OPTIMIZATION OF LIQUEFIED PETROLEUM GAS TERMINAL CONFIGURATION OF PT X IN SOUTH KALIMANTAN USING MIXED INTEGER LINEAR PROGRAMMING

• Main Author: Andrew
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/83906
• Institution: Institut Teknologi Bandung

The current LP-Gas supply chain network of PT X in South Kalimantan is inefficient. Due to the height limitations of Barito Bridge, only Lighter types of ship could supply LP-Gas Terminal Y. Several main roads and bridges also became impassable due to flood disasters which contributes to high distribution cost. The supply chain inefficiencies are mainly caused by environmental factors. To deal with those factors PT X must build a new facility. The new facility would operate alongside LP-Gas Terminal Y. Therefore, the demand would be split between the two facilities. To solve the problem, a MILP model that considers the operational expenditure of operating a terminal and capital expenditure of building a new terminal is developed to determine the operations alternative of each terminal to be built. The model considers volume balance, transportation route operation, jetty installation, operation, and sizing, pressure tanks installation, operation, and sizing, filling shed installation and operation, and the sizing of number of workers. The developed model proposed that PT X should install a new terminal in Pantai Joras with a daily objective throughput of 716.55 MT/day, along with a jetty with a trestle length of 2,068 meters, one spherical tank with a capacity of 2500 MT and four filling sheds. Furthermore, LP-Gas Terminal Y should operate alongside Pantai Joras without installing any new facilities. The daily throughput of LP-Gas Terminal Y is 430.059 MT/day. The proposed solution resulted in the total cost of $236,990,160.09 which is lower than if only LP-Gas Terminal Y resumed operation with the total cost of $248,607,975.99. The lower total cost is attributed to the lower supply cost because in the optimal alternative, Small Pressurized II type of ship is used rather than Lighter type of ship to fulfill the LP-Gas demand.