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Öğe Impact of excess roughness on power consumption in pipe flows(Batman Üniversitesi, 2017) Düz, HasanIn this study, the effect of excess surface roughness on pump power consumption was investigated for water pipe flows. In fluid distribution systems, the impurities adhering to flow wall or the wall corrosion cause the flow surface being more roughly and as a consequent cause to more frictional drag. Here, an experimental study was carried out with water flows inside aluminium, copper, steel and galvanized pipes which are detached directly from the aging fluid distribution assemblings. Roughness heights of these dated pipes was measured by experimental way. The measured roughness heights were compared with new manufacture values, the dated pipes was found more roughly. An energy consumption analysis was carried out for one meter of pipe flow for the Reynolds number between 15000 < Re < 150000. Determinations showed that the friction existed due to excess surface roughness caused the pump power consumption to increase and cost also, especially at high Reynolds number about Re > 105
