A Pump Takes Water At 70 F From A Large Reservoir And Delivers It To The Bottom Of An Elevated Pressurized Tank P 15 P 1 (59.26 KiB) Viewed 35 times
A Pump Takes Water At 70 F From A Large Reservoir And Delivers It To The Bottom Of An Elevated Pressurized Tank P 15 P 2 (44.67 KiB) Viewed 35 times
A pump takes water at 70°F from a large reservoir and delivers it to the bottom of an elevated pressurized tank (P= 15 psig) through a 2.5-in Schedule 40 pipe. The inlet to the pump is located 6 ft above the water surface in the reservoir, and the water level in the tank is constant at 140 ft above the reservoir surface. The suction line consists of 80 ft of 2.5-in Schedule 40 pipe with two 90° elbows and one gate valve, while the discharge line is 230 ft long of 2.5- in Schedule 40 pipe with four 90° elbows and two gate valves. A venturi meter with a 1.5-in throat diameter connected to a mercury manometer is installed in the line to measure the flow rate. The reading in the manometer is 6 in.
(a) What is the flow rate in gal/min? (b) What is the velocity at the throat in m/s? (c) What is the differential pressure measured in the manometer in psig? (d) Calculate the velocity at the pipe in m/s and the mass flow rate in lb/s. (e) What is the NRe of the flow in the pipe? (f) Calculate the suction pressure and discharge pressure in psig. (g) What is the total dynamic head in ft? (h) Calculate the brake horsepower of the pump (hP) if efficiency is 65% (i) Calculate the NPSH available in ft
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