Perda de carga: um estudo de caso envolvendo o uso de hidrante de recalque e o uso do içamento de mangueiras

Abstract

Pressure drop is an issue directly associated with fluid movement in conduit and pipeline paths. In occurrences involving the performance of the Fire Department of the State of Maranhão in firefighting, the pressure effectively used by the garrison military to use in combat tactics will depend on the loss of cargo associated in the form of armature of hose lines as well as the piping topology of the existing hydrant system in the building itself. The knowledge of the various combat tactics and their implications regarding the greater or lesser loss of associated charge will guide a more effective combat with greater or lesser final pressure available. In this work, a case study on loss of head is made in the environment of the Tower of the Military Fire Academy “Josué Montello”. Two firefighting tactics are worked out in terms of the final pressure available to use. The first tactic consists of pressurizing the pump set of the Auto Bomba Tank vehicle for the installation's booster hydrant. The pressure available in each hydrant shelter present on the study tower floors is measured. The second combat tactic is to hoist hoses by ropes to each floor considered and check for available pressure. At the end of the study, a comparison is made to determine the best combat strategy based on the lowest rate of head loss. Finally, a theoretical approach of the two tactics is considered for purposes of comparing the values collected in the practical experiment and those verified in the calculations