Calculate the specific energy consumption of a pump operating at 8200 m3 /d, 10 m of head, and 85 percent efficiency.
Calculate the specific energy consumption of a pump operating at 8200 m3 /d, 10 m of...
A centrifugal pump operating at its best efficiency transports a flow of 7.8 m3 / s over a height of 35 m. Determine: a) the specific speed (Ns) of the pump according to the discharge b) the specific speed (Ns) according to its power if the maximum efficiency of the pump is 75%. The diameter of the impeller is 30 inches and its angular speed is 2500 rev/min.
7.14 The pump in Fig. 7.20 delivers water from the lower to the upper reservoir at the rate of 0.057 m3/s. The energy loss between the suction pipe inlet and the pump is 1.83 m and that between the pump outlet and the upper reservoir is 3.66 m. Both pipes are 6-in Schedule 40 steel pipe. Calculate (a) the pressure at the pump inlet, (b) the pressure at the pump outlet, (c) the total head on the pump, and (d)...
It is proposed to pump 1500 m3 of a liquid (density 1100 kg m-3) each day through a total head of 10 m (including all losses) by using either a centrifugal pump or a reciprocating pump. The centrifugal pump discharges 2.0 m3 min-1 when driven by an electric motor supplying a power of 5 kW. The reciprocating pump has a discharge rate of 1.75 m3 min-1 when driven by an electric motor supplying 3.5 kw. (a) Calculate the efficiency of...
A water pump has been operating at a pump station at speed 1000 rpm. The pipeline system characteristics at the station are as follows. Head loss in pipeline: 80 1 Discharge (LS) 0 20 40 60 Head (m) 4 10 20 The static head is 20 m. The pump characteristics at speed 1000 rpm are provided by the manufacturer and given as follows. Discharge (IS) 0 20 40 50 60 Head (m) 50 45 14 Efficiency (%) 60 69 60...
3. The manufacturers rating for a centrifugal pump shows that the pump delivers 160 gpm at 80 ft of head when the pump speed is 3000 rpm. This rating is for the best operating point of the pump: the efficiency at this point is 59 percent. (be careful with units) (a) Calculate the specific speed of the pump. (b) What is the horsepower required to operate the pump at the manufacturers rating? (c) A 1.8 horsepower motor with a speed...
Mechanical Lab II. Please answer asap with clear work. Thank you! 1. A centrifugal pump performance data are shown in the following table for water. Pump speed-2500 RPM Pa or P2 (bar) P. or Pi (bar) Volume of water(L Time (sec) Input-Power (W) -0.3 20 60 100 For this data set, calculate the following i. Pump discharge capacity Q (LUs and GPM) ii. Pump head H (m and ft) iii. Fluid power Pr (Watt) iv. Brake power Pb (Watt) v....
Calculate the energy conversion efficiencies in percent of the energy conversion: A heat pump operating at 40oF produces 600,000 Btus of output heat for each 800 cubic feet of natural gas burned.
Pump Curve and System Curve W = 1500 RPM 120.00 110.00 100.00 90.00 80.00 E 70.00 Efficiency % 60.00 50.00 40.00 30.00 20.00 10.00 0.00 -System Curve ---Pump Head Efficiency 0 1 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0. 9 O m3/s The operating discharge is, A)0.2 m/s B) 0.7 ms C) 0.31 ms D) 0.6 m/s The operating pump head Hpois, A)55 m B) 106 m C) 61 m D) 110 m 6. If the rotational velocity...
Q4. A pump draws water from a large reservoir and delivers it to another reservoir whose water surface is 10 m higher than the pump centreline and that the pump is 1.5 meter above the suction reservoir. The total suction and deliver pipe used is 21.1 m in length, 9 cm in diameter and has a Darcy friction factor f0.0339. The pump operates at 750 rpm and its characteristic performances are given in table below: Q (m3 s H (m)15...
A motor which is used to rotate a pump consumes 20 kW energy. Its efficiency is 85%. a. What is the power delivered to the pump by the motor? b. The pump whose pipe diameter is 10 cm delivers the water at a mass flow rate 3 kg/s. What is the velocity of water? Assume density of water is 1000 kg/m3.