AUTOMAÇÃO DE TORRES DE ARREFECIMENTO COM O USO DE SET POINT FLUTUANTE COM FOCO EM EFICIÊNCIA ENERGÉTICA.

• DOI: https://doi.org/10.22533/at.ed.6522405039

• Palavras-chave: Torres de Arrefecimento, Coeficiente de Performance, Eficiência Energética, Economia de Energia.

• Keywords: Cooling Towers, Coefficient of Performance, Energy Efficiency, Energy Saving.

• Abstract: This work focuses on presenting studies carried out in a specific industry that has an air conditioning system with water condensation, where there is a Condensation Water Plant that has a total of six cooling towers. The focus of this study is to present the improvement in the system's energy efficiency by applying a new automation concept that we call “Modulating Set Point for Cooling Towers”. The “traditional” system has only one option for the water outlet temperature from the cooling towers, however, on days when the weather conditions are favorable, it is possible to reduce the water outlet temperature from the towers, thus making that liquid coolers (chillers) have an increase in performance, cooling more and consuming less energy, thus increasing their Coefficient of Performance (COP). With this modulation in the Set Point temperature, on days with a lower wet bulb temperature in the external air it is possible to reduce the water outlet temperature from the towers (limit temperature for entry) by up to 8ºC (reducing from the current 28ºC to 20ºC). of condensation water in existing chillers). On average, the Chillers' Coefficient of Performance (COP) improves by 2% for every 1ºC decrease in the temperature of the water leaving the cooling towers, as we are proposing to reduce (when possible) the water temperature to 8ºC, at certain times the system will have a 16% increase in performance. According to the studies developed, the gain from implementing this automation will be electrical energy savings of approximately 682,300 kW per year.