They do it with lenses

Hot and sunny days like the current mini-heatwave across the UK are just what are needed for the testing of a ground-breaking experimental solar power system which has the potential to generate carbon-free electricity in a new way.

The pioneering solar steam project is undergoing a series of tests this summer to further prove and develop the system as a potential alternative form of renewable technology.

Surrounded by protective fencing and with its own mini control centre, the test structure dominates the sky-line at the offices of sustainable development company the Larkfleet Group in the small market town of Bourne.

With the support of Cranfield University and its own modest R&D budget, the Larkfleet solar steam plant is believed to be the largest practical demonstration anywhere of a fresnel lens (as opposed to fresnel reflector) system for the concentration of solar power. 

The futuristic construction is essentially a collection of giant lenses - manufactured in plastic to keep costs low - designed to concentrate the energy of sunlight onto metal piping and heat water to boiling point.

It measures just over 13 metres (42 feet) long by 5.5 metres (18 feet) high when extended to its maximum and the metal framework holds a series of lenses which concentrate refracted sunlight onto a 9 metre (30 feet) long metal pipe to heat water circulated inside. Full-size systems will be very much larger.

To maintain maximum power generation the lenses need to constantly track the sun in both azimuth and elevation - and so the rig needs to be automated.

"The principle is already proved and we are now looking at enhancing the tracking system to make it fully automatic," says Simone Perini (pictured below), a solar energy expert who joined Larkfleet's R&D team from Cranfield University last year.

Light weight, low cost plastic lenses make accurate tracking possible both horizontally and vertically using relatively light mechanisms.

An automated dual-axis tracking system being developed as part of the project will concentrate solar irradiation with limited external input.

The system creates a solution for industrial heat users in areas of high direct sun/clear sky locations for modular thermal energy production deployment

"Cost reductions and accurate tracking more than compensate for any loss of optical quality,” explains Perini. “Plastic lenses are less expensive to produce than vast arrays of glass mirrors now being used on comparable power generation systems throughout the world.

"It is challenging but a lot of work has been done already and it is an innovative project with great potential. For the same reason is very exciting."

Data will be gathered during a summer of testing before an evaluation phase leading to the next stage of development starts in September.

A quick search under solar steam on the internet does reveal a plethora of small scale amateur projects using a few lenses. “The difference here in Bourne is that we are running a full-scale demonstration R&D project,” says Perini. “I did find a similar plant being built in Japan but this was based on a point focus solar furnace so is quite different.”

As well as developing the system itself, Larkfleet is also assessing the potential market for such solar steam renewable technology.

One possibility is using it to generate electricity by driving a turbine - but it has many other potential uses so there are big incentives to make it as efficient as possible.

"We believe this is the sort of system that could be attractive to SMEs in the small scale solar market for any process heating system that requires heat of between 80 and 250 degrees," says Matthew Hicks, the group's renewables investment director.

"It would be extremely valuable in parts of the world where the sun is the only readily available source of energy and could be used to power desalination plants, refrigeration, sterilisation, chemical purification and numerous kinds of waste treatment," he added.

The system - already attracting interest from around the globe - might even be integrated into traditional power stations to reduce the burning of fossil fuels.

"The solar steam could be fed to the power station generators so gas or coal would only need to be burned at night or on days when solar power is not enough to meet demand," Hicks suggests.

"The solar steam rig provides an opportunity for looking into a new method of low carbon energy generation and is very much a long-term project - we will trial the technology fully before coming to any conclusions about its future potential."

Larkfleet Group is a privately-owned house building and development organisation with a strong record in creating high quality homes and communities.

It specialises in building energy-efficient housing and continually invests in research and the development of innovative new sustainable building designs, materials and construction methods.

It is also a major developer of sustainable energy projects and a provider of energy-efficiency improvements for new and existing buildings.

Larkfleet Group companies are currently developing large photovoltaic (PV) solar farms, adding PV panels to new and existing buildings at a variety of scales, and refurbishing existing homes to reduce their carbon footprint, energy use and energy costs.

Photos & article by Clive Simpson

All fracked up

Sooner or later if the government’s plan comes off there will be a shale gas fracking site near you. Or you will have a friend or family member who lives near one.

That’s because around 3,000 wells could be drilled at more than 1,000 sites across the country in order to deliver up to a fifth of the country’s annual gas demand to an increasingly power hungry society - welcome to Fracking GB plc!

Today the government began a new round of licensing for onshore oil and gas, which opens up around half of the UK to potential fracking, including national parks in ‘exceptional circumstances’.

The licences are the first step towards exploration but firms will also have to obtain planning consent, permits from the Environment Agency and a sign-off from the Health and Safety Executive.

Fracking involves blasting water, chemicals and sand at high pressure into shale rock formations deep under ground to release the gas held inside.

In announcing the so-called 14th onshore licensing round, Business and Energy Minister Matthew Hancock said: "Unlocking shale gas in Britain has the potential to provide us with greater energy security, jobs and growth.

"We must act carefully, minimising risks, to explore how much of our large resource can be recovered to give the UK a new home-grown source of energy."

Today’s Guardian newspaper reports the government has committed nearly £2.5m of public money to an office to encourage fracking - before a single home has been powered by shale gas.

David Cameron has said the UK is going "all out for shale", with his government offering tax breaks to fracking companies and promising local authorities they will be able to keep 100% of the business rates from fracking operations, rather than 50% as before.

Previously unreleased figures show that the Office of Unconventional Gas and Oil (Ougo) - set up in March 2013 to encourage the development of shale gas and oil and coal bed methane - has already spent £568,000 and has been awarded a budget of £1.8m for this financial year.

There are already people living near fracking sites in the north of the country whose homes have been blighted - making insurance difficult and expensive, and significantly reducing property values.

"In pushing forward with their fracking fantasy, Cameron and co are riding roughshod over the climate science," said Natalie Bennett, leader of the Green Party.

"The science overwhelmingly indicates that 80% of known fossil fuel reserves need to be left underground if we are serious about meeting internationally agreed climate commitments."

She said fracking would add to the huge financial risk of the carbon bubble and called for the use of renewable and conservation technologies to build a sustainable energy policy.

"We need a government that doesn’t want to sacrifice our homes and communities for the profits of oil and gas firms while ignoring the pressing reality of climate change," she added.

The renewable wind power industry has had to deal with a broad range of challenges, particularly visual impact, and so far this doesn’t seem to be on the shale gas radar.

But type ‘shale gas rig’ into an internet search engine and select 'images' to see a taster of what might actually be in store for any community where drilling might take place.

We're likely to see the industrialisation of tracts of the British countryside, gas flaring in the home counties and a steady stream of trucks carrying contaminated water down rural lanes.

Production rates for the UK are expected to be lower than in the US because of lower pressure in UK basins, while costs might be higher because of demanding local environmental standards and the proximity of populated areas.

Analysis by Carbon Tracker estimates that if we are to contain greenhouse gas emissions at a level that preserves a reasonable chance of remaining below the 2C of global average temperature increase (considered a critical danger threshold), then four-fifths of known fossil fuel reserves need to remain locked in the ground.

The official Committee on Climate Change has warned that in the context of the UK’s legally binding climate-change targets, a new ‘dash for gas’ should be Plan Z, not Plan A.

All this makes for a risky backdrop to shale gas development in this country, which the Government seems determined to ignore in its public pronouncements and new round of licensing.

The industry will require major investment to get going and investors will need to be patient in getting a return, as going through the planning process and exploratory drilling will take years of expensive development before commercially useful quantities of gas are produced.

And no one really knows how much of gas can be got out, or how much that will cost both financially and to the environment at large.

Add to that the expectation that it will not in reality reduce energy prices, then the case for shale gas looks a lot more risky than proponents and the Government is suggesting.

The shale gas narrative and tax breaks presented by George Osborne a year ago are also, in part, based on the fear of being 'left behind'.

At the time Osborne said that a technological revolution based on government "getting out of the way of progress" is what we need. He couldn't be more wrong.

Where the country is being left behind, however, is in the development of new environmental technologies, including renewables and carbon capture. If we are to keep up in these areas, perhaps with some gas in the mix, it requires clear policy and leadership.

You can get away with small government on some issues - but not when it comes to energy. The UK needs a clear framework and strategy that sets out how we will secure our energy needs while meeting environmental goals. Right now we don't have that.

The current UK government - initially hailed by Cameron as ‘the greenest ever’ - is a liturgy of broken promises and short-term opportunism.

When it comes to energy policy and our long-term future it seems that little George has no idea. And neither has little Britain.

See also - Cameron talks up fracking and Fracking hell! from 2013.
The Lighthouse Keeper is written by Clive Simpson - for more information, commission enquiries or to re-publish any of his articles click here for contact information.

Government passes wind

Photo: Clive Simpson

British government policies are failing to support renewable energy despite more of the country’s electricity than ever before coming from renewable sources in the first part of the year.

Statistics from the Department of Energy and Climate change (DECC) reveal almost one fifth of electricity generated in Britain came from wind farms or other green technologies in the first three months of 2014.

New wind farms, strong winds and a good winter for hydro power plants sent renewable energy generation surging to 19.4% of all electricity from January to March.

The power produced was enough for about 15 million homes during the quarter and the figure is up from about 12% compared to the same period last year.

The figures were welcomed by green energy entrepreneur Dale Vince, founder of Ecotricity*, but he warned that government policies would severely limit further expansion of green power generation.

"Making our own energy here in Britain from green sources is the only way to keep our energy bills down and meet our climate targets," he said.

"To see Britain 20% powered by green energy is the first quarter of this year is fantastic - we've come a long way in a few years.

"Unfortunately we may not get much further with this government which is set firmly against the green energy industry and is in favour of fracking and nuclear power."

The DECC data reports the total amount of electricity generated by all forms of renewable power reached 18.1 terrawatt hours in the first three months of this year - up 43% on the same period last year.

Across the whole of 2013, the amount of electricity generated from renewable energy sources, including solar, hydro and biomass, was up by 30% on 2012. Offshore wind rose the most – by 52% – but solar was also up by 51%, while hydro generation fell by 11%, reflecting lower rainfall.

The DECC data reveals that the price of electricity for domestic customers was up by 5.9% in real terms quarter on quarter – the same figure as recorded for industrial electricity prices.

Jennifer Webber of RenewableUK, the renewable energy trade association, said: "Onshore wind is delivering today and it is deeply illogical to talk about limiting its potential.

"The government would have been even further behind its energy targets without the strong performance of wind last year. That's why we need to ensure that there's continued investment in both onshore and offshore wind."

When it comes to power generation we certainly live in a topsy turvy world.

Already this month more than 100 right-wing Conservative MPs have signed a letter urging the prime minister to further cut subsidies to onshore wind farms – beyond the planned 10% reduction already announced.

Apart from arguments over cost subsidies, the most common objection to wind turbines is they spoil the view. This despite much of our countryside having been blighted for years by countless miles of ugly power pylons and electricity cabling.

Yet, compared to a fracking well (coming soon to a location near you) or pollution spilling from a gas-fired power station, the symmetric beauty of wind turbines appear serene and unobtrusive.

Where prejudice - and the ‘need’ to preserve previously unremarkable or average ‘views’ - trump the very real needs of energy provision and protecting our future it is surely time to look at things with a new perspective?

Ed Milliband, leader of the Labour party, said in London yesterday that the country has a "decades-long problem" of short-term decision-making by successive governments.

Coherent long-term strategies are desperately needed in many areas and nowhere is this more important than in national energy policy and the renewables market.


*Ecotricity, one of the country's small energy suppliers is based in Stroud, Gloucestershire, and is the UK's leading supplier of green energy. It started supplying its customers with 100% green electricity from August 2013 and, according to its annual Progress Report, now sources ‘a unit of 100% green electricity' from its own windmills and sun park, or from the wholesale market, for every unit of electricity its customers use.

The Lighthouse Keeper is written by Clive Simpson - for more information, commission enquiries or to re-publish any of his articles click here for contact information

The Age of Miracles

Karen Walker-Thompson's novel ‘The Age of Miracles’ is not an obvious literary award winner though it is a compulsive read and contains a number of interesting themes and challenging ideas - all introduced as the result of the phenomenon of Earth’s rotation slowing.

My previous blog ‘How fragile we are’ looked at the novel’s apocalyptic catastrophe theme - the dire consequences to all life on Earth as a result of the planet’s rotation gradually slowing and therefore extending both day and night.

But there are more subtle implications also to be considered when looking at the effects exaggerated daylight and dark hours might have on the normal working of our own bodies.

Midway through the book at the beginning of chapter 17, Thompson-Walker writes: "Two thousand years of art and superstition would suggest that it is darkness that haunts us most... but dozens of experiments conducted in the aftermath of the slowing revealed that it was not darkness that tampered most with our moods - it was light."

The implication, though not the cause, of night turning into day is not a million miles from the theme adopted by The Lighthouse Keeper for two of this autumn’s blog essays - ‘Fear of the dark’ and ‘Blinded by the night’.

It is now well-established by the medical profession that working through the night and the influence of light after dark can affect our circadian rhythms and long-term health and well-being in significant ways.

In his 2012 paper ‘Light Pollution, Nuisance and Planning Laws in the UK’ Martin Morgan-Taylor, principal lecturer in law at Leicester’s De Montfort University, states that artificial lighting is known to cause "some fairly obvious negative effects on human health and well-being" - in as much as floodlighting or illuminated advertising hoardings may disturb sleep by shining in bedroom windows.

"Indeed, it may be thought that sleeplessness may cause only temporary or negligible problems, but medical research is increasingly linking artificial light at night with some serious health effects, such as cancer and depression," he says.

"Other research indicates that artificial light at night may general disrupt human circadian rhythms."

In addressing the question of why this might by the case, Prof Morgan-Taylor pins the likely cause on what is known is that ‘white’ or ‘blue rich’ lighting, which mimics natural daylight and is being increasingly used at night.

"This type of light particularly suppresses the production of a circadian rhythm hormone called Melotin, so disturbing circadian rhythms," he states. Melotin is believed to be a powerful anti-oxidant that helps to ward off some human cancers.

"In other words, an avoidable exposure to ‘white/blue rich’ light at night may increase a person’s susceptibility to some cancers - and we are increasing our use of this form of lighting at night," he adds.

In ‘The Age of Miracles’ the world at large is thrust into ever-lengthening days and nights as Earth slows gradually from its standard 24 hour rotation.

At first the consequences are manageable, more of an inconvenience, but as the daylight hours stretch into periods of 30 and then 40 hours, and likewise the night, the effects on daily life become ever more pronounced and difficult. 

The terminator dividing day from night across Earth as seen
from the International Space Station.

The novel takes the concept of our bodies adapting to unnatural light patterns to a whole new level - but in considering current light pollution levels across the developed world (in England it increased by 24 percent between 1993 and 2000) the extrapolation is valuable.

The first chapter of Genesis in the Bible states that God ‘divided the light from the darkness’, which in Biblical terms can be viewed as both symbolic as well as being a statement about the natural environment. In essence we need them both because light allows us to see and darkness gives us an opportunity to sleep.

By lighting our neighbourhoods, towns and cities to excess and flooding our yards with unnecessary light we are wasting energy and undoubttedly contributing to climate change. In a more subtle way we may also be tampering with the laws of nature - and perhaps even creation itself. 

Back to the blues

There is sometimes a fine line when it comes to discerning the difference between the colours of green and blue - as British Prime Minister David Cameron has been finding out.

His bold claim on coming to power to be leading the "greenest government ever" seems to be turning into something of a wistful ruse at best.

The summer’s unresolved fracas over fracking for shale gas didn’t really help matters but the latest salver came from a more unlikely source - a Conservative party donor.

Alexander Temarko, a significant British energy investor, claims investors in renewable technologies are being scared off by "seriously mis-leading" messages from the Government.

The Russian businessman, who has made donations in excess of £50,000 to the Conservative party, believes the Government is now paying little more than "lip service" to renewable energy.

Temarko says that failing to provide the clear targets investors need before committing to long term green electricity generation projects is squandering the opportunity to create thousands of jobs and generate billions of pounds in revenues.

The charge is levelled equally at the Prime Minister, his Chancellor of the Exchequer, George Osborne, and, to a lesser extent, at Ed Davey, the Energy and Climate Change Secretary.

In fairness, Davey campaigned to include a requirement in the Energy Bill - currently progressing through Parliament - that would have required the UK's electricity supply to become almost entirely ‘green' by 2030.

But Osborne replaced the target with less onerous wording that grants the Government the power from 2016 to require Britain's electricity supply to become almost entirely green only at some point in the future and should it choose to do so.

All this comes at a time when the country’s profit-hungry big six energy companies are about to announce another inflation-busting price hike to gas and electricity prices.

An exception to the rule is Ecotricity which announced mid-September that it was ending its ‘Big Six price match’ under which the small energy provider had matched each Big Six standard tariff in their home regions.

This delivered green energy for the price of brown and meant that, for most people in Britain, it costs no more to be with Ecotricity.

The company’s new pricing promise is that it will charge less than each of the Big Six standard tariffs - delivering green energy for less than the price of brown.

In the meantime, the Prime Minister and his Government’s ‘green' credentials have shifted chamaeleon-like back through the political colour spectrum to the traditional Conservative party blue.

And Temarko is right in one sense - the lack of a sound, long term energy policy is doing no one in the UK any favours.

This piece was originally scheduled for publication on 21 September 2013 but the Lighthouse Keeper was unable to access his blog due to Chinese internet restrictions whilst on assignment in Beijing and so it has been published retrospectively. The title is inspired by the album of the same name from the late Gary Moore (1952 – 2011), a musician from Belfast, Northern Ireland, best recognised as a blues rock guitarist and singer. In a career dating back to the 1960s, Moore played with artists including Phil Lynott and Brian Downey and was a member of the Irish rock band Thin Lizzy.

RSPB's fracking objection

The media hiatus in the fracking for shale gas frenzy - which graced the front pages for several weeks during the summer - has left room for some more reasoned debate and comment.

The RSPB, for instance, has waded into the issue by lodging objections to proposals to drill for shale gas and oil in Lancashire and West Sussex, citing that regulations are inadequate to ensure water, landscapes and wildlife are protected.

These are the first formal objections to fracking from the RSPB. The drilling proposal at Singleton, Lancashire, is less than a mile from an internationally important area for pink-footed geese and whooper swans.

The society is also protesting against drilling at Balcombe, West Sussex - the focus of large summer protests - on the grounds that no environmental impact assessment has been carried out.

In both written objections the charity also says that increasing oil and gas use will reduce the UK's chances of meeting climate change targets.

Harry Huyton, head of climate and energy policy at the RSPB, said: "Balcombe hit the headlines as the battleground in the debate over fracking. The public there are rightly concerned about the impact this will have on their countryside.

"We have looked closely at the rules in place to police drilling for shale gas, and they are simply not robust enough to ensure that our water, our landscapes and our wildlife are safe."

Huyton also said that Cuadrilla's proposed operations in Lancashire could damage populations of geese and swans. "This area is protected by European law because it is so valuable for wildlife and the company has done nothing to investigate what damage their activities could do to it," he claimed.

The RSPB says that Government figures show the potential for 5,000 sites and a total of up to 100,000 wells in the north of England.

"The idea that these will have a benign impact on the countryside is very difficult to believe," said Huyton.

"This is all in too much of a hurry – the regulations simply aren't in place," he added. "If Cuadrilla did their assessments and found there wasn't a serious concern, we'd accept that. But no assessments have been done."

The group's other main objection is that a push for shale gas will divert funds and attention from the UK's previously stated goal of having an electricity system almost completely powered by ‘clean' energy by 2030.

This piece was originally scheduled for publication on 20 September 2013 but the Lighthouse Keeper was unable to access his blog due to Chinese internet restrictions whilst on assignment in Beijing and so has been published retrospectively

Fracking hell!

So far the market town of Spalding in South Lincolnshire seems to have escaped the rush for shale gas. But the town already has one gas fired power station dominating the flat Fenland landscape, with another one to be built alongside it on the way. And if our local MPs have anything to do with it fracking for shale gas won't be far behind...

For some UK Government ministers and MPs - including Spalding's John Hayes (South Holland and The Deepings) and Peterborough’s Stewart Jackson - the enthusiasm for mining shale gas is in part fuelled by a passionate hatred of wind power based largely on the latter’s aesthetic impact on local landscapes.

Blinkered by what they see as a golden economic opportunity, it is perhaps not surprising that such MPs, along with the coalition Government in general, assume the extraction of shale gas offers a palatable and commercially attractive energy source.

Fracking - short for hydraulic fracturing - involves drilling deep underground and releasing a high-pressure mix of water, sand and hundreds of chemicals to crack rocks and release gas stored inside.

Preparing the groundwork for last week’s Government tax-break announcement for fracking prospectors, Jackson used his weekly column in the Peterborough Telegraph (5 July) to promote the shale gas case.

He wrote: "Shale gas exploration gives us another once in a lifetime opportunity with clean, cheap, plentiful and safe shale gas - rather than the lights on the blink and half a million glass panels around Newborough [near Peterborough] and windfarms to boot!

"Government has wised up to the economically damaging Liberal Democrat-inspired green policies costing the UK tens of billions of pounds," he declared.

Hayes, a former energy minister, has clearly stated his opposition to development of many forms of renewable energy and has lent his support to numerous anti-windfarm campaigns across his South Holland constituency, often on the grounds that they would ‘spoil’ the local view and amenity.

The wind power industry has had to deal with a broad range of challenges, particularly visual impact. So far this doesn’t seem to be on the shale gas radar.

But type ‘shale gas rig’ into an internet search engine and select ‘images' to see a taster of what might actually be in store for any rural community where drilling might take place.

We're likely to see the industrialisation of tracts of the British countryside, gas flaring in the home counties and a steady stream of trucks carrying contaminated water down rural lanes.
 

 
Another problem with fracking for gas is that the drilling process releases a host of undesirable by-products into the atmosphere, including large quantities of methane.

Strategic opposition to the development of shale gas in the UK rests on the fact that such large-scale exploitation is not compatible with meeting our targets to reduce greenhouse gas emissions.

Analysis by Carbon Tracker estimates that if we are to contain greenhouse gas emissions at a level that preserves a reasonable chance of remaining below the 2C of global average temperature increase (considered a critical danger threshold), then four-fifths of known fossil fuel reserves need to remain locked in the ground.

The official Committee on Climate Change has warned that in the context of the UK’s legally binding climate-change targets, a new ‘dash for gas’ should be Plan Z, not Plan A.

All this makes for a risky backdrop to shale gas development in this country, which the Government seems determined to ignore in its public pronouncements.

The industry will require major investment to get going and investors will need to be patient in getting a return, as going through the planning process and exploratory drilling will take years of expensive development before commercially useful quantities of gas are produced.

And no one really knows how much of gas can be got out, or how much that will cost both financially and to the environment at large.

Production rates for the UK are expected to be lower than in the US because of lower pressure in UK basins, while costs might be higher because of demanding local environmental standards and the proximity of populated areas.

Add to that the expectation that it will not in reality reduce energy prices, then the case for shale gas looks a lot more risky than proponents and our Government suggest.

But where there are potentially large amounts of money to be made there are also vested interests at stake.

So far the Prime Minister David Cameron has managed to dodge the claim that he bowed to pressure from lobbyists such as the Tory election strategist Lynton Crosby over the Government decision to give tax breaks for fracking.

Last week The Independent newspaper detailed the work that Mr Crosby's lobbying firm, Crosby Textor, does on behalf of companies promoting the controversial method of extracting shale gas.

The shale gas narrative and tax break presented by George Osborne last week is also, in part, based on the fear of being ‘left behind'.

Osborne’s Environment Minister colleague Owen Paterson (who dismayed climate scientists by expressing doubts as to the human impact on the climate system) used the same phrase in his promotion of GM crops.

Both Osborne and Paterson say that a technological revolution based on government getting out of the way of progress is what we need. They couldn't be more wrong.

Where we are being left behind is in the development of new environmental technologies, including renewables and carbon capture. If we are to keep up in these areas, perhaps with some gas in the mix, it requires clear policy.

You can get away with small government on some issues, but not on energy. The UK needs a clear framework and strategy that sets out how we will secure our energy needs while meeting environmental goals. Right now we don't have that.

The dash for shale - with all its inherent risks and uncertainties - ignores the massive growth potential of the renewable sector and the vital long-term goal of reducing carbon emissions.

Look at Germany, for instance. Some 26 per cent of its energy now comes from renewable sources. And its renewables industry is growing because it gets tax breaks. Germany's economy is larger, more successful and infinitely more resilient than the UK's. So who is right?

The current UK Government - initially hailed by Cameron as ‘the greenest ever’ - is a liturgy of broken promises and short-term opportunism. When it comes to energy policy and the long-term future of our country it seems that little George has no idea. And neither has little Britain.


The Lighthouse Keeper is written by Clive Simpson - for more information, commission enquiries or to re-publish any of his articles click here for contact information