Análise técnica e operacional da substituição de bombas de combustível de carreto por bombas centrífugas na Petromoc

Abstract

This paper addresses the replacement of gear pumps with centrifugal pumps at Petromoc, a leading Mozambican fuel distribution company. The study aims to assess the technical and economic feasibility of this replacement, aiming to solve recurring problems, such as accelerated wear of gear pumps, which generate frequent maintenance stops, in addition to compromising the accuracy and constant pressure in the filling process. The applied methodology includes a comparative analysis of performance and efficiency between gear pumps and centrifugal pumps, based on operational data, flow calculations, required power, head, energy consumption, and maintenance cost over a 10- year period. The results indicate that centrifugal pumps are more advantageous for high-demand operations and require less maintenance, resulting in greater durability and reduced operating costs. With an energy efficiency of 83.3%, centrifugal pumps provide long-term energy and cost savings, as the total projected cost over 10 years for the centrifugal pump system is USD 57,560 lower than that of gear pumps. In addition, centrifugal pumps demonstrate better performance in flow consistency, less wear, longer service life and greater operational stability, which are crucial for the uninterrupted operation of fueling operations. In relation to the specific objectives, the research was able to verify the superior performance of centrifugal pumps in terms of suction capacity, filling accuracy and reduction of mechanical wear, allowing for safer and more economical operation. Thus, the study concludes that replacing gear pumps with centrifugal pumps is a promising solution for Petromoc, meeting the needs for modernization and operational efficiency.