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This publication presents the work done on energy optimization of a group of chillers by automating the cooling system of blowing dies in an industry that is entrusted with the manufacture of plastic containers. In a first stage, the preliminary study on the energy analysis of the old system, where each chiller was in charge of cooling a specific group of blow moulding machines, without taking into account whether or not the blow moulding machines are working, is detailed; subsequent to this, the implementation of the automated cooling system was carried out, where all chillers were centralized in a machine room, automation was carried out with a Siemens S7-1200 PLC, switching the chillers on and off is based on the total thermal capacity required by the blow moulding machines. Finally, the energy analysis of the new cooling system was carried out, where the results were compared, and conclusions were drawn.

The demand for energy is increasing, especially in developing countries. Renewable energies such as hydroelectric power, has become one of the most demanded energy sources for its generation, that is why it was studied and analyzed, through the computational dynamics of fluids "CFD" in the software ANSYS, the flow of a micro vortex gravitational hydroelectric power station for the generation of electric power. This study analyzes a structure that, by its design, has the capacity to form a gravitational vortex current from a water flow with a small difference in height. To verify results, a prototype of the system is built, which will generate energy from the formation of the gravitational vortex. 

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