Home work 01 A hydraulic pump, with the performance characteristics of Fig. (1), operates at 2000 rpm in a system that requires Q = 20 gpm at p = 1500 psig to the load at one operating condition. Check the volume of oil per revolution delivered by this pump. Compute the required pump power input, the power delivered to the load, and the power dissipated by throttling at this condition. Compare with the power dissipated by using (i) a variable- displacement pump at 3000 psig and (ii) a pump with load sensing that operates at 100 psi above the load requirement. 4000 (280) Pump displacement: 5.9 in.rev (97 mL/rev -Overall efficiency ---Valumetric efficiency Speed: 1500 2000 2500 1pm 3000 L (210) 85 2000 (140) 1000 (70) 85 88 86 90- 180 F (80-C) 92- 83 Viscosity 9 cSt 97-- (U/min) (100) (140) (180) 1220) (260) 0 (0) 0 10 20 30 40 50 60 70 BO Volume flow rate, gom Figure (1) GIVEN: Hydraulic pump, with performance characteristics of Fig. (1), operating at 2000 rpm. FIND: System requires Q = 20 gpm at p = 1500 psig. (a) The volume of oil per revolution delivered by this pump. (b) The required pump power input. (c) The power delivered to the load. (d) The power dissipated by throttling at this condition. (e) The power dissipated using: (i) a variable-displacement pump at 3000 psig, and (ii) a pump with load sensing that operates at 100 psi above the load pressure requirement.

Figure below shows the performance curve family of Model 5009 Centrifugal pumps of Taco Pump Inc., running at a fixed speed of N = 1160 rpm. For the pump with the impeller diameter D = 8.625 in., calculate the power coefficient (Cp*) of the given pump at BEP if water is the fluid. HEAD IN FEET 0000 50 40 20 10 8.625" 30 (219mm). 0 O 0.821 O 0.731 O 0.467 aco 10 O 0.235 L/SEC 5 9.25" (235mm) 8.00" (203mm) 7.375" (187mm) 6.75" (171mm) 125 Model 5009 FI & CI Series 25 15 20 -do CURVES BASED ON CLEAR WATER WITH SPECIFIC GRAVITY OF 1.0 72% 75% 30 79% 1160 RPM FEBRUARY 19. 2002 40 3,5 45 REQUIRED NPSH 1.5HP (1.1KW) 79% 1⁰⁰ of 15² Curve no. 2140 Min. Imp. Dia. 6.75" Size 6 x 5 x 9.0 50 55 60 250 375 500 625 FLOW IN GALLONS PER MINUTE 72% 2HP(1.5KW) colo & 2⁰. It & SC- 09. 55% 5% 3HP (2.2KW) 7.5HP(5.6KW) 45% de 750 875 NGFEET 15 12 -9 -6 3 0 10 8 50 SHP(3.7KW) NPSH HEAD IN METERS 1000 r45 36 F27 18 -9 0 -100 --80 4 -40 -60 2 -20 -O HEAD IN KILOPASCALS

A centrifugal pump equipped with a variable frequency (speed) drive running at 3500 rpm is discharging 240GPM corresponding to a head of 287ft. The horsepower is 35.5. if the pump's speed is reduced to 2900 rpm, what will be the revised flow rate? Select the correct response: 176.21 gpm 76.21 gpm 89.66 gpm 98.85 gpm 289.66 gpm 198.86 gpm

A prototype pump is designed to so that the attached dimensionless performance curves apply. (a) If the pump is powered by a fixed speed motor delivering a rotational speed of 400 rpm and the impeller diameter is 2 m find the unknown quantities (Q, H, P,n ). Assume the pump is operating a peak efficiency and is pumping cold water. (b) If the pump is to be connected to standard steel pipe, which pipe should be used. Сн 1.00 Efficiency-n 0.75 CH 3 0.50 0.25 0.04 0.08 0.12 0.16 Ce C, and Efficiency

This course EHide block A centrifugal pump with the following impeller dimensions is used to pump water. The pump is running at 1000 rpm. The ideal head rise through the pump is 190 ft. b2 Poz 72 by The parameters of the impeller are as follows: r2= 9in, b2=3in, B2= 31° Take g= 9.81 m/s23 32.2 ft/s2 pw = 998 kg/m3 = 1.94 Slug/ft. Determine the theoretical flow rate in gpm Choose.. Determine the theoretical Power shaft in (hP) Choose...

Displacement (c): 0.2 in3/revShank diameter (d) = 0.625 in.Piston diameter (D) = 1.5 in.Rotation speed (n): 1725 RPMPressure (P): 600 PSIStroke (L) = 18in.   a) Calculate the theoretical flow rate of the pump in in3/min and US GPM.Theoretical flow (Q) = Theoretical displacement (C) x Speed of revolution (n)Theoretical flow (Q) = 0.2 in3/rev x 1725 rpmTheoretical flow (Q) = 345 in3/min = 1.49 US GPM b) Calculate the cylinder output speed in in/s.Cylinder output speed (VS) = Piston side flow (Q) / Piston area (Ap)Cylinder output speed (VS) = (Displacement x Speed of revolution) / Piston area (Ap)Cylinder output speed (VS) = (0.2 in3/rev x 1725 RPM) / 1.77 in2Cylinder output speed (VS) = (0.2 in3/rev x 1725 RPM) / 1.77 in2Cylinder output speed (VS) = 196.02in/s = 196.02 / 60s = 3.20 in/s Questions: c) Knowing the output velocity (ram speed), calculate the rod side flow in GPM when the ram is extending. d) Calculate the piston exit time in seconds. e) Calculate the piston entry time in…

Problem 5. Performance curves are available here at three different operating speeds, N = 1750, 2900, and 3500 rpm, for a family of stainless-steel pumps with closed impellers (SSPC1 250 Family) manufactured by American Stainless Pumps . (a) Make three tables (one for each N) at the best efficiency point, BEP, with the following columns: diameter, D (in), flowrate, Q (gpm), head, H₂ (ft), power, Wm (hp), efficiency, np, and specific speed in U.S. customary units, Ns,cu, and dimensionless, Ns. Use Web Plot Digitizer (the first 5 minutes of the tutorial video will show you how it works) to extract the data points for H₂ and at the BEP. (b) Use the scaling laws to produce the same table at N = 2900 rpm from the data at N = 3500 rpm. Briefly discuss the agreement between these two tables. (c) Plot N, versus D for all three values of N on the same figure. Briefly discuss the agreement of the curves.

A large centrifugal pump has a 254 mm diameter inlet and a 127 mm diameter outlet pipe. Themeasured flow rate is 51.6 Liter per second of cold water. The measured inlet pressure is 127 mmHg above atmospheric and discharge pressure measured at a point 1.22 m above the pump outletis 212 kPa absolute. The pump input is 10 Hp. Find the pump efficiency

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Find the specific speed of a double suction centrifugal pump delivering 1.5 m³/s against a net head of 15 m when running at 725 r.p.m. state the type of impeller to be employed for this pump.