Title : Hydraulic Performance of a Centrifugal Pump and Hydrophobic Surface Effects
Increasing amounts of consumption led people make technological improvements about energy efficiency. One of these improvements which is called biomimicry, which imitates structures and systems at nature, can be applied in various areas where decrease of energy losses are desired. It is mostly believed that decreasing sand grain roughness on surfaces decreases friction losses that can be obtained from low surface energy. This case can be seen at leaves of Lotus (N. nucifera) which shows hydrophobic properties on its surfaces. In this study, efficiency of pump and its characteristics are examined with CFD methods and performance tests. Inner surfaces of volute and impeller itself are coated to gain features of hydrophobic surfaces. Characterization of hydrophobic surfaces in flow simulations are validated with comparison of test results. To investigate the influence of low energy surfaces on hydrophobic coating, closed-loop tests are conducted using relevant measurement techniques as per international standards. made with necessary equipment. Results show that performance curves of the pump has been improved and efficiency of the pump is increased by 8.3% at its best efficiency point.