Estudio de la eficiencia energética del sistema de generación de vapor de la planta de Quito de la empresa Cervecería Nacional.

Abstract

This thesis aims to carry out an energy study of the steam system of the Quito brewery of the Cervecería Nacional Company. This study is focused on identifying energy losses in the equipment and the modulation of steam generation to reduce fuel consumption. The energy study of the steam system was carried out using the PDCA methodology in two phases: a visual inspection of the entire system and a detailed study of it. The aim of visual inspection is to identify condensate, bunker and steam leaks in the system pipes, as well as conditions in the boilers that affect their correct operation. In the detailed study, the efficiency of the boilers was determined by the direct and indirect method, obtaining in all cases efficiencies greater than 80%, heat losses through uninsulated surfaces, economic losses due to steam leaks and losses due to steam traps in poor condition were determined at 1651, 718 and 40 267 USD/year respectively. With the steam generation modulation procedure according to the production scenarios, the steam consumption/generation efficiency increased by at least 2.3% per month. With the modification of the outlet hole of the deaerator, the use of steam was reduced by 1200 kg per day, maintaining the quality of the water fed to the boilers. Finally, as a part of the PDCA methodology to ensure the continuity of the implemented improvements, operating standards were created to standardize the new procedures resulting from this study.