Elco References E

The starting point The old heating no longer met the requirements A standard boiler with a jet burner and return riser and a power of 1 Gcal served to cover the base load. A second boiler of the same type covered the peak loads. Heating and warm water processing were distributed over 3 equipment rooms. Hotel Lindner had rigorous requirements on warm water and heating comfort The energy costs made up too large a portion of the over- all operating costs of the hotel. The convenience of the heating and warm water did not meet the requirements. Hotel Lindner therefore decided on a new, modern heating solution. The greatest challenge was that the renovation was to be carried out parallel to the daily running of the hotel. • Hotel with 230 rooms, 10,500 m² heated area • Energy consumption: 3,900 MWh The new system Cascaded gas condensing boilers Two RENDAMAX 3603 gas condensing boilers are arranged in a cascade. This gives a total power of 1,692 kW, which is adjusted by modulation. The condensing boilers are of split HT/LT construction. This makes it possible for some 75 % of the annual heating operation to be kept within the condensing range. The heating solution achieves a standard efficiency factor of 106/109.8 %. The new heating system further reduces the temperature of the waste gases to below 80 degrees. Stand-by losses are reduced by the gradually raised boiler temperature. The central heating and the warm-water processing are located in 2 equipment rooms. The harmonised, modular construction simplifies installation. It was possible to maintain the daily running of the hotel. Renovation: Lindner Congress Hotel, Düsseldorf From standard boilers to modern gas condensing solution Old system Standard boilers with jet burners 2 Gcal/2,400 kW < 80 % 4 warm-water buffers of 2,000 litres each with external heat exchanger 3,900 MWh per year Equipment Boilers Rated power Total power Buffers Total energy consumption New system 2 R 3603 gas condensing boilers, cascaded 2 x 846 kW 1,692 kW 106 %/109.8 % 4 high-performance buffers of 1,000 litres each with external heat exchanger 3,200 MWh per year Equipment Boilers Rated power Total power Standard efficiency factor Buffers Total energy consumption