Break Even Point analysis of liquefied natural gas process and optimization of its refrigeration cycles with technical and economic considerations

Natural gas liquefaction is an expensive process with high energy consumption. Higher mini-LNG capacities have high capital and operating costs meanwhile that will have more product and profit. Therefore, one of the main concerns for the construction on Liquefied Natural Gas (LNG) plants is the optimization of capacities with economic tradeoff for minimizing the cost. In this paper, the mini-LNG production units are simulated in Aspen HYSYS and then in different capacities of the unit, using Aspen Capital Cost Estimator software, economic analysis is implemented. Also, this work focused on the cost optimization for various processes with different capacities. The simulation variable in this simulation is unit capacity, which is performed in capacities of 500, 750,1000, 1250 and 1500 metric tons per day. For each capacity, the capital cost (CAPEX) and operating cost (OPEX) are evaluated. Finally, the Break Even Point (BEP) and optimum capacity for these mini-LNG plants is obtained. (c) 2021 Elsevier Ltd. All rights reserved.

Automated summary

The study focuses on cost optimization for mini-LNG production units through simulation and economic analysis to reduce construction and operating costs. By evaluating capital and operating costs for different capacities, the Break Even Point and optimum capacity for mini-LNG plants are determined.