Cálculo da carga térmica na reestruturação de uma sala de desgaseificação de resina epóxi

Abstract

The infusion process of epoxy resin during the rotor blades manufacturing is preceded by resin deaeration process, to ensure that the polymer is used on production line with a minimum quantity of air in its liquid content. As the resin comes out of the deaerator, its temperature is at 41 °C, approximately, and should be send to the production line at 25 °C, furthermore, the room’s air temperature should be around 19 °C. Both values were obtained experimentally. For temperature control, the resin must be stored during 24 hours inside the deaeration room. In order to guarantee these thermal conditions, tests were made to verify the effectiveness when just one air conditioner is cooling the room. The tests results were unsatisfactory, and thus there was need to calculate the cooling load of the room, based on current standard ABNT NBR 16401 and Handbook ASHRAE , with an aim to select the optimum quantity of air conditioners. New tests were made with the purpose to verify the effectiveness of the new quantity of conditioners, reinforcing the significance of cooling load calculation for appropriate selection and dimensioning of necessary equipments to obtain the required temperature conditions. Furthermore, this study allows to identify areas for improvement, potential problems and solutions that involve epoxy resins storing and cooling, and, discuss about the impacts on rotor blades manufacturing, in case of temperature condition is non-compliance.