Owning and Operating Costs of Waste and Biomass Power Plants

Claverton Energy Conference, 23/24/25th October 2009

Dave Andrews, DAEC

Here are some broad brush head line figures for the owning and operating of a particular kind of advanced staged combustion power plant, obtained from a leading manufacturer, suitable for biomass, waste materials and waste wood. The process is essential combustion, but is referred to as gasification / combustion, meaning the material is first charred on a grate, with the off syngas being burnt in a separate adjacent and low level refractory chamber. The char is then burnt at a later stage as it moves down the great. This leads to greater burn up of fuel and lower emissions. The syngas combustion is maintained within the ceramic, and special gas flows prevent the contaminants in the gases fouling and degrading the ceramics.

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Hydrogen – the green currency of the future

All governments have pledged to improve energy efficiency and reduce carbon emissions; this effectively means that the world must move to:

Electricity from nuclear, renewable or decarbonised sources
Hydrogen from renewable or decarbonised sources
biomass derived methane gas or hydrocarbon liquids or
heat as a by-product, or from biomass, solar or geothermal sources.

Of these electricity and hydrogen are purely manufactured energy vectors competing as intermediaries between energy sources and final consumers. In recent years the tide seems to have moved to electricity as the ultimate solution, but this article will take issue with this. This is principally because of the severe cost implications associated with either electricity storage or its corollary – demand side management.

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CARBON CAPTURE AND STORAGE – TIME TO DELIVER

What is it: Carbon Capture and Storage (CCS), the process of capturing carbon emissions when fossil fuels are burnt on large scales such as during the power generation process, has been identified as having a key role in meeting the UK’s pressing climate change targets. CCS has the potential to reduce emissions by coal fired […]

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Active Power Article – Flywheel energy storage

Summary – this article offers compelling reasons for using a flywheel in combination with a diesel generator for UPS. Essentially batteries are the weakest point of any generator, and the flywheel eliminates the need for them, by storing enough energy to start the generator, and to provide no break power whilst the generator is starting. This article is written by and features Active Power who manufacture these systems.

As compared to other energy storage technologies (i.e., flow battery, compressed air, hydrogen, lithium ion battery, etc.), flywheel technology is a very mature, field proven technology. It’s worth noting Active Power was the first to commercialize a mechanical flywheel energy storage system and soon after patented the integration of UPS electronics with flywheel energy storage. Flywheel operation is very well understood and Active Power alone has more than 2,100 flywheels deployed in the field to date with more than 55 million hours of runtime. Flywheels present the most power dense energy storage technology when used as a bridging device between an outage and on to a generator.

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Why Do We Need The Supergrid, What Is Its Scope And What Will It Achieve?

Claverton House of Commons Presentation, 19th June 2009  Note – The Claverton Energy Groupcomprises about 300 independent energy experts who discuss energy issues. Not all members support the Supergrid concept, however a significant proportion, if not most, do. Dr Czisch presented at a recent Claverton Conference held at the Headquarters of Wessex Water in Bath […]

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