CPC F04B 39/066 (2013.01) [F04B 39/06 (2013.01); F04B 41/06 (2013.01); F04B 53/08 (2013.01); F04C 18/16 (2013.01); F04C 23/001 (2013.01); F04C 29/04 (2013.01); F04C 2210/221 (2013.01)] | 10 Claims |
1. An at least two-stage compressed air generator, comprising
a liquid-cooled intercooler disposed between a first compressor stage and a second compressor stage for cooling precompressed air discharged from the first compressor stage before the precompressed air enters the second compressor stage;
a liquid-cooled aftercooler disposed after the second compressor stage for cooling air compressed by the second compressor stage;
a liquid-cooled subassembly cooler for absorbing heat from the compressed air generator;
a coolant circuit including a main cooler having a cold side and a hot side, the cold side configured to feed a cooled coolant having a low temperature respectively to a coolant inlet of the liquid-cooled intercooler, to a coolant inlet of the liquid-cooled aftercooler, and to a coolant inlet of the subassembly cooler in parallel, and the hot side configured to receive heated coolant having a high temperature which exits in parallel respectively at a coolant outlet of the liquid-cooled intercooler and at a coolant outlet of the liquid-cooled aftercooler,
wherein a coolant outlet of the subassembly cooler is connected to at least one of a feed inlet of the liquid-cooled intercooler and a feed inlet of the liquid-cooled aftercooler, wherein the feed inlet of the liquid-cooled intercooler is disposed between the coolant inlet of the liquid-cooled intercooler and the coolant outlet of the liquid-cooled intercooler at a point at which an intermediate temperature of the coolant in the liquid-cooled intercooler is within twenty percent (±20%) of an exit temperature of the coolant at the subassembly cooler, and wherein the feed inlet of the liquid-cooled aftercooler is disposed between the coolant inlet of the liquid-cooled aftercooler and the coolant outlet of the liquid-cooled aftercooler at a point at which an intermediate temperature of the coolant in the liquid-cooled aftercooler is within twenty percent (±20%) of the exit temperature of the coolant at the subassembly cooler.
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