Background to specification
The construction of the Biomass Slab by Balfour Beatty Ireland (BBI) was a construct only project for Bord na Mona and its end user Edenderry Power, Ireland’s first large scale independent power producer.
Working within a live power station, BBI was commissioned to excavate up to 2m of existing peat material and replace with imported granular material, followed by the installation of 12,500m² of concrete storage slab.
The works also included the installation of surface water drainage infrastructure including settlement tanks, silt traps, pumping chamber including associated mechanical and electrical works and oil interceptors.
To reduce greenhouse gas emissions and bring diversity to the fuel mix, Bord na Móna is committed to using 300,000 tonnes per annum of biomass by 2015 at Edenderry (30% co-firing), with up to 500,000 tonnes required there by 2020.
Biomass is organic plant-based material, the world’s fourth largest energy resource after oil, coal and gas. It is typically sourced from forestry and purpose grown energy crops. It will play a major role in reducing Ireland’s CO² emissions, with biomass for Edenderry coming from sawmill residues and pulpwood from forestry thinnings, energy crops and agri-residues.
Solution & benefits
Designing our attenuation system for the best solution, we produced a 455m³ volume tank made up of three parallel runs of 1400mm helibore steel pipe, elbowed at two points in a run of 100 meters to match the groundworks.
BBI has also used our attenuation systems for two phases of its airport development for Dublin Airport Authority, including a massive 15,800 m³ tank installed in 2008 – the largest Tubosider system ever commissioned from outside the UK.