Biogas CHP

Stirling engines coupled with a combustion chamber can be directly fuelled by low-calorific liquid or gaseous fuels, such as pyrolysis oil, landfill gas or gas from sewage treatement.

The external combustion system allows for the optimization of the combustion process. Efficiency is increased by utilizing preheated combustion air. The NOx and CO emissions are kept at a very low level.

Advantages over internal combustion engines:

• low emission levels - an external combustion system minimizes emissions
• less pretreatement - an external combustion system is specially designed for low-grade fuels, and does therefore not require removal of Siloxanes, moisture or compression

Specifications:

• Engine Type: SD4
• Fuel: Sewage gas
• Methane content (%): 60-70
• Energy Input (kW): 200
• Electrical Output (kW): 35
• Heating Output (kW): 140-145
• Electrical efficiency, net (%): 17.5
• Plant efficiency (%): 88-90