One of the areas of greatest interest in engineering is the conversion of heat into useful work because society consumes large amounts of energy.In this paper, a theoretical study of the simple Rankine cycle, regenerative and cogeneration is presented, to verify the set of operational parameters that allow maximizing the output power of a power generation facility.For the theoretical modeling, the Powercycle® software was used, which can predict the output conditions of a Rankine power cycle depending on the configuration, input values and pressure in the boiler.With the purpose to verify the results obtained with regeneration and cogeneration, a comparison was made of the results obtained with a simple Rankine cycle.It was determined that, with the increase of the temperature and the pressure at the entrance of the turbine, the efficiency of the cycles increases.Note that an increase in temperature means more heat entering the process, but the delta of work in this case is greater, while it was verified that the Powercycle® computational tool allows optimizing the performance of Rankine cycles under different operating configurations.