Tracking boil off gas generation into liquefied natural gas supply chain using HYSYS simulator

1st International Conference on Petroleum Technology and Petrochemicals

石油天然气工程

Naji, S.Z.^1 ; Abd, A.A.^2 ; Hashim, A.S.^2

Petroleum Engineering Department, University of Kerbala, Iraq^1

Water Recourses Engineering College, Al-Qassim Green University, Iraq^2

关键词: Clean energy sources;    Environment regulations;    Greenhouse emissions;    Liquefied Natural Gas (LNG);    Natural-gas production;    Operation temperature;    Operational conditions;    Storage and transportations;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/579/1/012019/pdf
DOI  :  10.1088/1757-899X/579/1/012019

来源: IOP

【 摘 要 】

Liquefied natural gas (LNG) is becoming one of the prominent clean energy sources with its abundance, high potential energy, and low emission and price. Unavoidable reality is that boil off gas (BOG) generates, because of low temperature of LNG, about -162.5 °C at 101.3 kPa for storage and transportation of liquefied natural gas. As natural gas productions increasing globally, BOG and handling problems become serious critical subject in both economic and environment regulations. In this work, liquefied natural gas storage facilities and loading facilities are simulated to investigate the generated BOG by calculating the heat leaks through cargo tank, pipelines, storage tank, and the generated heat by equipment's. Later, boil off gas rates are estimated for each sector into LNG supply chain with different operational conditions, parameters and voyage time. Factors that affect BOG such as operation temperatures and pressures, methane content, and nitrogen content are presented. Current study would help to properly store and transport LNG to minimize the venting of BOG into supply chain, and thus reducing greenhouse emissions, save energy, and reducing waste of natural gas.