The CHP specialist company is achieving emissions levels of less than 50mg/Nm3 at 5% O2 that are sustained across the lifetime of the emissions system of its new cogeneration range.
This is almost half the most stringent emissions limit set by both BREEAM and the new Greater London Authority (GLA) Sustainable Design and Construction guidelines (95 mg/Nm3 at 5% O2) and five times lower than the more widely accepted limit of 250mg/Nm3 at 5% O2.
The emissions reduction has been achieved without the need for external NOx abatement technology and without increasing the size or footprint beyond those of existing CHP units. What it has done is redesign the internal catalyst area without increasing its footprint or reducing the overall efficiency of the CHP, while preserving space for servicing and maintenance. The configuring has been done using 3D CAD modelling technology aligned with BIM (building information modelling) processes to fit existing components into the smaller remaining space.
For CHP systems with an electrical output above 230 kWe, ENER-G can incorporate external NOx abatement technology, such as selective catalytic reduction (SCR). This, says ENER-G, can bring the NOx emissions level down as low as 10 mg/Nm3.
Ian Hopkins, director of ENER-G Cogen International, commented: "We believe that we’re the only company in the UK that can sustain such a low level throughout the lifetime of the catalyst and without the extra cost and bulk of using external NOx abatement equipment."
(Originally published in MPS February 2016)
