ABSTRACT:

This study focuses on the comparisons of liquefaction technologies in LNG plant. And study findings suggest a strategy for effective liquefaction process design. The best process requires less power and handles larger capacity. One of the key challenges in LNG plant is to get the optimal design of liquefaction process according to the costbenefit analysis for each process. To design the liquefaction process, our team changed main equipment conditions. Our team made models of various commercial liquefaction processes. In this paper, both modeling and optimization in liquefaction process were carried out to obtain liquefaction process efficiency improvement.

INTRODUCTION

Despite numerous attempts to develop alternative energy, oil is the most dominant source of energy in the global energy market. But, the global energy market structure has been changing sharply because of environmental restrictions. The natural gas is growing rapidly in the global energy market. Natural gas is a clean source of energy and is preferred because it offers a number of significant environmental benefits over other fossil fuels such as oil and coal. The global use of LNG is increasing sharply. World LNG demands expand from 159 million ton in 2006 to 500 million ton in 2030, achieving 3.6- fold growth. Because much of the gas reserves in the world are found in offshore fields, gas found offshore is brought onshore to be processed and liquefied at about -160°C for export. Traditionally, natural gas trapped offshore is transported to the land by the local seabed pipelines, which become economically challenging in remote or deep water locations. FPSO is a floating vessel that is designed to receive oil or gas produced from nearby platforms or subsea template, to process it, and to store it until oil or gas can be offloaded onto a tanker or transported through a pipeline.

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