Riello Help Drive Efficiency

Following a detailed technical appraisal and competitive tender exercise, Riello burners have been selected as the best match for refurbished boilers at the Driver & Vehicle Licencing Agency’s headquarters in Swansea.
The project followed a review of the existing boilers by Telereal Trillium on behalf of the DVLA, to assess their condition and future operational life. A comprehensive refurbishment of the three 18-year old, 2.5MW high temperature hot water boilers was identified as the best option, bringing them up to the standard of any new boiler on the market.
The refurbishment by Steam Plant Hire (Halesowen) included replacement of water tubes, insulation, refractory and casings and burners. Selecting correctly matched burners was therefore a key criterion of the specification.
Three burner manufacturers were invited to tender for the programme and Riello RLS300 EV O2 BLU low NOx dual-fuel burners were identified as offering the best match. In addition to delivering the required performance, the compact ‘monobloc’ design of the RLS300 EV O2 BLU enabled better use of available space in the plant room.
The burners were supplied with a Siemens LMV52 burner management system, which will work in conjunction with Riello’s electronic CAM technology to enhance combustion efficiency through accurate control of excess oxygen levels. Further efficiencies will be achieved using oxygen trim control and variable speed control of the main fan motor. The latter has been shown to reduce electrical consumption by up to 35% compared to fixed speed motors.
The RLS300 EV O2 BLU also incorporates Riello’s low NOx combustion head design, which guarantees excellent mixing of fuel and oxygen at all firing rates. In parallel, a system for internal recirculation of combustion gases back into the flame contributes to low NOx levels of <80mg/kWh, compliant with EN676 (Gas), Level 3.
The burner system also incorporates boiler ‘efficiency kits’ which allow boiler efficiency to be monitored in real time through the burner management system.

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