Avaliação de Funcionalidade e Análise De Eficiência De Chillers De Shoppings: Estudo De Caso - Mangabeira Shopping

Abstract

This final paper deals about the analysis of the functionalities and efficiency of the chillers that compose the air conditioning system of Mangabeira Shopping, located in João Pessoa, in Mangabeira neighborhood. The use of air conditioning in closed environments is expected and demanded in several establishments such as banks, supermarkets, schools, universities and, mainly, shopping malls. They are places that are visited by a large number of people daily. The machines designated to climatize large environments are called chillers. These devices exist in several models and have the function of transforming mechanical energy into thermal energy. First, a comparison of the chillers performance project values with the values acquired over an 18-month period will be made. The second stage consists of the study of the methods of electric consumption savings elaborated by the engineers of the mall. Some examples of these methods are; use a certain number of chillers during the cold production process, place them in a capacity less than 100% and charge the tank less than its maximum capacity. With the value of the cooling capacity that was estimated using data collected in the field, it is possible to determine its coefficient of performance (COP), which is the most common way to specify the energy efficiency of a Chiller. Through the results of this work, it is possible to obtain conclusions about the strategies implemented and to determine the most advantageous capacity for the operation of the mall and also what tank load, complete or partial, is more favorable. Finally, it also allows us to know if the numbers activated chillers influence the efficiency of the system.