From 16 to 19 November, at the BioEnergy Decentral exhibition in Hanover, Tognum subsidiary MTU Onsite Energy GmbH Gas Power Systems was showcasing electric power generation sets and combined heat and power (CHP) modules with the new Series 4000 biogas engines for the first time. With an electrical output of up to 2MW, these units complete the biogas product portfolio at the top end of the range.

These more powerful engines mean that operators of larger biogas plants can achieve even greater cost efficiency because, among other benefits, service and maintenance costs can be reduced in comparison with plants based on smaller engines and because superior power density reduces space requirements. Market introduction of biogas power generation plants based on 8, 12, 16 and 20-cylinder engines covering an output range from around 770kW to 2,000kW will take place in stages from March 2011. In addition, plants based on CHP modules provide access to an extra 2.6MW of thermal energy. Plans are also underway to introduce other versions during the course of next year. These include sewage and landfill gas with other versions for special gases scheduled for later.