A novel energy efficient LNG/NGL recovery process using absorption and mixed refrigerant refrigeration cycles - Economic and exergy analyses

作者：Ghorbani Bahram; Shirmohammadi Reza; Mehrpooya Mehdi^*

来源：Applied Thermal Engineering, 2018, 132: 283-295.

DOI：10.1016/j.applthermaleng.2017.12.099

• Mixed refrigerant
• Economic analysis
• Integration
• LNG/NGL
• Absorption

A novel integrated process comprising natural gas liquids recovery along with natural gas liquefaction is investigated. Processes integration and design at the same time can reduce the number of required equipment and energy consumption in the units. Utilizing absorption refrigeration system in lieu of precooling stage of mixed fluid cascade refrigeration system in an energy efficient LNG-NGL recovery process with the main aim of reduction in required energy is investigated. High amount of energy consumption in these units is reduced due to the removal of a stage of the compression system, while the possibility of using waste thermal energy can be provided using absorption refrigeration system. The results of exergy analysis illustrate that the highest amount of exergy destruction is occurred in the air coolers before and after installation of the absorption refrigeration cycle at a rate of 56.21% and 42.72%, respectively. Sensitivity analysis has been carried out for economic parameters with respect to the utilities price as well as effect of products price on the market with respect to the presented structures.

• 出版日期2018-3-5