Friday, 1 February 2008
Cold Shoulder for Patio Heaters
What's more, most of this energy (and CO2) is wasted. The typical heater burns across a circular grill at a high level; although some radiant heat is generated, most of the heat simply rises up above the device, or is convected around the "cap".
Enter the DIY retailers. So far, they have sold an estimated 1.2 million of these highly inefficient and quite ineffective units. But suddenly they have come over "all green" and are trumpeting their concern for the environment by stopping sales. Wyevale took the lead last May, saving its customers from a complete summer of patio heating. B&Q followed last week, with Homebase jumping on the bandwagon this week. This is to be welcomed, but B&Q admit they have 20,000 of the things still waiting to be sold - and they are not going to be scrapped.
The cynic in me wonders if there's another reason. Patio heaters are ineffective: they may impress the neighbours, but they don't keep you warm. The Government's Market Transformation Programme have compared cumulative sales of heaters (1.2mn) with annual sales of "alfresco" gas canisters - and deduced that the average unit is used between 10 and 21 hours a year: many heaters, they suspect, are rarely or never used, staying locked inside the garden shed. And if B&Q have such a large stock now, I suspect that sales may not be what they used to be, as the public have cooled on the idea of patio heating. Axe a slow-selling line and claim greenie points - it's almost to good to be true!
Hiding behind the consumer patio heater is a much more pernicious heater - the pub patio heater. These are used, especially since the smoking ban, and - unlike domestic heaters - are use year-round, not just on balmy evenings. Although some are the same as domestic LPG units, most are electric to befit from lower running costs. Electric units are also more controllable: they can be centrally switched on or off by the pub staff with a second point-of-use push button for use by customers, which will give a 10 minute burst of heat. Unlike gas heaters, they are primarily radiant, and use a rear reflector to direct the heat in a narrowly focused pool. But they're not all good; a typical 1.5kW heater in use for 2371 days a year and 2 hours on a day (assuming good controls) will still result in almost 400kg of CO2 annually. And most pubs will have several such heaters, to cater for several different groups of smokers. When you realise that around half Britain 51,000 pubs (not the mention its 48,000 restaurants) may have installed these heaters to beat the smoking ban, that's a lot of CO2! Estimates vary, but they could lead to anywhere between 100,000 and 200,000 tonnes of CO2 - perhaps equivalent to the emissions from 50,000 cars.
1 These figures come from the MTP (www.mtprog.com)
Friday, 18 January 2008
We can make 15% renewables by 2020
This is a challenging but achievable target. To meet the target, we will need to do three things:
- Continue to focus on energy efficiency, in part to limit total demand. As renewably sourced energy is likely to be more expensive, reducing demand will also help limit total energy bills. This is especially important for lower-income consumers, and - at the same time that electricity generation companies are moving into renewables - electricity, gas and heating oil distribution firms should be incentivised to expand insulation and other conservation schemes.
- Identify key renewable energy sectors to provide large scale electricity generation. Historically the UK Government has mainly relied on the market, with only limited intervention through support mechanisms such as the non fossil fuel order (NFFO). Although this has tended to produce least cost renewables, it has also resulted in rather a patchwork of technologies, with none achieving critical mass. In turn, this has allowed European competitors in countries such as Germany, Austria, Spain or Denmark build up strong positions in key renewable energy fields. A little more intervention may allow the UK to be a leader, rather than a follower, in offshore technologies2 (wind, wave and tidal stream). However, it should be cautious before attempting to impose mega-projects such as the Severn barrage in a desperate attempt to leap towards the 20% target.
- Large scale electricity generation should be matched by support for smaller scale heat generation especially in the domestic and SME sectors. This should focus on proven technologies such as solar water heating, ground source heat pumps and modern biomass systems.
But we can meet the targets, and we can do so in a way that is environmentally friendly and not financially crippling if we treat them intelligently and with resolve.
1 See BBC News Report, 18/1/08
2 This may be changing; John Hutton (Minister for Business, Enterprise & Regulatory Reform) is quoted in the house magazine of the British Wind Energy Association (realPower) as having said "by 2020 enough electricity could be generated off our shores to power the equivalent of all of the UK's homes".
Wednesday, 19 December 2007
Has the USA started getting the message on CO2 emissions?
The proposals were part of a wider Energy Bill passed by the senate at the end of last week (13 December). The Energy Bill did however lose two other key environmental elements, one of which would have required utilities to get 15% of their electricity from renewable sources, and the other which would have eliminated huge tax breaks for oil companies. These were removed in response to a likely veto from President Bush.
The Energy Bill also contains a requirement to increase by nearly fivefold US production of renewable motor fuels like ethanol to 83 billion litres by 2022, although this may, as the EnergyDon has noted before, cause more problems than solutions, leading to rising food prices and a potential shortage of corn and soya beans for food uses. (There is also worrying evidence that the US Midwest may run out of irrigation water from underground aquifers, but that's another story...)
Electricity companies in Southern States lobbied strongly against the 15% renewable electricity provision, arguing there are few renewable energy sources like wind in their part of the USA, in contrast to plentiful (and polluting) supplies of cheap coal. No wind along the Gulf Coast – now does that sound right?
While the cut-down energy bill might not be as environmentally benign as its sponsors had hoped, it still represents progress. It is to be hoped that a greener White House in 2008 will allow the change of reintroducing some of the elements lost this year.
Meanwhile the European Commission has confirmed its plans to table draft legislation on this week to reduce CO2 emissions from new cars, even though the final details of the plan appear to be uncertain. In particular, the Commission may allow car manufacturers to form emissions groups for the purpose of calculating average fleet emissions. This would be similar to a basic form of emissions trading, where producers of larger vehicles could pay the makers of smaller cars to offset their higher emissions.
The European Commission is also expected to try and differentiate between different car classes in meeting the anticipated overall target of 130gCO2/km by 2012. The calculation will probably be based on three variables, including the weight of the car, in an apparent concession to German manufacturers which manufacture significantly large (and so heavier) cars than the EU average.
So does the new action in the USA mean that it is catching up the European Union, and is this something that we should be pleased about? To answer the second question first, any progress in improving the lamentably bad US fuel economy standards has to be welcomed. However, if they reach 35 miles per US gallon by 2020, they will still be no further forward than we are now, and the EU's proposed standards, while watered down from earlier proposals of 120gCO2/km, will still be 16% better and 8 years earlier.
But there is another more serious problem. Historically the USA has defended its large, inefficient vehicles by pointing out that their country is large, with a severe climate and long distances. To some extent this has been a self-fulfilling prophecy. US cities suffer from a vast urban sprawl, linked by traffic-clogged freeways, with in most cases few public transport alternatives. If you are sitting in a jam on the Santa Monica freeway in 90° heat, for example, you expect a bit of space in which to stretch and a nicely air-conditioned vehicle. To overcome America's dependency on oil will require more than smaller or more fuel-efficient cars; it will also need a re-think about how America does business and builds itself.
Wednesday, 12 December 2007
Australia, China and Climate Change
Clearly this ratification is to be welcomed, even though it is 10 years (yesterday!) since the Kyoto protocol was first agreed. The US is now the only major country not to have ratified the treaty, which requires developed countries to cut their CO2 emissions but imposes no targets for developing countries.
We do not have the luxury of another ten years in which to prevaricate, and squabble among ourselves about which countries should do what. And yet, we see this happening in Bali at the moment, with China and the USA involved in some sort of game of chicken, trying to be the last to cross the road towards making meaningful emissions reductions.
While this brinkmanship is going on, emissions are continuing to rise globally, with China - in particular - continuing to build new power stations. The Financial Times estimates that this year around 90GW of new coal fired capacity will be opened in China (although perhaps 15% of this will replace older smaller and often illegal stations. This comes on the back of 102GW opened in China last year - an all-time record.
It would be wrong of us in the West though, to focus too much on China. Certainly, much of the dirty electricity generated is then used in inefficient manufacturing, compounding the problem. The Chinese admit that this additional coal-fired capacity would not be entirely needed if their burgeoning manufacturing industry was more energy efficient. But part of the reason that it is inefficient is due to an escalating demand for inexpensive products by the very countries in the West, such as the UK, that are complaining about its rising emissions. As we go to the shops this Christmas and load our baskets with cheap Chinese goods, we should remember that there is a high carbon cost as well as the low financial cost that we see.
To bring this full circle, China and Australia are both Pacific nations, joined loosely through APEC (the Asia-Pacific Economic Cooperation). The world is shifting away from Europe and the Americas in the 21st century; let's hope that the new realism about climate change in Australia can spread around the Pacific Rim.
Saturday, 1 December 2007
Of Bali and Golf Courses...
The Energydon won't be there. This is not because I am trying to save these CO2 emissions or because I have been put off by Bali's reputation as the being the Ibiza for Australians. It's simply because I wasn't invited: I could have paid my way, but what use can a lone voice be among 12,000 others? That might seem a strange question from a blogger who is trying to make their voice heard in the blogosphere, where there are massively more voices. But in keeping the theme of this particular blog, that lone vice might be better heard back at home.
So for the second part of this blog, I will go not so far from home - just up into Scotland, where Donald Trump is trying to gain permission to build a £1 billion golf resort North of Aberdeen. Seen by some as having parallels with the film "Local Hero", the issues are not wholly straightforward; local business leaders have apparently hailed the scheme as a "once in a generation" chance to shift the economy away from reliance on the oil and gas industries. Anything that move away from fossil fuel exploitation to encouraging healthy exercise (golf???) should be encouraged, perhaps? Well, no, as the number of visitors to this resort (and associated CO2 emissions) are likely to completely dwarf the 12,000 delegates to Bali.
And there is another big question mark about how sustainable this sort of development is. The proposals are to site a luxury hotel, timeshare properties and over 500 homes on unspoilt links 12 miles North of Aberdeen, conveniently close to its airport. The proposed development area includes sites of special scientific interest. Martin Ford, chairman of Aberdeenshire's strategic resources committee used his casting vote to veto the project yesterday, despite it having been approved earlier by the local planning committee. He is quoted1 as saying "The golf course can go somewhere else; species and habitats can't. The risk to the local environment and wildlife was too high a price to pay. At the end of the day, this is not sustainable development because of the destruction of something that cannot be replaced. We are having a pistol held to our heads in the form of moral blackmail. We can only have it if we sell our soul." If this sounds strong stuff, Mr Ford - who has a doctorate in plant ecology, so knows the true value of the links area - concluded that "it was not an anti-golf decision [but] pro-due respect for an important conservation site".
I would like to echo Mr Hall's comments. His was a near-lone voice that could prevent real local environmental loss. We have to get the balance between sustainable and development right, and not to treat the phases "sustainable development" as an indivisible whole. And I hope that some of the delegates in Bali can think about his moral stand while they are enjoying the conference. But if I don't like their decisions, maybe I'll just have to buy a ticket for Poland instead...
1 Financial Times, 1 December 2007, p3.
Wednesday, 21 November 2007
US Green Car of The Year is not at all Green
It has been reported that the Chevrolet Tahoe Hybrid has been named 2008 “Green Car of the Year” by the US Magazine Green Car Journal at an event to coincide with the Los Angeles Auto Show. Although the judges included a number of well-known US environmentalists, from bodies such as the Worldwatch Institute, the Sierra Club and the World Resources Institute, the winning vehicle only returns 21 mpg in the city or 22 mpg on the highway. (These are per US gallon, equivalent to around 26 mpg in UK units, or 246gCO2/km.)
The editor of Green Car Journal, Ron Cogan, apparently hailed the choice as a “milestone,” because although SUVs are usually thought of as bad for the environment, the dual-mode hybrid system in the Tahoe “changes this dynamic with a fuel-efficiency improvement of up to 30 percent compared to similar vehicles equipped with a standard V-8.” All the short-listed cars were hybrids this year.
Now, I'm something of a fan of hybrid technology, seeing it as being an important first step towards genuinely low carbon vehicles. But 246gCO2/km is derisory; compare this with the 109gCO2/km for the Toyota Prius, or even the EU's "voluntary" target of 130gCO2/km for the average car sold and you should be able to see why. Indeed, even non-hybrid cars - such as the new diesel VW Polo BlueMotion - can just scrape in under 100gCO2/km - well under half the level of the Chevrolet Tahoe. And I haven't even started thinking about the embodied carbon in a large chunk of metal and plastic...
It's not valid to compare this with other SUVs. Most drivers do not need an SUV, and should not be encouraged to drive one by spurious greenwash. (For reasons that I shall not mention, I spent 20 chilly minutes standing at a road junction this morning scanning cars coming towards me. None of the SUVs had more than a single occupant.) This award is just another example of the worst sort of environmental claim being made, that may allow consumers to feel less guilty about their choices, but will get us nowhere towards a really sustainable energy economy.
Tuesday, 30 October 2007
Are Biofuels a Crime against Humanity?
A United Nations expert has condemned the growing use of crops to produce biofuels as a replacement for petrol as a crime against humanity.Now I'm not the right person to defend biofuels, as I have serious doubts myself about the effects on global food production and prices - witness the "tortilla riots" in Mexico, or rising beer prices worldwide - but as with the previous two blogs about risks, it is all relative. At current levels, even I doubt that many (if any) people are going hungry owing to biofuel production - the poorest and hungriest are more likely to eking a living from subsistence farming and suffering from the direct effects of climate change. And much of the BBC report seemed to be focusing on a little bit of EU-bashing, as they seemed to feel that the real cause of the problem was the EU Directive on Biofuels, which sets targets for each member state. Under this Directive, Britain will have to provide 5.75% of its road fuels from biofuels by 2010 - a high figure based on current levels, but probably achievable substantially from land that won't be competing with food crops2.The UN special rapporteur on the right to food, Jean Ziegler, said he feared biofuels would bring more hunger. The growth in the production of biofuels has helped to push the price of some crops to record levels.
Mr Ziegler's remarks, made at the UN headquarters in New York, are clearly designed to grab attention. He complained of an ill-conceived dash to convert foodstuffs such as maize and sugar into fuel, which created a recipe for disaster.
So I declined the BBC's opportunity, as although I felt that the emotive language used by Mr Ziegler was not really advancing the debate at all, his real target was probably the US support for bioethanol from corn, and I really did not want to start defending that. Certainly in the past, exports of surplus US grain have helped "feed the starving" (although they may also have undermined indigenous agriculture by making it easier for farmers to receive food aid than to attempt to grow their own crops on difficult land), and the diversion of grains (wheat as well as maize) into bioethanol reduces the surplus available for the needy. But in truth, the support for the US bioethanol industry looks as if it is as much targeted at providing a valid excuse for farm subsidies in swing political states, as towards attempting to combat climate change through biofuels.
And as the BBC didn't want to hear my views on how public transport and cycling might help solve the fossil fuel problem with minimal need for biofuels, I thought it better not to be drawn into this debate!
1 See BBC Americas website, 27 October 2007
2 It may however be competing (indirectly) with rain forest, especially if it's biodiesel from palm oil, produced in South East Asia, or bioethanol imported from Brazil. This bioethanol comes from highly efficient sugar plantations that do not directly lead to the cutting down of the Brazilian rain forest, but there is evidence that the use of land for fuel crops has led to ranching shifting away from the coast inland to the Amazon basin.