Vapor Pressure Drop
3
Instructions 1 This workbook is NOT write protected. 2 Enter values into the shaded boxes ONLY. If you enter anything into any cell with an equation in it that equation will be lost. To recover, exit without saving and reopen the file. 3 This workbook is to be used to calculate the pressure drop in a vapor line. 4 Changes in vertical head or height are NOT included in this version of the spreadsheet. 5 This spreadsheet assumes pipe lengths are actual lengths or equivalent lengths. The user must input either the actual or equuivalent length of the sample system in the cell labeled length. 6 Pressure drop can be calculated based on sample line length or a specified flow rate. The sample line lengths are entered in cells B17 and B18 while the sample flow rate is entered in cell B55. DISCLAIMER This spreadsheet is offered as a service to users. The author assumes no liability from its use. It is the responsibility of anyone using this spreadsheet to confirm the process data input and resulting calculations.
description
engineering.
Transcript of Vapor Pressure Drop
Instructions
1 This workbook is NOT write protected.
2 Enter values into the shaded boxes ONLY. If you enter anything into any cell with an equation in it that
equation will be lost. To recover, exit without saving and reopen the file.
3 This workbook is to be used to calculate the pressure drop in a vapor line.
4 Changes in vertical head or height are NOT included in this version of the spreadsheet.
5 This spreadsheet assumes pipe lengths are actual lengths or equivalent lengths. The user must input
either the actual or equuivalent length of the sample system in the cell labeled length.
6 Pressure drop can be calculated based on sample line length or a specified flow rate. The sample line
lengths are entered in cells B17 and B18 while the sample flow rate is entered in cell B55.
DISCLAIMER
This spreadsheet is offered as a service to users. The author assumes no liability from its use. It is the
responsibility of anyone using this spreadsheet to confirm the process data input and resulting
calculations.
Project Title:
File No.:
Engineer:
Properties:
Density (lb/ft3) 0.01105
Molecular Weight 18.015 (Specific Gravity * 28.964)
Viscosity (cp) 21.13
Calculated:
Density (lb/ft3) 0.01105
Viscosity (cp) 21.13 (0.6 S.G. Natural Gas)
Basis: Time Lag Allowed
Pressure (psia) 14.7
Temperature (F) 60
Lag (sec.) 111.6 Subtract analyzer response time from total maximum lag time
Length - Source (ft) 250
Length - Return (ft) 1
Line Roughness 0.00006 Drawn Tubing: 0.00006
Steel Wrought Iron: 0.0018
Source P (psig) 60
Source T (F) 302
Calculations Tubing ID based on 3500 psi strength
Line O.D. (in.) 1/16 1/8 1/4 3/8 1/2 5/8 3/4
Line I.D. (in.) 0.03 0.069 0.18 0.305 0.43 0.495 0.584
Volume (ft3)
Source 0.0012 0.0065 0.0442 0.1268 0.2521 0.3341 0.4650
Return 0.0000 0.0000 0.0002 0.0005 0.0010 0.0013 0.0019
Flow (scfh)
Source 4.85E-06 2.56E-05 0.000174 0.000501 0.000995 0.001318 0.001835
Return 4.85E-06 2.56E-05 0.000174 0.000501 0.000995 0.001318 0.001835
Velocity (ft/sec)
Source 0.0003 0.0003 0.0003 0.0003 0.0003 0.0003 0.0003
Return 0.0003 0.0003 0.0003 0.0003 0.0003 0.0003 0.0003
Reynold's No.
Source 5.33E-07 1.23E-06 3.2E-06 5.42E-06 7.63E-06 8.79E-06 1.04E-05
Return 5.33E-07 1.23E-06 3.2E-06 5.42E-06 7.63E-06 8.79E-06 1.04E-05
Flow Regime
Source Laminar Laminar Laminar Laminar Laminar Laminar Laminar
Return Laminar Laminar Laminar Laminar Laminar Laminar Laminar
Relative Roughness 0.002 0.00087 0.000333 0.000197 0.00014 0.000121 0.000103
Moody Friction Fact.
Source 1.2E+08 52243222 20026568 11818958 8383215 7282388 6172572
Return 1.2E+08 52243222 20026568 11818958 8383215 7282388 6172572
Press. Drop. (psig)
Source 0.270318 0.051041 0.0075 0.002612 0.001314 0.000992 0.000713
Return 0.270318 0.051041 0.0075 0.002612 0.001314 0.000992 0.000713
Press. Drop. (in. W.C.)
Source 7.48674 1.41363 0.207725 0.072349 0.0364 0.027468 0.019734
Return 7.48674 1.41363 0.207725 0.072349 0.0364 0.027468 0.019734
Basis: Sample Flow Rate
Page 2
Sample Flow (scfm) 1.27134 76.2804 (scfh) 36000 (cc/min)
Sample Flow (cc/min) 36000.53
Calculations
Line O.D. (in.) 1/16 1/8 1/4 3/8 1/2 5/8 3/4
Line I.D. (in.) 0.03 0.069 0.18 0.305 0.43 0.495 0.584
Transit Time (sec)
Source 0.23 0.89 2.33 3.94 5.56 6.40 7.55
Return 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Velocity (ft/sec)
Source 4316.59 815.99 119.91 41.76 21.01 15.86 11.39
Return 4316.59 815.99 119.91 41.76 21.01 15.86 11.39
Reynold's No.
Source 8.3903 3.647956 1.398383 0.825275 0.58537 0.508503 0.431009
Return 8.3903 3.647956 1.398383 0.825275 0.58537 0.508503 0.431009
Flow Regime
Source Laminar Laminar Laminar Laminar Laminar Laminar Laminar
Return Laminar Laminar Laminar Laminar Laminar Laminar Laminar
Relative Roughness 0.002 0.00087 0.000333 0.000197 0.00014 0.000121 0.000103
Moody Friction Fact.
Source 7.627856 17.54407 45.76714 77.54987 109.3326 125.8596 148.4889
Return 7.627856 17.54407 45.76714 77.54987 109.3326 125.8596 148.4889
Press. Drop. (psig)
Source 4253335 151991.1 3281.894 398.1211 100.7722 57.3844 29.61851
Return 4253335 151991.1 3281.894 398.1211 100.7722 57.3844 29.61851
Press. Drop. (in. W.C.)
Source 1.18E+08 4209546 90895.34 11026.36 2790.987 1589.318 820.3143
Return 1.18E+08 4209546 90895.34 11026.36 2790.987 1589.318 820.3143
Page 3
