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Elco References E

Building project: SNOW DOME, Bispingen Energy-saving heating performance coolly calculated The starting point In the spring of 2006 the planning office of Wenzel requested tenders for all technical systems in the SNOW DOME. Con- struction of the indoor ski slope began in May 2006. The required boiler system was to have a power of about 630 kWh overall. The tender was for a cascaded double boiler: one heating boiler for the base load, and a second one for peak loads. The new system ELCO succeeded in winning over the responsible heating com- pany with their competence in the area of condensing boilers. The types that were selected were the RENDAMAX 2906 with 387 kW and RENDAMAX 507 with 247 kW. The ELCO gas condensing boilers are characterised by very compact dimen- sions, low weight and the fact that they can be completely stripped down. The extremely low noise and pollutant emissions – mean noise pressure level at 1 m distance from boiler < 52 db(A), NOx < 35 mg per kWh – make these boilers the most environ- mentally friendly of their kind. These values are achieved by the series installation of air-intake and exhaust-gas resonance mufflers combined with elastomer sound-insulation feet, and by the water-cooled pre-mix burner system. Because of the wide range of modulation (control range of up to 1:5) and the very high standard efficiency factor of up to 110.8 %, these boilers enable ELCO to achieve a reduction in fuel costs of around 15 % compared with conventional heat- ing systems. Thanks to the small dimensions and the wide, infinitely adjustable range of modulation, the boilers cause extremely slight stand-time losses. Equipment Boilers Rated power Total power Standard efficiency factor New system 1 gas condensing boiler R 2906 and 1 condensing boiler R 507 1 x 387 kW and 1 x 247 kW 634 kW up to 110.8 %