978-3-937654-71-3

Product no.: 978-3-937654-71-3

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Description

Since 2010 the public sewage disposal organiza-tion »Zweckverband Frohnbach« is testing a high-performance Stirling-engined combined heat and power unit (CHP) in operation with problematic digester gas produced at wastewater treatment plant in Niederfrohna (Saxony). Because the principle of external burning it should be an alternative to Otto-engined CHP. Otto motors require expensive removal of siloxanes from the gas and a lot of maintenance. Whereas Stirling engines don’t have ignition plugs and valves. In addition to this the tested motor is working without lubrication system. It was constructed for more than 100.000 operation hours. One service inspection a year is enough.
In full speed operation the stirling CHP is producing a maximal electrical power of about 38 kW and a thermal power of around 120 kW. The thermal efficiency of about 70 percent is nearly steady all over the range of operation. There are electrical efficiencies of nearly 30 percent and total efficiencies of more than 90 percent reachable. Maximum feed of digestion gas is 27 m3N/h.
Till now the stirling CHP was running without any problems. The burning process with preheating of air is good controllable by lambda oxygen sensor and very low emissions are given away by exhaust gas. It would provide such a stirling CHP as an obvious solution to make electricity also from more difficult gaseous fuels with fluctuating compounds and very low concentrations of burning parts, for example flare gas and gas from landfills getting older and having increasing off-peak periods.
 

Additional product information

Seitenzahl
58
Breite
234
Höhe
305
Tiefe
12
Druckart
colored
bond type
hardback