Abstract:
While Bangladesh's natural gas output is steadily falling, demand for the fuel is rising in the
residential, industrial, and power sectors. The Bangladeshi government has planned to stop
supplying home customers with natural gas and replace it with liquefied petroleum gas (LPG),
which some private companies will import. As part of the Jolshiri Abason project, 2243 acres
of land will be developed for 8795 plots and 96745 flats, with LPG reticulation being installed
as part of the housing project to distribute gas. In this study, a transmission and distribution
network for liquefied petroleum gas has been planned for 19 sectors, where 96745 apartments
and 8795 plots of land will be developed. Gas will be provided in each apartment of six people
so that they can cook without any hassle. The total amount of energy needed to prepare a daily
dinner in each apartment has been calculated to be 29406 KJ, or 0.6 kg of LPG, and the burner
heat rating has been taken into account to be 6 KW so that the meal can be perfectly boiled.
The 96745 flats need to be supplied with 580470 KJ/S (KW) of energy during the select time.
A total of 41793.84 kg/hr of LPG must be vaporized and transmitted to the gas transmission
and distribution network in order to supply this quantity of energy. The network for distributing
and transmitting gas has been built to handle 20.00 MMSCFD of gas flow. 200DN, 150DN,
100DN, and 50DN are the pipe sizes that were intended.
Pipeline hydraulics of the sector 17A is one of the prime interests of this thesis work. The
pressure at the end of a 50DN pipeline in a certain sector, which must be in the range of 5 psi
to 10 psi for end users of LPG for effective cooking, has been determined using the general
flow equation and Weymouth equation. This specific sector contains 60 plots with a flow of
118632 SCF(V)/D overall where gas is delivered to end consumers via 50DN pipes that are
linked to 100DN pipelines, which are linked to 150DN pipelines, which are ultimately linked
to the main 200DN pipeline. Pressure is calculated as 5.548 psi and 5.198 psi at the 150 DN
pipeline by using Weymouth equation and General flow equation respectively, which is linked
to the main 200 DN pipeline from which LPG is delivered from the storage tank, and is 5 psi
at the sector's end user. Again, the pressure is evaluated as 10.285 psi (for General flow
equation) and 10.1 psi (for Weymouth equation) at the 150 DN pipeline, which is connected to
the main 200 DN pipeline from which LPG is coming from the storage tank, for a pressure of
10 psi at the end user of a particular sector.
