Presentations

Gas Gathering and Transportation

Description
Gas Field Engineering course.
Categories
Published
of 19
All materials on our website are shared by users. If you have any questions about copyright issues, please report us to resolve them. We are always happy to assist you.
Related Documents
Share
Transcript
  10/16/20141 GAS FIELD ENGINEERING Gas Gathering and Transportation 1 CONTENTS 3.1Introduction3.2Pipeline Design3.3 Reynolds’ Number  3.4Relative Roughness3.5Friction Factors3.6Pipeline Equations (Weymouth, Panhandle, Modified Panhandle, Clinedist )3.7Series, Parallel, and Looped Lines 2 LESSON LEARNING OUTCOME  At the end of the session, students should be able to: ã  Apply pipeline flow equations ã Design gas transportation, gathering, and distribution systems. 3  10/16/20142 3.1 INTRODUCTION ã Transmissionofnaturalgastoconsumerbedividedintothreedistinctpipelineunits: gatheringsystem , maintrunklinetransportationsystem ,and distributionsystem . ã Focusesondesignandoperationofnaturalgaspipelinesinonshoreandoffshoregasfields. 4 3.2 Pipeline Design ã Factors to be considered in the design of long-distance gas pipe-lines.  the volume and composition of the gas to be transmitted,  the length of the line  the type of terrain to be crossed  maximum elevation of the route Note: Pipe line must be larger to accommodate the greater volume of gas. 5 3.2 Pipeline Design  Severaldesignsareusuallymadesothatthe economicalone canbeselected.  Maximumcapacityofapipelineislimitedby higher transmissionpressures and strongmaterials .  Foreconomicoperation,bettertopreservefullpipelineutilization. 6  10/16/20143 3.2.1 Sizing Pipelines ã Capacity ofgastransmissioniscontrolled mainlybyitssize . ã Complex equations havebeendevelopedforsizingnaturalgaspipelinesinvariousflowconditions. o TheWeymouthequation o ThePanhandleequation o TheModified-Panhandleequation ã Byusingtheseequations, variouscombinationsofpipediameter  and wallthickness foradesired rate ofgasthroughoutcanbecalculated. 7 3.3 Friction Factor   Friction losses: o Internal losses due to viscosity effects o losses due to the roughness of the inner wall of the pipeline  Friction factor is a function of the Reynolds number and of the relative roughness of pipe. N Re = Reynolds Number e = absolute roughness of pipeD = diameter of pipe  f =  f ( N  Re  , e  D  ) 8 Equationthatrelates lostwork per  unitlength ofpipeandtheflowvariablesis 3.3 Friction Factor  9  10/16/20144 Reynolds Number  ã Reynoldsnumber( N  Re  )isdefinedasthe ratio offluid momentumforce to viscousshearforce . ã TheReynoldsnumbercanbeexpressedasa dimensionless groupdefinedas 10 Reynolds Number  Reynoldsnumber  isusedasa parameter  todistinguishbetween flowregimes . Flow TypeN Re , smooth pipesLaminar CriticalTransitionTurbulent< 20002000  – 30003000 -4000> 4000 11   Reynolds Number  ã For all practical purposes , the Reynolds number for natural gas flow problems may be expressed as 12 (11.8)

Ruivivar v Omb

Jul 23, 2017

HW1(BIO)

Jul 23, 2017
Search
Tags
Related Search
We Need Your Support
Thank you for visiting our website and your interest in our free products and services. We are nonprofit website to share and download documents. To the running of this website, we need your help to support us.

Thanks to everyone for your continued support.

No, Thanks