Chapt06

In the cross sections shown in fig c65 r 150 mm and a

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Unformatted text preview: pump-piping system to keep a 1-million-gallon capacity water tank filled. The plan is to use a modified (in size and speed) version of the model 1206 centrifugal pump manufactured by Taco Inc., Cranston, Rhode Island. Test data have been provided to us by Taco Inc. for a small model of this pump: D 5.45 in, 1760 r/min, tested with water at 20°C: Q, gal/min 0 H, ft Pump and motor Pump speed Valves Elbows Pipes 5 10 15 20 25 30 35 40 45 50 55 60 28 28 29 29 28 28 27 26 25 23 21 18 15 Efficiency, % 0 13 25 35 44 48 51 53 54 55 53 50 45 Electricity cost The tank is to be filled daily with rather chilly (10°C) groundwater from an aquifer, which is 0.8 mi from the tank and 150 ft lower than the tank. Estimated daily water use is 1.5 million gal/day. Filling time should not exceed 8 h per day. The piping system should have four “butterfly” valves with variable openings (see Fig. 6.19), 10 elbows of various angles, and galvanized-iron pipe of a size to be selected in the $3500 plus $1500 per inch of impeller size Between 900...
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