Análise de implantação de projeto de retrofit em sistema de água gelada visando economia de energia

Abstract

This work presents a study and analysis of the implementation of a retrofit project of the cold water system that composes the air conditioning system of an executive building in the city of Uberlândia. The analysis developed in the study, shows some alternatives proposed to improve the air conditioning system in order to get operational improvement and energy efficiency, specifically applied to the chiller that integrates the chilled water system. A financial analysis evaluation has done to define and decide the best option for the retrofit project and subsequent energy evaluation by means of energy and consumption measurement after project implementation. Then, the objective is to present the applied methodology for the implementation of retrofit project in cold water system focusing in the energy efficiency resulting in the improvement of the air conditioning system and saving in electricity expenses. Besides that, the studies pretends to analyze the investments applied. The project includes the implementation and retrofit applied to an air conditioning system using a water-condensing chiller. The existing equipment is in the end of its useful life, and showing a low performance index verified. It shows a measured power factor of 0.838 below that the allowed by legislation. Thus, after the development of the proposal project, the increase of the energy performance with the replacement of the new equipment indicated around 40% decrease result of the total consumption.