# Machines

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## ThermoSysPro Version 4.2

Machines  


The multifluids machines modeled are CHP (Combined Heat and Power) as well as internal combustion engines.  
The internal combustion engine (or alternating engine) is a classical motor, using fuel to produce mechanical energy.   
The CHP engine functions similarly but is more efficient, as the heat produced by the fuel combustion is reused.  

For a better understanding of the underlying physics, see Chap. 15 of {cite:p}`el19`.