In order to study the incomes of an combined heat and power plant, which uses biomass as fuel, to supply the Orléans heat network with superheated water, and the electricity grid, we have created a simulator to establish the best thermal cycle appropriate to the needs of ENGIE COFELY, according to the investment compared to the duration of operation. The simulator made it possible to work around the steam turbine and to come to the conclusion of having to divide it into two parts, a back pressure turbine on one side of the generator, and a condensate turbine on the other side. This decision led to an overinvestment at the time of the turbine purchase, but did not release fatal heat to the outside air during the calculation period of the ene...