Capacity analysis of transmission pipeline For sustainable gas supply to Shahjibazar industrial area

Abstract

In 2011-12, Jalalabad Gas Transmission and Distribution System Limited (JGTDSL) constructed about 6 km; 10"/8" diameter transmission line from Shahjibazar TBS to provide gas connection to PRAN-RFL. Later, JGTDSL constructed a 8-9 km; 8" diameter transmission line to supply gas to various customers along the Dhaka-Sylhet highway. Due to the proximity of the gas fields, many investors and renowned companies like SQUARE GROUP, RAK PAINT, STAR CERAMICS, COOPER TECH etc. constructed new plants along the Dhaka-Sylhet Highway around Shahjibazar area.As a result, low gas pressure problem gradually arises and these establishments are not able to run at fullcapacity. The current pipeline system cannot cope up with the growing industrial activities in this area. Moreover, the expansion of the Dhaka-Sylhet highway compels the said pipelines to be relocated.

Considering the economic lifespan of the factoriesit is necessary to conduct a thorough study on the current network. The proposed project aims to examine the current gas supply infra-structure in this area and to analyze the current system capacity, and propose solutions for future gas demand for the purpose of building a sustainable gas supply infrastructure.

Under this project, the gas supply situation of existing gas network has been reviewed using simulation software. An attempt has been made to find out the best option by considering four alternative scenarios for developing a sustainable gas supply infrastructure. It is proposed to construct a new transmission pipeline of 16"dia x 18.7 km × 150 Psig. to supply gas at the right pressure and quantity to the industrial customers in Shahjibazar area.