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Archive for the ‘energy’ Category

According to online energy auction house BuyEnergyOnline, during April 2007 UK gas wholesale prices rose by just 1% while electricity prices increased 13%, making the widest spark gap since deregulation. (more…)

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pellet delivery 2
Maurizio brought round our last one-tonne bag of wood pellets a few weeks ago and I’ve been meaning to post photos since. He’s been holding the last bag for us since last autumn when we only managed to get five of the six tonnes we’d bought into the pellet store.

We’ve now got plenty of pellets. A few too many, actually, because when you buy pellets you should a) buy in the summer when pricespellet delivery 1 are lower and b) buy as much as you can so you spread the cost of transport across as many tonnes as possible. We’ve now got enough pellets to get us through to the start of the heating season, which is a problem. If we buy in the next few months we won’t be able to fit more than 3 or 4 tonnes in the store because of our leftovers. If we buy in winter, we’ll buy at a premium and have to wait in line with everyone else. As a solution I’m hoping to find storage space somewhere (like Carletti’s barn or Marco’s cantina) so we can buy maybe 10 tonnes over the summer and transfer them to the pellet store as we need them.

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After I mocked Italy’s efforts to combat climate change, it turns out their funding for microgen (in particular photovoltaic panels) makes the UK’s policy look even more pathetic. If that were possible. (more…)

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A London borough used thermal imaging from the air to help identify properties with high heat loss and they’ve put the results online for anyone to see. Here’s the article in the The Times. And here’s the map showing the results.

I think it’s fantastic, provided the council follow it up with constructive advice to the worst homes and other buildings. Now what we need is a thermal version of Google Earth.

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bow drill 1In the Dorset woods last summer, I spent a day learning to make fire with a bow drill, starting with just a knife and a log. There were eight of us on this bushcraft course, each one tasked with making his own fire from scratch. We all worked in a charged silence and then eventually someone would get a fire going and he’d howl and hoot and punch the air. The others would look up enviously for a moment and then bend back down to their own bow drills.

In the evening around the campfire we talked about the lesson and some of the guys agreed that making fire was more satisfying that most things they’d accomplished in their professional lives. Fire is the foundation of civilisation – you could argue that fire defines humanity. We’re human, we’re more or less civilised, so making fire should be easy. But it isn’t – because it’s too simple.

By its nature, a complex society requires specialists. Most of us in Europe and the US have jobs that fill a tiny niche, jobs that would be useless in a simpler society; meanwhile our needs stay the same regardless of the complexity of the society we live in. Because of our specialisation, we often lack even the basic generalist skills that are needed to satisfy those needs. Instead, we specialists are reliant on other specialists (themselves reliant and yet other specialists), each of us operating many layers of abstraction away from the processes by which our needs are met. (more…)

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Found on the back of our electricity bill:

enelbill

When we moved into the house in October of last year there were bare incandescent bulbs hanging from the walls. We didn’t get around to putting in low energy bulbs (CFLs) until December, when we replaced about half. At that point, our average daily electricity consumption dropped 16%. In February we replaced the rest of the incandescents and suddenly we were using 32% less electricity than when we moved in.  (more…)

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The people in charge of the micro-CHP field trial at the Carbon Trust say their next interim report will be delayed until early June with the calculation methodology to follow soon after. So we’ll have to wait a little longer for the verdict on micro-CHP. Interestingly, the MicroGen units are still in the trial so maybe it will become clearer why BG Microgen closed down.

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pelletsAt least around 3000 kilometres. Here’s why:

The BRE gives a carbon intensity of 0.025kgCO2/kWh for biomass. This includes an allowance for planting, harvesting, processing, and delivery to point of use. See the 2001 emissions report and the 2003 update.

But we need to vary the emissions figure based on distance travelled. The European Environment Agency gives a figure of just over 0.12 kgCO2 per tonne per kilometre for road transport, quoted here. Even more pessimistic, the Royal Commission on Environmental Pollution says 0.18 – 0.27 kgCO2 per tonne per kilometre (see table 4.4). (more…)

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A few weeks ago at the end of a post about the myth of stone walls as insulation, I mentioned that high mass materials can be useful when included inside the insulation layer. Here’s why. (more…)

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WWF and IPA published a report on Wednesday showing that the carbon reduction due to the dash for gas in the 1990’s has been wiped out by increased use of coal. Here’s the press release.

It looks to me that the government hopes nuclear and CCS will save the day. This keeps the CBI and power industries happy and is the BIG, politically safe option. Renewables will continue to receive lip service and as for demand side reduction (the cheapest of all emissions reduction measures), it will be gently encouraged but never demanded. As Tony has told us before: you can’t expect people to change their lifestyles just to fight climate change.

By the way, does this mean we can stop using the unrealistic figure of 0.422 kgCO2/kWh for grid electricity? This was based on the carbon intensity falling, not rising! Someone call the BRE.

Anyway, the main points of the report can be summarised as:  (more…)

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