis in Int. J. Nuclear Governance, Economy and Ecology, 2007, 1, 229-243

Arctic droughts, plastic breakdown, and liquid telescopes

This month’s intute Spotlight from David Bradley is now available online:

Telescopic lunar liquid: A liquid reflector for a vast Newtonian telescope to be based on the surface of the Moon is being developed by scientists in Canada, UK, and US. The new type of telescope could provide the clearest views yet of ancient parts of the Universe.

Arctic drought – Frozen Arctic ponds that have persisted for millennia are drying out during the polar summer, according to evidence from Canadian scientists. Marianne Douglas of the Canadian Circumpolar Institute at the University of Alberta together with John Smol, of Queen’s University, have studied these shallow ponds that dot the Arctic landscape for more than two decades. Changes in such environmental features provide an important indication of how particular regions are being affected by climate change. Douglas and Smol have analysed 24 years of detailed data, including water quality and water levels from about forty Arctic ponds. The data represents the longest record of systematic fresh water monitoring in the high Arctic.

Plastic breakdown – As if to show just how diverse the properties and applications of ionic liquids can be, a new era in recycling of plastics is fast approaching thanks to scientists in Japan. The researchers have developed a process based on ionic liquids that can depolymerise plastic materials back into the component monomers from which they were originally made. The team says the method can then be used to convert waste polymers into new high-quality plastics.

For more site news from Intute Sciences, see Thursday’s Sciencebase.

Environmental intuition on the web

Intute LogoIntute is the Science, Engineering and Technology component of a JISC project based out of England’s University of Manchester and the Heriot-Watt University in Scotland. It offers a free online service with what it describes as the very best web resources for scientific research and education. Like the very best of the earliest web portals all entries are hand selected and evaluated, so there is a serious lack of spam (thank goodness).

Today, Intute announced a new, long-awaited environment wing, to join the SET sections. I thought it worth mentioning this latest development as I write the Spotlight column for the Intute site, which will mean greater coverage of environmental science and issues with the Bradley twist.

The environment section already contains more than 3000 records which scientific journals, lecture note resources, government publications, information on non-profit organisations, and other websites under headings including: Agriculture and the Environment, Biodiversity and Conservation, Climate and Environment, Energy and Resources, Environmental Economics, Environmental Law and Legislation, Environmental Management, Environmental Policy, Landscapes and Landscape Architecture, Pollution Science, and Waste Management.

According to an announcement from Intute: “Due to the nature of the subject area this section is likely to develop rapidly and may necessitate further changes to the headings. If you have an interest in this development you may like to follow the progress on the blog, new resources page, or by contacting the Content Coordinator for the section: jane.podmore-at–manchester.ac.uk or see the SET Blog