variavel0=<b>Oscar Saul Hernandez Mendonza</b> - oscarhm@mecanica.ufu.br Universidade Federal de Uberlandia
<b>Gleyzer Martins</b> - gleyzerm@yahoo.com Universidade Federal de Uberlandia
<b>Jaime Vilela Rezende</b> - jvrezende@mecanica.ufu.br Universidade Federal de Uberlandia
<b>Abstract.</b> This work presents the simulation of a cooling air cycle moved by exhaust gases of Diesel engines. The air cycle operation is made of the following way: The turbine of the first turbocompressor is moved by the exhaust gases of the Diesel engine and the work realized by this turbine is used to move the first compressor. This compressor have as purpose to compresses the air after the withdrawal of compression heat in a heat exchanger. After this, the air is expanded in the second turbine. The second turbine is coupled in a second compressor that it compresses the environment air that is introduced in the first compressor after the withdrawal of the compression heat. The compact heat exchangers, used to cool the compressed air in the compressors, operates with water providing of the urban installation. The water in the second heat exchanger, posterior to the last compression stage, suffer a precooling using cooled air obtained from the air cycle. The program generates data from the mass and energy balances, air properties and efficiencies in the various cycle stages, allowing to analyze the variations in the parameters that determine the air state conditions in the cycle and the equipment behavior submitted to the different operational strategies. In this calculations were used cycle thermodynamic equations resolutions considering air as an ideal gas, efficiencies and pressure ratio given by the turbomachines operation curves supplied by the manufacturer. This cooling system constitutes a cogeneration compact system that does not affect the environment and air cooling temperatures next to 0ºC can be obtained in the cycle output.
<b>Keywords.</b> Turbocompressors, air cycle, precooling, cogeneration.