An anaerobic digester (sealed, ID: 20 m) is used to produce renewable fuel from agricultural biomass. The head space pressure is maintained at 18.6 psi. A commercial steel pipe (20 cm) isconnected to the bottom of the digester to remove the biofuel (y= 2000 N/m³, vapor pressure 0.2 psi) generated at 0.034 m³/s. A centrifugal pump (Taco® Model 4007, 7.00 in, operated at1760 rpm) will be used. Assuming the head loss in the pipe is 225 ft, which of the following elevation can the pump be located?HEAD IN FEET756045OO15Taco®L/SEC 507.50"(191mm)6.00" (152mm).TI 30 5.50"(140mm)07.00"(178mm)6.50"(165mm)10O Both of theseCURVES BASED ON CLEAR WATERWITH SPECIFIC GRAVITY OF 1.0O Neither of these15125Model 4007FI & CI Series2025O 30 ft below the liquid surface in the digesterO 15 ft below the liquid surface in the digester302081760 RPMNovember 1, 20104045(2.2KW)3HP35REQUIRED NPSH-82%180%LL75%.5HP(3 7KW)250375 500625FLOW IN GALLONS PER MINUTECurve no. 2071Min. Imp. Dia. 5.50"Size 5 X 4 X 7.050556075065%(5.6KW)(7 5KW)10HP75HP875FEET201612-8-40151000NPSHHEAD IN METERS0-6048-36-2412-0150100HEAD IN KILOPASCALS

Discharge Headspace = 18.6 psiSpeed N= 1760 rpmHead loss in the pipe Vapor pressure = 0.2 psi

An anaerobic digester (sealed, ID: 20 m) is used to produce renewable fuel from agricultural biomass. The head space pressure is maintained at 18.6 psi. A commercial steel pipe (20 cm) is connected to the bottom of the digester to remove the biofuel (y=2000 N/m³, vapor pressure 0.2 psi) generated at 0.034 m³/s. A centrifugal pump (Taco® Model 4007, 7.00 in, operated at 1760 rpm) will be used. Assuming the head loss in the pipe is 225 ft, which of the following elevation can the pump be located? HEAD IN FEET 75 60 45 Laco L/SEC 5 15 10 7.50"(191mm) 7.00"(178mm) 6.50"(165mm) 6.00 (152mm) 30 5.50"(140mm) 15 Model 4007 FI & CI Series 20 25 % % CURVES BASED ON CLEAR WATER WITH SPECIFIC GRAVITY OF 10 30 REQUIRED NPSH X 1760 RPM November 1, 2010 35 40 45 3HP (2.2KW) 83.5% Curve no. 2071 Min. Imp. Dia. 5.50" Size 5 X 4 X 7.0 50 55 60 82% 80% 77% 75% 5HP 75HP (5.6KW) (7 5KW) 10HP FEET 20 16 12 8 4 -0 15 5 NPSH L 60 HEAD IN METERS 64522 36 12 0 150 100 HEAD IN KILOPASCALS

An anaerobic digester (sealed, ID: 20 m) is used to produce renewable fuel from agricultural biomass. The head space pressure is maintained at 18.6 psi. A commercial steel pipe (20 cm) is connected to the bottom of the digester to remove the biofuel (y=2000 N/m³, vapor pressure 0.2 psi) generated at 0.034 m³/s. A centrifugal pump (Taco® Model 4007, 7.00 in, operated at 1760 rpm) will be used. Assuming the head loss in the pipe is 225 ft, which of the following elevation can the pump be located? HEAD IN FEET 75 60 45 Laco L/SEC 5 15 10 7.50"(191mm) 7.00"(178mm) 6.50"(165mm) 6.00 (152mm) 30 5.50"(140mm) 15 Model 4007 FI & CI Series 20 25 % % CURVES BASED ON CLEAR WATER WITH SPECIFIC GRAVITY OF 10 30 REQUIRED NPSH X 1760 RPM November 1, 2010 35 40 45 3HP (2.2KW) 83.5% Curve no. 2071 Min. Imp. Dia. 5.50" Size 5 X 4 X 7.0 50 55 60 82% 80% 77% 75% 5HP 75HP (5.6KW) (7 5KW) 10HP FEET 20 16 12 8 4 -0 15 5 NPSH L 60 HEAD IN METERS 64522 36 12 0 150 100 HEAD IN KILOPASCALS

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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P (6-5) Two centrifugal pumps are connected in parallel in a given pumping system. Plot total head Ah against capacity Q pump and system curves for both pumps running on the basis of the following data: Operating data for pump 1 Operating data for pump 2 Ahm, 40.0 35.0 30.0 25.0 Ah m. 0.0 35 30 25 Qim³/h. 169 209 239 265 Q₂m/h 0 136 203 267 data for system Ah m, 20.0 25.0 30.0 35.0 Q.m³/h, 0 244 372 470
QUESTION 2 A centrifugal pump has the following characteristics: V (m³/h) H (m) n (%) 23 46 69 92 115 10.5 13.5 61 17 16 6.6 53 49.5 63.5 10 The pump is used to pump water at 25°C from a low reservoir to a high reservoir through a cast iron piping which is 800 m in total length, 15 cm diameter. The difference between the water levels in the reservoirs is 8 m. Neglecting all losses except friction find the power input to the pump. Use the information given to assume the friction factor and confirm that it is indeed correct.
Example 1: A system has a volume flow rate requirement of 1lit/s with an index run AP of 30kPa. Find an appropriate pump from the A manufacturer's catalogue gives the following information for a centrifugal pump operating at 12rev/s: P| 49.38 47.5| 44.38 40 34.38 27.5 19.38 Q|0.25 0.5 0.75 1.25 1.5 1.75 yelume flow rate
1(C) A centrifugal pump has an impeller of diameter (D) of 300mm. When pumping 20°C water at a fixed rotational speed of 1500 RPM, the measured flow rate Q and pressure rise Pare given by the manufacturer as follows: Flow Rate (L/s) 13 19 25 32 38 44 Pressure Rise (Bar) 2.5 2.4 2.35 2.2 2.0 1.6 It is desired to use the same pump, running at 945 RPM, to pump 20°C water at 22L/s. According to your dimensionless correlation, what pressure rise p is expected?
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For the following pump-pipe system below, how will the discharge and pump head change if a smaller pump in the same family is used to replace the current pump? Increase or decrease? EB EA Head (ft) 350 300 250 225 200 150 100 50 0 0 5 10 O Pump head will decrease; discharge will decrease. O Pump head will increase; discharge will increase. O Pump head will increase; discharge will increase. O Pump head will decrease; discharge will increase. 15 20 Discharge (cfs) System head curve 25 H₂ -Intersection point Pump characteristics 30 35 40
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In the diesel engine experiment, if: engine speed= 1302 Torque (N.m) = 9.9 Power(W)= 1344 Air mass flow rate (Kg/sec) = 0.002178 fuel mass flow rate (Kg/sec) = 0.000140 Tamb (C)= 20.1 Texh (C)= 292 Pamb (mbar)= 929 Air box Pressure (Pa)= -82 The Volumetric efficiency will be: Select one: a. 84.89% O b. 78.33% O c. 65.27% O d. 71.86%