Comparison of active and passive controls to prove the degradation time

Flow control is an important topic because of its contribution in energy saving in piping system. The choice of control technique of flow is no less important to be applied in the right case. One of the impacts of this application is the efficiency of degradation time which can occur at any time. Therefore, the purpose of this study is to reveal the degradation time of two types of flow control. The research applied a piping system with a horizontal position. For the working fluid, it uses a mixture of nata de coco fibers for active control and spiral pipes for passive control with the slurries as the working fluid. Both pipes used were the three lobes spiral pipe and the pentagon spiral pipe with the average size P/Di 7. The results revealed that the active control had a variation of the drag reduction value with the increasing time indicating that degradation occurred while the passive control had a constant value. The results of this study are very important to determine the type of flow control that will be used according to the case handled and the results to be obtained.