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The required NPSH of a pump is specified to be 8 ft. Determine the vertical distance above or below the pump axis from a vented surface of water at 25oC in a supply tank if suction side friction losses are equivalent to 3.8 ft.

The required NPSH of a pump is specified to be 8 ft. Determine the vertical distance above or below the pump axis from a vented surface of water at 25oC in a supply tank if suction side friction losses are equivalent to 3.8 ft.

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Instruction :Solve the problem neatly and systematically. Use free-floating decimals in all your calculations and in expressing your answers.  Box your final answers

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1. The required NPSH of a pump is specified to be 8 ft. Determine the vertical distance above or below the pump axis from a vented surface of water at 25oC in a supply tank if suction side friction losses are equivalent to 3.8 ft.

#use the pictures as reference as needed 

NET POSITIVE SUCTION HEAD (NPSH): the difference between the static head at the suction inlet and the head corresponding to the vapor pressure of the liquid at the pump inlet 9c (Par – P, NPSH = hf suction - Z. Pa' = abs. Pressure at the surface of the reservoir Pv = vapor pressure Za = height from the surface of the of the reservoir to the suction point in the where: pump
Transcribed Image Text:NET POSITIVE SUCTION HEAD (NPSH): the difference between the static head at the suction inlet and the head corresponding to the vapor pressure of the liquid at the pump inlet 9c (Par – P, NPSH = hf suction - Z. Pa' = abs. Pressure at the surface of the reservoir Pv = vapor pressure Za = height from the surface of the of the reservoir to the suction point in the where: pump
10-78 TRANSPORT AND STORAGE OF FLUIDS TABLE 10-22 Properties of Steel Pipe Circumference, ft, or surface, ft/ft of length Capacity at 1-ft/s velocity Cross-sectional area Nominal pipe size, in Outside diameter, Wall thickness, Weight of plain-end pipe, Ib/ft Inside diameter, Schedule Metal, in U.S. gal/ Flow, ft Outside Inside Ib/h water in no. in in min 0.307 .269 215 0.00051 .00040 .00025 0.106 .106 0.0804 .0705 0563 0.405 10S 40ST, 40S SOXS, 8OS 0.049 .068 .095 0.055 .072 0.231 .179 115.5 89.5 56.5 0.19 24 .093 .106 .113 .31 14 0.540 .097 .107 10S 40ST, 40S SOXS, 80S .065 .088 .119 .410 .364 .302 .00092 .00072 .00050 .141 .412 323 224 206.5 161.5 33 .42 .54 .125 .095 .079 .141 .157 .141 112.0 .177 .177 .177 363.5 298.0 220.0 0.675 10S .065 .125 .167 .217 .00162 .143 .129 .727 40ST, 40S SOXS, 8OS 545 .493 .00133 .00098 .42 .57 .74 .596 .091 .126 .423 .11 .440 0.840 .710 .674 .186 .176 1,234 617.0 58 10S 40ST, 40S 80XS, 8OS 160 XX .065 .083 .109 .158 .197 .250 .320 .385 .504 .00275 .00248 .00211 .00163 .00117 220 220 .220 220 .220 .220 1.112 0.945 0.730 0.527 0.155 556.0 472.0 365.0 263.5 77.5 .54 .67 .85 1.09 1.31 1.71 .622 .546 .147 .188 .294 .163 .143 .122 .066 464 252 .00035 1036.0 951.5 832.5 672.5 458.5 230,5 0.69 0.86 .065 .275 .275 275 .275 .275 .275 1.050 58 10S 40ST, 40S 80XS, 8OS .920 .884 .824 .742 .612 434 .201 .252 .333 .433 .572 .718 .00461 .00426 .00371 .00300 .00204 .00103 241 .231 .216 .194 .160 .114 2.072 1.903 .083 .113 .154 .219 1.665 1.345 0.917 0.461 1.13 1.47 1.94 2.44 160 XX .308 .00768 .00656 .00600 .00499 .00362 .00196 1.185 1.097 1.049 .255 .413 1725 1473 1345 1120 812.5 439.0 0.87 1.40 1.68 2.17 2.84 1.315 .065 .344 .344 344 .344 .344 3.449 2.946 2.690 2.240 1.625 0.878 1 5S 10S 40ST, 40S SOXS, SOS .109 .133 .179 .250 .494 .639 .836 1.076 310 287 275 250 .213 157 160 XX 0.957 0.815 0.599 358 .344 3.66
Transcribed Image Text:10-78 TRANSPORT AND STORAGE OF FLUIDS TABLE 10-22 Properties of Steel Pipe Circumference, ft, or surface, ft/ft of length Capacity at 1-ft/s velocity Cross-sectional area Nominal pipe size, in Outside diameter, Wall thickness, Weight of plain-end pipe, Ib/ft Inside diameter, Schedule Metal, in U.S. gal/ Flow, ft Outside Inside Ib/h water in no. in in min 0.307 .269 215 0.00051 .00040 .00025 0.106 .106 0.0804 .0705 0563 0.405 10S 40ST, 40S SOXS, 8OS 0.049 .068 .095 0.055 .072 0.231 .179 115.5 89.5 56.5 0.19 24 .093 .106 .113 .31 14 0.540 .097 .107 10S 40ST, 40S SOXS, 80S .065 .088 .119 .410 .364 .302 .00092 .00072 .00050 .141 .412 323 224 206.5 161.5 33 .42 .54 .125 .095 .079 .141 .157 .141 112.0 .177 .177 .177 363.5 298.0 220.0 0.675 10S .065 .125 .167 .217 .00162 .143 .129 .727 40ST, 40S SOXS, 8OS 545 .493 .00133 .00098 .42 .57 .74 .596 .091 .126 .423 .11 .440 0.840 .710 .674 .186 .176 1,234 617.0 58 10S 40ST, 40S 80XS, 8OS 160 XX .065 .083 .109 .158 .197 .250 .320 .385 .504 .00275 .00248 .00211 .00163 .00117 220 220 .220 220 .220 .220 1.112 0.945 0.730 0.527 0.155 556.0 472.0 365.0 263.5 77.5 .54 .67 .85 1.09 1.31 1.71 .622 .546 .147 .188 .294 .163 .143 .122 .066 464 252 .00035 1036.0 951.5 832.5 672.5 458.5 230,5 0.69 0.86 .065 .275 .275 275 .275 .275 .275 1.050 58 10S 40ST, 40S 80XS, 8OS .920 .884 .824 .742 .612 434 .201 .252 .333 .433 .572 .718 .00461 .00426 .00371 .00300 .00204 .00103 241 .231 .216 .194 .160 .114 2.072 1.903 .083 .113 .154 .219 1.665 1.345 0.917 0.461 1.13 1.47 1.94 2.44 160 XX .308 .00768 .00656 .00600 .00499 .00362 .00196 1.185 1.097 1.049 .255 .413 1725 1473 1345 1120 812.5 439.0 0.87 1.40 1.68 2.17 2.84 1.315 .065 .344 .344 344 .344 .344 3.449 2.946 2.690 2.240 1.625 0.878 1 5S 10S 40ST, 40S SOXS, SOS .109 .133 .179 .250 .494 .639 .836 1.076 310 287 275 250 .213 157 160 XX 0.957 0.815 0.599 358 .344 3.66
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