Renewables | Claverton Group

Biomethane vehicles open up green driving

UK business can now take advantage of the first mass scale second generation biofuel to be produced from waste. This is as a result of the launch in the UK of 3 brand new vehicles that have been developed by Volkswagen and Mercedes Benz to run on 100% renewable methane (biomethane)

The Volkswagen Caddy Ecofuel is ideal for companies who operate small white vans or far airport taxis who need 7 seats. The Sprinter NGT is the perfect large van, ideal for supermarkets and with thousands of applications. The Econic articulated truck is ideal for deliveries into cities and between distribution centres. All these vehicles have low environmental impact in terms of noise, NOX and particulates but it is their carbon neutrality when fuelled on biomethane that is transformational.

Dr Maitland Mackie discusses "a second agricultural revolution" based on community funding of wind energy assets

Dr Maitland Mackie, BSc (Agriculture), MA Hons (Economics), CBE, LL.D, FRAGS Existing power companies are scouring the country for sites to build wind turbines. While this offers some profit for landowners Dr Maitland Mackie has other ideas. His recently formed company proposes that those in rural areas retain most, if not all, of the profits available – nothing less than a new agricultural revolution.

Maitland, a comparatively new member of the Claverton group, formed the idea for an energy company owned by the rural sector having seen the financial and aesthetic success of the turbines installed by his three offspring who now run the family dairy and ice cream business in Aberdeenshire (Maitland says he now basks in the reflected glory of their efforts).

Danish Wind Power and Electricity Export in 2007

By Paul Frederik-Bach, ex Director Danish Western Power Grid.

Denmark is considered to be a frontrunner in the use of wind power. In 2007 the generation of wind energy in west Denmark was 5.6 TWh or 26 % of the electricity consumption.

In east Denmark 1.6 TWh wind energy was generated, which is 11 % of the electricity consumption.

The normal interpretation is that 20

Bio-methane fuelled vehicles – John Baldwin CNG Services

Year 2008 may well be recognised as a turning point in the journey away from fossil fuels and this has major implications for the waste management industry. The increase in oil price to $140/bbl is the market signaling that, to use the words of Shell CEO van der Veer, ‘easy oil’ is running out. The large oil fields that have supplied the world with oil are starting to decline and new resources, such as oil sands in Canada, have much higher levels of CO2 emissions associated with their extraction.

At the same time, countries like Nigeria are capturing and liquefying the natural gas (to make LNG) that is a by product of oil production. Nigeria is forecasting LNG production of around 60 million tones per annum by 2012, bringing in around $60 billion of income – not a bad return for what was flared off as a waste product until 1999. High natural gas prices in the US are also bringing forward huge resources of ‘tight’ natural gas that are now economic to produce. Such gas needs more wells than normal gas and so requires the higher gas prices we have now – historically low natural gas prices in the US have acted to leave the ‘tight gas’ in the ground but it is now economic to bring it to market.

Paul-Frederik Bach, ex-Director of West Denmark Power talks about Danish Windpower and smart grids.

Paul-Frederik – who has been a stalwart member of the group and attended 3 previous Conferences, could not make the last meeting due to illness. He was kind enough to give us this presentation which came with the following note:

Dear Chris, Dave and Fred,

The Claverton group is a fascinating forum, because different and interesting people meet there. Of course I am disappointed that I cannot attend the conference. I hope to be present at a future event.

I attach a brief PowerPoint (7 slides) to meet your request. I have tried to summarize my views. You are welcome to use it as you may prefer, for presentation, for handout or for other purposes. Slide 4 is a summary of my Platts paper (which was written for the Claverton discussions from the beginning).

The conference programme seems to be well packed with interesting contributions. I hope that the papers will be available at the web site.

Uttlesford – the most CO2 per household in England – "100% renewable is possible" says Altechnica study.

Dr Derek Taylor, Altechnica and OU Open University Energy & Environment Research Unit

The Altechnica study on Renewable Energy potential in Uttlesford (commissioned by Uttlesford Futures) study shows that it would be potentially possible to ultimately obtain all of the household electricity, space & water heating needs and power personal cars from 100% renewable energy from within Uttlesford.

Uttlesford is the East of England District located in the North West corner of Essex that borders Cambridgeshire and Hertfordshire and includes Saffron Walden, Great Dunmow and Stansted Airport within its boundaries. – Prior to Uttlesford Futures commissioning the study, Uttlesford District had been reported as emitting the most CO2 per household in England.

This study showed that domestic heat provision, electricity and potentiall

Optimal central power station back up for wind – what is Claverton view?

The old power-station retention concept does require a lot of maintenance work to keep them open.
Long start up times are also an issue particularly if the turbine and the whole of the steam system is cold.
In comparison the engine based local CHP option can operate happily with minimal maintenance and with remote unmanned start up and operation.

The benefits from wind are clear they replace fossil fuel but are not effective as replacement capacity unless linked to a sufficiently large area of the world to ensure some wind all the time.

2008 Claverton Energy Group Conference Papers Available

Those that have been forwarded in text format have been published as News Articles. Those in PowerPoint or PDF format have been uploaded to the website, and can be downloaded for reading at:

What is Microgeneration? And what is the most cost effective in terms of CO2 reduction

The UK Government definition of Microgeneration[1] applies to a rather surprising mix of heat and power generating technologies with a thermal output below 45kWt or an electrical output of 50kWe. It covers electrical generation from wind, solar photovoltaics (PV) and hydro, and heat generation from biomass, solar thermal and heat pumps as well as micro CHP which produces heat and power from renewable or fossil fuels. It is not just another term for small scale renewables, but comprises a portfolio of low carbon technologies.

There has been a tendency amongst advocates[2] and sceptics[3] alike to lump all Microgeneration technologies together, either as “all good” or “all bad”. This is particularly unhelpful when attempting to understand the potential contribution Microgeneration can make to UK energy strategy and it is important that we understand the particular characteristics and potential role of each technology.

The Sahara Forest Project – A new source of fresh water, food and energy

The world is running short of fresh water. With agriculture accounting for some 70% of all water

used, the water shortage is closely linked to food production and economic development. The

provision of clean water is a pre-condition to life, health and economic development and the lack

of water in many parts of the world is the root cause of much suffering and poverty. Present

methods of supplying water in arid regions include: over-abstraction from ground reserves,

diverting water from other regions and energy-intensive desalination. None of these methods are

sustainable in the long term and inequitable distribution leads to conflict. To make matters

worse, global warming is tending to make dry areas drier and wet areas wetter. Since the 1980’s,

rainfall has increased in several large regions of the world, including eastern North and South

America and northern Europe, while drying has been observed in the Sahel, the Mediterranean,

southern Africa, Australia and parts of Asia.