36 replies to this topic

[Pingue2008]

Thank you Katmart.

 

Edited by Pingue2008, 15 March 2013 - 09:47 AM.

[Pingue2008]

Thank you Katmart.

My excel spreadsheet agrees with you all and also with my software

you guys have a great weekend.

 

Thanks

Attached Files

•  gas line sizing.xlsx   25.34KB   146 downloads

[Ajay S. Satpute]

Hi,

 

1. PFA hysys snapshot. Case 2 and 4 consider no heat transfer is taking place from/to to the pipeline. For upstream pressure 40 barg, ID calculated is 206 mm & velocity 19 m/s (34.5 barg downstream pressure). For upstream pressure 70 barg, ID calculated is 135 mm & velocity 44 m/s (34.5 barg downstream pressure).

 

2. Please refer to below link where Vmax for natural gas pipeline is discussed.

 

(Companies like "Shell" recommend that gas velocities in transportation of natural gas through long-distance pipelines should be in the range of 5-10 m/s for continous operation and a maximum up to 20 m/s for intermittent operation) quoted from the same link.

http://www.cheresour...g-calculations/

 

3. If you need readymade formula for pressure drop calculations, please follow below link.

http://www.cheresour...p-correlations/

 

 

Regards.

 

Ajay

Attached Files

•  HYSYS snapshot.bmp   3.19MB   52 downloads

[FUNMILAYO]

Thanks Ajay S. Satpute please i need your help,  pls could you send a link to me to be able to install HYSYS v7.3 on my PC, please could you also help me simulate a gas metering station with HYSYS that includes filter seperator, gas scrubber, heater and the pressure regulating and metering facility, i want to know if hydrate will form on the line, i also want to monitor the pressure drop along the line and the gas velocity. Thanks.

[Ajay S. Satpute]

Hi Funmilayo,

 

Please ask your company to buy hysys license. As far as I know, it is not available free online. It does have the hydrate formation prediction tool.

 

Regards.

 

Ajay

[katmar]

You shouldn't attach a new question to the end of an old, existing thread.  Rather start a new thread.

 

Also, be a bit more descriptive.  What is 36" and what is 56"?  I don't know what you mean giving two diameters.

 

My old eyes cannot cope with so many zeros all bunched together like that.  Either space them out in groups of 3 (eg 750 000 m) or use exponential notation (eg 7.5E5 m).

 

You should always define what your standard conditions are.

[fuatender]

36" pipe dimension existing excel spreadsheet .so 56 " pipe diameter can not be calculated.

sorry multi zero. 

 

my question is 56" gas pipe pressure drop for calculation existing excel spreadsheet.

 

pipe dimeter 56"

wall   thickness  26 mm

roughness 10 micron

Inlet Pressure: 90 barg

Outllet Pressure: ? barg

Molecular Weight: 17.04

Tin = 15 deg C

Tsoil = 18.9 deg C

pipe lent :7.5 E5 m

Thank you to everyone

 

Flow Rate: 100 E6 Sm3 / day 

Pipeline Efficiency Factor: 0.95

Density at 15°C, 1 atmosphere  0,72158 kg/std.cu.m

 

Best regards

 

[Pingue2008]

Fuatender,

 

please go to the following link and you find an excel spreadsheet that I have put together. just enter the known values and use goal seek to find the missing value (pressure out).

http://www.cheresour...or-natural-gas/

 

Thank you,

[Pingue2008]

Fuatender,

 

If you have found an error calculating the  Reynolds number please share. The spreadsheet has always given satisfactory results and I always check my results with another program before giving to another engineer for back check.So far the spreadsheet has produced good results (Reynolds #, etc...)

 

Thank you,

[fuatender]

Thank you for your interest and support . delta p calculation result is correct ,but ı thing reynolds number is not  true.

 

 

 

Attached Files

•  Line Sizing1 (56).xls   1.07MB   77 downloads
•  Line Sizing1 (56).xls   1.07MB   45 downloads

[fuatender]

Fuatender,

 

If you have found an error calculating the  Reynolds number please share. The spreadsheet has always given satisfactory results and I always check my results with another program before giving to another engineer for back check.So far the spreadsheet has produced good results (Reynolds #, etc...)

 

Thank you,

ı attach the spreadsheet  . 56" pipe results for about reynold number N.G Cals page.

best regards

Edited by fuatender, 19 December 2013 - 10:30 AM.

[katmar]

The flow rate you are using is MUCH less than the 100E6 Sm³/day that you specified earlier.  It seems that you have converted the length to feet, and then entered that number where the spreadsheet is asking for miles.