Análise de tanques atmosféricos horizontais aéreos para armazenamento de gasolina comum em postos de abastecimento na região metropolitana de Recife

Abstract

This work is the result of a study of experimental analyzes that measured the evaporation rate of common type C gasoline as a function of temperature and relative humidity in gas stations for air horizontal atmospheric storage tanks in the Metropolitan Region of Recife. In order to verify the influences of the relative humidity of the air, the temperature of the environment in which the gas station is located and the wall temperature of the horizontal atmospheric tank with the highest solar incidence on the evaporation rate, a digital thermo-hygrometer was used. The experiment also had the aid of an analog thermometer and an electronic volume measurement system to collect the fuel temperature and identify the amount of common gasoline in real time, respectively. The results showed that the increase in fuel and tank wall temperatures with greater solar incidence, the entry of regular gasoline into the supply tank and the percentages of relative humidity close to 50% can affect the evaporation rate of regular gasoline. at rates higher than 5% of fuel consumption, that is, approximately nine times the variation in stock provided for in Brazilian legislation. In view of this, a cost analysis of potential fuel losses was also carried out and a methodology to reduce errors in fuel control was carried out, because when there are volume differences between physical inventory and book inventory in overhead horizontal atmospheric storage tanks with gasoline, generate uncertainties, mistrust, unavailability of the fleet, discomfort to controllers, and, therefore, losses to the financial sector.