Assignment 경제적인 파이프

Flow rate, Assume, turbulent flow. ∴ turbulent flow. [Step 2] Determine the maximum flow rate [Step 3] Determine the total friction loss, in the pipe & fittings Pump outlet : point 1, overhead tank inlet : point 2 로 놓고 Bernoulli Eq. linear velocity, (assuming ) Average velocity = Equivalent roughness, = 0.00015 ft (from textbook p 482) ∴ Friction factor = f = 0.0045 (from Fig. 14-1) Total Le for fittings & valves Le = Friction due to flow through pipe & all fittings ∴ [Step 4] EQ % valve sizing From Valve Performance Eq. ∴ [Step 5] Pump selection Total Head at normal flow rate, from the pump performance chart, Check : So the recommended pump : 68.5% efficiency, 28HP , 8` pump [Step 6] Resizing of Pipe ▶ A Glove vavle is used At given conditions : water at 61℉ normal flow rate : , Rule of thumbs : the adequate velocity of water or likewise water fluid in turbulent = 3～10 ft/sec Step 1 : Obtaining of optimum Diameter of the steel pipe If …
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