Premium marathon ® combustion systems in worldwide operation… Installation example in Austria Fire and flame for exemplary emissions In November, the new Werndorf cogeneration plant went into operation in Austria. The power plant with natural gas firing will supply parts of the city of Graz with district heating. The plant in the newly built boiler house consists of 3 Viessmann Vitomax double flame tube boilers with a heat output of 32,5 MW each. dreizler ® supplied 6 x powerful gas burners marathon ® M 10003.5 ARZ in DUObloc version. The blower units were mounted above the boilers and supply the required combustion air to the marathon ® burners. The burners are equipped with internal exhaust gas recirculation ARZ and exhaust gas recirculation ARF. The precise matching of the combustion chamber geometry of the three-pass boiler and the brilliant LOW-NO x characteristics of the applied marathon ® burners ensure CO 2 -efficient and efficiency-optimized heat generation. In combination with the downstream exhaust gas heat exchangers and an O 2 - optimized combustion, a combustion efficiency of more than 96,5% is achieved. It is possible to operate all three boilers simultaneously with the same district heating capacity, or just one boiler with full power and the other boilers in the partial load range. Depending on the respective load requirement and operating mode, each boiler in modulating burner operation can generate at least 2,5 MW up to max. 31,5 MW heat. The special strength of the system lies also in the innovative control technology, realized by our experienced partner for high-quality control systems, company ESF with Mr. Friesenbichler and his team. The combination of a type-tested Lamtec combustion manager with a freely programmable controller with 2v3 selection realizes all technical parameters for optimal energy and emission-optimized operation. The use of state-of-the-art marathon ® combustion technology reliably complies with the prescribed emission limits and optimally fulfills BAT (best available technology) requirements. The plant was taken over in the commercial operation in time on 12 th November 2018. Peter Huber, Managing Director of Viessmann Austria, praises the excellent cooperation and good coordination of all involved on the construction site: marathon ® burner courier We are proud of the new boiler house and the technical equipment components used in it. The dreizler ® team would like to thank all partners for the trust and the fast, successful implementation of this demanding LOW-NO x firing plant.