Análisis de la eficiencia energética en un sistema de bombeo accionado de manera directa y controlado por un sistema de variación de frecuencia.

Abstract

The energy efficiency analysis was carried out in an educational module of a pumping system, which allowed us to monitor electrical parameters in two operating conditions, by direct starting and controlled by a frequency variation system so as to know the actual energy consumption in the two operating conditions. For this, the automation of an educational module of a pumping system was carried out using a programmable logic controller (PLC) Siemens S7-1200, a frequency value Siemens G110, a touch screen KTP700 and an energy analyzer SM1238 and This is programmed through a software called TIA Portal V15. The monitoring of the pumping system was performed in direct start in a period of 12 hours, obtaining a total energy consumption of 2,048 kWh which means a consumption at its constant speed of the engine with a frequency of 60 Hz. While in the second monitoring, by means of a system of variation of frequency in a similar period of 12 hours, it was possible to reduce the energy consumption to 0.9102kWh, for which it is important to mention that this value decreases by the frequency variation transmitted to the motor depending on the flow rate required by the user. Thus a financial analysis was carried out in the two cases presented, resulting in a higher energy consumption if the direct start to the pumping system is made and the cost is $ 6.10 per month, while through a system of variation of Frequently the cost to pay is reduced to $ 2.70 per month. So we came to the conclusion that by operating the system with variation of frequency achieved a saving of 55.56% of electricity consumption, so we can say that the project is very economically profitable. It is recommended to know and learn about the operation of the pumping system, when it is necessary to perform an analysis of electrical parameters.