A recent UK Department for Transport (DfT) survey provides useful data on attitudes towards climate change and on cutting emissions. The fieldwork was carried out in August 2009 and so will not incorporate any effects from the recent criticisms of the IPPC and the revealing of a large number of emails written by CRU scientists at the University of East Anglia. The most interesting feature of the DfT research is that it continues to show that a very substantial majority of people believe that the climate is changing but that relatively few are prepared to welcome potentially painful changes to lifestyle, such as cutting the number of flights taken. The percentages of people suggesting high levels of concern about global warming are generally down about 3-5% since 2006.Read More
Today's UK government announcement on incentives for small scale renewables has three unexpected features: a) The payments for renewable heat, such as the home burning of wood to replace gas or rooftop solar hot water, are much higher than predicted.
b) The figures for wind have risen since the autumn consultation document. This means that well-located wind turbines of the 6-15kW size are likely to produce returns above 13% per year.
c) The figures for solar PV have been increased slightly, but do not offer returns as good as wind. Importantly, the government has also signalled that it will allow PV installed at any time over the next 28 months to capture the full feed-in tariff. Previously, the tariff declined for installations made after March 2011.
An earlier article on this topic which looks in more detail on the incentives to take up the new 'feed-in tariffs' is here.Read More
Call or write to Black & Decker to demand that the company launches its Thermal Leak Detector in Europe and elsewhere. This is the single most useful energy saving device I have ever seen. Europeans can buy it from Amazon.com in the States, but shipping and customs charges make it quite expensive. Let's get it here before the winter ends.Read More
Tools for carefully estimating carbon footprints have tended to be difficult to use and clunky in appearance. Two recently introduced calculators make real improvements and allow individuals and companies to carry out effective analysis of carbon emissions.Read More
UK supermarkets and DIY chains stock up to twenty different types of energy efficient light bulbs but most households have some light fittings that cannot use any of these bulbs. There are several hundred different combinations of fitting, shape and power. Some internet sites, such as www.lightbulbs-direct.com/article/energy-saving or www.gogreenlights.co.uk offer a very wide range of low-energy-use bulbs including many unusual types you cannot find in shops. One problem remains: it is not always possible to tell whether the bulb you see on a webpage will actually fit your lamp holder or whether it will be the correct brightness. Light-bulb Libaries may be the answer.Read More
If you buy just one new appliance in 2010, make it a really efficient fridge-freezer. The improvements in the energy use of the best fridge-freezers have been really impressive in the last few years. If you have an old refrigerator, it may be responsible for as much as a sixth of your electricity bill. A good new machine might use less than a half as much power, particularly if it is not too large. A second benefit is that by choosing to buy a really efficient refrigerator you will be sending a clear signal to the manufacturers that energy consumption matters. An impressive new web site – www.energytariff.co.uk – allows you to compare the electricity used by almost all the appliances currently in UK shops. You can make well-informed choices from your computer.Read More
Let’s face it: energy efficiency is boring when compared to the (relative) excitement of developing new sources of low-carbon electricity or heat. The popular science magazines are full of articles on new forms of solar panel and the latest designs for wind turbines. Improving the insulation of ordinary homes, shifting to LED lighting or increasing the take-up of heat pumps rarely command the attention of editors.Read More
Wittingly or unwittingly, many manufacturers make it difficult to compare the electricity consumption of home appliances such as TVs and refrigerators. Although many appliances have been through standard EU tests and then been awarded a letter grade for energy efficiency, these grades are increasingly unhelpful in distinguishing between the excellent and the merely satisfactory. As in British school exams, an A grade doesn’t mean much because it covers such as wide range of performance.Read More
10:10, a campaign to get individuals and organisations to reduce their emissions by 10% in 2010 is launched today, 1 September. The idea is simple and has proved surprisingly easy to communicate so far. Of course it has helped that the human tornado Franny Armstrong has been pushing it.Read More
After months of deliberation, the UK government has announced a range of illustrative figures for feed-in tariffs (FiTs). FiTs are fixed payments made to the owners of small generating stations for the electricity that they export to the grid. Micro-generators need high payments to justify their expensive investment in buying and installing green generation.Read More
An important recent paper looked at the links between economic prosperity and carbon footprint. It compared the average emissions per head in 73 different countries at all different stages in development. Unsurprisingly, it showed that richer countries have much higher greenhouse gas outputs. The interesting and somewhat depressing finding is that a country with 10% higher GDP per head than another will generally have emissions about 8% higher. The correlation is strong – very few countries diverge much from the norm for their level of income.Read More
(The information in this article has been updated by a more optimistic article that looks at the before and after experience of a ASHP installation in Oxford, Please go to http://www.carboncommentary.com/2010/08/03/1632) Small heat pumps are increasingly used to provide space and water heating in UK homes. This trend is strongly encouraged by policy-makers and the government’s proposed Renewable Heat Incentive will add further financial support. The enthusiasm for this expensive technology should be moderated: for a home on the mains gas network, the savings in money will be small. Carbon benefits are probable but far from guaranteed. Moreover, air source heat pumps are unlikely to be able to heat many older homes effectively. Government, manufacturers, and installers need to be very much more cautious in encouraging the use of heat pumps and should use far more conservative payback assumptions. Heat pumps will eventually be a good investment for homeowners but probably not yet.Read More
Electricity demand has fallen substantially in the last couple of years and shows no sign of recovery. The cause could be: * The impact of economic slowdown * Better energy efficiency * Demand reduction because of the high prices seen in recent years.
If the cause is the contraction in the economy, then we can expect electricity use to rise again when growth resumes. On other hand if it is energy efficiency, then it is reasonable to expect that the reduction will persist. Electricity demand is usually thought to be insensitive to the price of power. If it is high prices that are driving usage reductions, we have gained important information about how to reduce electricity use, and thus carbon emissions.
The conclusion of the analysis in this short note is that almost all of the reduction in energy demand comes from cuts in usage in big industrial and commercial users. This means that the most likely cause of the cut is the fall in economic activity. Household demand seems to have remained about constant.Read More
People like me who buy solar panels tend to become unreasonably fond of them. Many homeowners come to regard these silent blocks of silicon on our roofs as part of the family. I’m also particularly proud that our panels are registered at Ofgem, the utilities regulator, as Power Station 571. The reason for going through the cumbersome process to convince Ofgem that my silicon should be listed alongside Drax and Sizewell B was to benefit from the government incentive scheme for renewable electricity generation.Read More
Government officials are searching for policies that will meet the twin aims of providing jobs and meeting the UK’s climate change targets. It is proving a difficult task. The easiest ways of reducing fossil fuel use will probably not create many new jobs in the UK. All large wind turbines are built abroad and although the construction work on a nuclear power station will generate a few thousand jobs, most of the key components will need to come from Europe and Japan. So where are the opportunities? I think two major areas stand out as excellent ways of generating jobs quickly without also dragging in expensive imports or sharply raising prices.Read More
We didn’t make much progress reducing emissions when times were good. Will the looming depression makes things worse or better? The discussion of this issue, at least in the UK, tends to be superficial. The only question asked seems to be ‘will people buy less eco-bling when times are hard?’Read More
Most major countries in Europe have decided to focus on one or two technologies to reduce carbon emissions. By making concentrated investments in one or two promising areas these countries are likely to achieve substantial cost reductions and rapid increases in deployment. By contrast, the UK is dabbling ineffectually in several areas and achieving little. Despite having large resources of renewable energy sources, the UK’s effort is diffuse, trivial in scope and clearly insufficient. We have almost the lowest percentage of our energy coming from low-carbon sources in the EU.Read More