EB, Fluid Transport. Water is pumped from a reservoir to top of the mountain through a 1800m long 6-inch schedule 120 pipe at an average velocity of 5 m/s. The pipe discharges into a pressurized storage tank at a level 1500m above the level in the reservoir. The storage tank is maintained at a gauge pressure of 1520 mm Hg and has a total capacity of 2000 m^3. If the overall efficiency of pump is 70% and the cost of electricity to the motor is 5- cent/kW-h, (a) what is the total cost of pumping water to fill the storage tank? (b) Repeat part (a) if the storage tank pressure is lowered by 760 mm Hg (c) Repeat part (a) if the water is replaced with glycerol (SG = 1.26; µ = 1412 cP) and the pump efficiency is now 50%. (For turbulent flow regime, take f = 0.184Re^-0.2) expecting unit : (a) 10^2 $ (b) 10^2 $ (c) 10^3 $ SI constant Patm = 10^5 Pa; pwater - 1000 kg/m^3; pair - 1.2kg/m^3; μwater - 10^-3 N•s/m^2; uair - 2 x 10^-5 N•s/m^2 ; g = 9.8 m/s^2
EB, Fluid Transport. Water is pumped from a reservoir to top of the mountain through a 1800m long 6-inch schedule 120 pipe at an average velocity of 5 m/s. The pipe discharges into a pressurized storage tank at a level 1500m above the level in the reservoir. The storage tank is maintained at a gauge pressure of 1520 mm Hg and has a total capacity of 2000 m^3. If the overall efficiency of pump is 70% and the cost of electricity to the motor is 5- cent/kW-h, (a) what is the total cost of pumping water to fill the storage tank? (b) Repeat part (a) if the storage tank pressure is lowered by 760 mm Hg (c) Repeat part (a) if the water is replaced with glycerol (SG = 1.26; µ = 1412 cP) and the pump efficiency is now 50%. (For turbulent flow regime, take f = 0.184Re^-0.2) expecting unit : (a) 10^2 $ (b) 10^2 $ (c) 10^3 $ SI constant Patm = 10^5 Pa; pwater - 1000 kg/m^3; pair - 1.2kg/m^3; μwater - 10^-3 N•s/m^2; uair - 2 x 10^-5 N•s/m^2 ; g = 9.8 m/s^2
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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