4TH International Congress on Technology - Engineering & SCIENCE - Kuala Lumpur - Malaysia (2017-08-05)

A Pressure-temperature Model Of A Transmission Pipe During Gas Venting Process
Venting process is one of maintenance mechanisms in a petroleum and gas industry in order to to maintain safe conditions during the different phases of the treatment process of gas pipes. During the process, gases are released into the atmosphere. In many cases, gases that are being vented could be burnt or dispersed into the atmosphere. Thus, a precise time management is needed to estimate such conditions. There are some parameters that mainly contribute for these conditions, such as duration of gas venting process, the magnitude of pressure and temperature drop due to Joule-Thomson Effect, and the geometry of venting pipe. In this work, a mathematical model for estimating the duration of gas venting process and determine the pressure and temperature drop in pipeline transmission is presented. The governing equations consist of the heat-transfer model coupled with the gas density model. The equations are solved numerically using the finite difference method . Our results are then compared with results from an existing commercial software since the real data is not available yet. Both results are quite in agreement.
Keywords: Gas Venting, Joule-Thompson, Finite Difference

Agus Yodi Gunawan, Tri Juliansyah, Aditya Firman Ihsan, Abdurrahman Shofy Adianto, Darmadi Soetikno