In the present investigation, a simulation model of the thermal calculation of the steam generator's steam generator 350 MW, operating under a Rankine cycle with superheat and regeneration, was developed. An analysis was carried out, modifying some parameters of the combustion (air and fuel flow) and the temperatures reached by the products of the combustion at the exit of the steam generator's home were determined, using the method of successive substitutions, applied to the thermal calculation methodology, with a stopping criterion of the approximate relative error of ε_ra <1 x10-8. It was found that the temperatures reached by the combustion gases at the steam generator's outlet for the 100%, 75%, 50% and 25% regimes are: 1492.4 ° C, 1379.3 ° C, 1238.0 ° C and 980.0 ° C, respectively. Regarding the effect of air dosing on the thermal efficiency of the cycle, it is observed that it increases slightly with the increase of the dosage. Being the maximum thermal efficiency of the cycle of 35.8%

The use of solid biofuels in for industrial heat has gained interest in several countries of the world, due to the economic advantages offered by its use since it is considered a neutral renewable energy source of greenhouse gas emissions greenhouse. Even with the high availability of biomass in Mexico, with appropriate characteristics for incineration, its development has lagged behind other countries. It is important to carry out economic and environmental feasibility studies of the biomass systems already installed in order to identify opportunities for its optimization. This article presents 2 environmental and economic feasibility studies of the use of BCS for process heat; using agave bagasse and pine woodchip among other biofuels. An emission analysis, an ACV analysis as well as an economic feasibility analysis are carried out and the results are compared with the use of fossil fuels to determine their feasibility in the medium term