Analysis of Cooling Air at the Inlet of Marine Engine with Exhaust Gas Recirculation by Ejector and Absorption Refrigeration

The ecological exhaust gas recirculation leads to deterioration in the engine fuel efficiency caused by a slowdown in the combustion process and a decrease in the operating cycle temperature. Energy losses are also associated with the recirculation and cleaning gases in scrubbers by removing their heat from seawater. Considering the analysis, the approach to increasing the energy and environmental efficiency of a ship’s diesel power plant due to cooling the cyclic air at the engine inlet by refrigeration machines that utilize the heat of exhaust and recirculating (ecological) gases is justified. This will compensate for energy losses caused by the recirculation of exhaust (ecological) gases and further reduce fuel consumption. The article shows the results of an analysis of the effect obtained from cooling the air at the inlet of an engine turbocharger by thermal refrigeration machines that utilize the heat of the exhaust and environmental (recirculated) gases. It is shown that inlet air cooling in ejectors and absorption refrigeration machines can considerably reduce engine-specific fuel consumption.