In integrated electrical, heat and cold supply installations, gas reciprocating engines (GE) are widely used. The heat removed from the GE in the form of hot water with a temperature of about 90 °C is transformed into cold by an absorption lithium-bromide-chiller (ACh) with a decrease in water temperature by no more than 10…15 °C. At the same time, in order to maintain the thermal state of the GE at a safe level, the temperature of chilled water at the inlet of the engine should not be higher than 70 °C. Excessive heat is discharged into the atmosphere by the emergency discharge radiator. These losses are about 25%. A system for their utilization in refrigeration ejector chiller is proposed. With this the received addition cold can be used for supplementary cooling of the GE scavenge gas-air mixture, which is usually cooled by a radiator. But at high ambient temperatures the cooling potential of radiator can be insufficient that leads to falling the fuel efficiency of GE. It is shown that at elevated ambient temperatures additional cooling of the scavenge gas- air mixture allows to reduce specific fuel consumption and increase power output of the GE.
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