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ETW Energietechnik’s new gas blending technology for CHPs

ETW Energietechnik GmbH has developed new equipment that blends two gas streams of different qualities to fuel CHPs.


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This equipment precisely blends the two gases to a homogeneous fuel mixture and is indicated for landfills that struggle with shrinking heating values and volumes of biogas along their lifetime; this shrinking heating value can be compensated by gradually enriching biogas with natural gas (NG), the company says. “The blending is completely automatised and designed to consume the lowest possible amounts of NG and almost any CHP can easily be upgraded.” There are several advantages for the operator, according to the company: At startups the CHP receives the perfectly balanced fuel, preventing startup problems caused by low CH4 concentration; That enables the operation of CHPs even with CH4 concentration lower than 30 percent, increasing its lifetime and availability, thus its economic feasibility; The CHP can be operated independently from the land-fill gas supply. ETW Energietechnik has been developing and producing energy plants in Moers, Germany, since 1997.