Combined heat & power: Combined heat and power (CHP) northern England

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Combined Heat & Power (CHP)

CHP is a revolutionary new technology promoting energy efficiency by generating energy from the gasification of untreated woodchip. CHP units harness the power produced by your boiler as it heats your property, ensuring you’re getting the most out of the fuel you put in.CHP boilers are currently backed by the Renewable Heat Incentive (RHI), Biogas Tariff and Renewable Obligation Certificates (ROCs), helping you to save on electricity costs and generate a new revenue stream.

A CHP boiler produces wood gas, through a multi-stage transformation process similar to combustion. However, unlike traditional combustion the process is interrupted, causing a release of carbon dioxide, water and combustible gas which is then turned into electricity and heat by a gas engine.

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How does it work?

The process of CHP is relatively simple, untreated woodchip is transported by the stoker auger into a reformer where the wood is gassified. The wood goes through a process of drying and pyrolysis - where the wood is heated to create and burn chemical products (such as tar, CO2, H2 and CH4) and oxidation - where chemical product is cracked, and then put through reduction, at which point the woodchip is transformed into low-tar wood gas. The wood-gas is cooled down in a water/heat exchanger and cleaned. The residual coal and ash is then transferred by augers from the gas filter through an ash lock and into a container. The gas is injected into the gas control line of the engine and the heat from engine, flue gas and wood gas is recovered and transferred to the heating network as demonstrated below...

Please use our contact form to get in touch. (click here).

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