Question

• Determine the energy loss if glycerin at 25°C flows 30 m through a standard 146.3 mm diameter pipe with an average velocity
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Answer #1

Re = Reynold's number of flow = density*velocity*pipe diameter/dynamic viscosity = 1258*4*0.1463/0.96 = 766.86

f = Darcy friction factor = 64/Re (for laminar flow) = 64/766.86 = 0.0835

H = head loss in pipe = f*pipe length/pipe diameter*velocity^2/2/g = 0.0835*30/0.1463*4^2/2/9.8 = 13.977m

E = energy loss per second = H*density*g*pipe area*velocity = 13.977*1258*9.8*\pi*0.1463^2/4*4 = 11587.04 W = 11.58704 kW

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