The air cooling at the inlet of gas turbine unites (GTU) in operation conditions of Kazakhstan and Ukraine was analyzed. To increase the efficiency of cooling air in actual climatic conditions a two-stage deep air cooling in waste heat recovery chillers of combined type that convert the heat of exhaust gas of GTU has been proposed as a novel approach in GTU inlet air cooling. The calculations were conducted for cooling ambient air to 15 °C by absorption lithium-bromide chiller (ACh) and down to 10 °C by absorption-ejector chiller (AECh). It was shown that air cooling in AECh provides approximately 1.5 times greater annual reduction in fuel consumption compared to cooling air in ACh.
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