Water, at volume flow rate Q = 0.75 ft3/s, is delivered by a fire hose and nozzle assembly. The hose of L = 250 ft, D = 3 in., and e/D = 0.004 is made up of four 60-ft sections joined by couplings. The entrance is square-edged; the minor loss coefficient for each coupling is Kc = 0.5, based on mean velocity through the hose. The nozzle loss coefficient is Kn = 0.02, based on velocity in the exit jet, of D2 = 1 in. diameter. Estimate the supply pressure required at this flow rate.
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- The ethanol solution is pumped into a vessel 25 m above the reference point through a 25 mm diameter steel pipe at a rate of 8 m3/hour. The length of the pipe is 35m and there are 2 elbows. Calculate the pump power requirement. The properties of the solution are density 975 kg/m3 and viscosity 4x 10-4 Pa s. a. Reynolds number = b. Energy Loss along a straight pipe = J/kg. c. Energy Loss in turns = J/kg. d. Total energy to overcome friction = J/kg. e. Energy to raise water to height = J/kg. f. Theoretical energy requirement of the pump kg ethanol/second = J/kg. g. Actual pump power requirement = watt.arrow_forwardA Keystone Pipeline has a diameter of 36 inches and a design flow rate of 590,000 barrels per day of crude oil at 40ºC. Estimate the pump horsepower required if the length of the pipe is 2.9 mile(s). The pipe material is new steel. For crude oil at 40ºC, take μ ≈ 0.0053 kg/m-s ÷ 47.88 = 0.0000111 slug/ft-s. The density, with SG = 0.86, is 0.86(1.94) = 1.67 slug/ft3. Take f ≈ 0.0155.arrow_forwardA Keystone Pipeline has a diameter of 36 inches and a design flow rate of 590,000 barrels per day of crude oil at 40ºC. Estimate the pump horsepower required if the length of the pipe is 2.9 mile(s). The pipe material is new steel. For crude oil at 40ºC, take μ ≈ 0.0053 kg/m-s ÷ 47.88 = 0.0000111 slug/ft-s. The density, with SG = 0.86, is 0.86(1.94) = 1.67 slug/ft3. Take f ≈ 0.0155. Answer is in hp. Last answer was wrong! please help!arrow_forward
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- A local ventilation system (a hood and duct system) is used to remove air and contaminants from a pharmaceutical lab (Fig. 1). The inner diameter (ID) of the duct is 129 mm, its average roughness is 0.15 mm, and its total length is L = 24.5 m. There are three elbows along the duct, each with a minor loss coefficient of 0.21. Literature from the hood manufacturer lists the hood entry loss coefficient as 3.3 based on duct velocity. When the damper is fully open, its loss coefficient is 1.8. The minor loss coefficient through the 90° tee is 0.36. Finally, a one-way valve is installed to prevent contaminants from a second hood from flowing “backward” into the room. The minor loss coefficient of the (open) one-way valve is 6.6. The performance data of the fan fit a parabolic curve of the form Havailable = H0 - aV2, where shutoff head H0 = 60.0 mm of water column, coefficient a = 2.50 x 10-7 mm of water column per (Lpm)2 ,available head Havailable is in units of mm of water column, and…arrow_forwardThe head-discharge characteristic relationship of a pump is given by:H = 40 - 200*Q^2, where H is the total head generated by the pump in meters and Q is the discharge in m^3/s. The pump lifts water through a pipe 0.3 meter diameter over a distance of 1000 meters against a static lift of 25 meters. Find the operating/ duty point (H and Q) if the friction coefficient of the pipe 'f ' is 0.03.arrow_forwardTwo tanks A and B are connected by a pipe 30 m long. The first 21 m has a diameter of 75 mm and then is suddenly reduced to 50 mm for the next 9 m. The difference of levels between the tank water levels is 2.40 m. Pipe coefficient f=0.005 and the contraction coefficient at sudden change in area is 0.58. Find all the losses, in terms of velocity v2 at exit from the 50 mm2pipe and hence find rate of flow. Draw the Hydraulic gradient line.arrow_forward
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