In the EGR system, after a cooling and cleaning process, part of the exhaust gas is recirculated to the scavenge air receiver. In this way, part of the oxygen in the scavenge air is replaced by CO2 from the combustion process.
This replacement decreases the O2 content and increases the heat capacity of the scavenge air, thus reducing the temperature peak of the combustion and the formation of NOx. The NOx reduction is almost linear to the ratio of recirculated exhaust gas.
The EGR compressor is a single-stage turbo compressor with oil lubricated bearings, direct driven with an asynchronous motor and a Variable Frequency Drive (VFD). The design features the unique flow optimisation mechanism, utilising Inlet Guide Vanes (IGVs) to optimise efficiency for a given motor rating.
The core compressor features an impeller with backward leaning blades angled according to regulation and milled from a solid, forged piece of duplex stainless steel with an optimal weight/strength ratio.
Customer ships compressor A for repair, and Howden returns refurbished compressor B from stock, and place refurbished compressor A in stock.
No lead time for refurbished pre-set compressor.
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