Implementing absorption refrigeration cycle in lieu of DMR and C3MR cycles in the integrated NGL, LNG and NRU unit

In this paper, the potential of absorption refrigeration cycle to be replaced by C3MR and DMR cycles and to reduce energy consumption in the integrated structure of NGL, LNG and NRU is investigated. Having simulated and optimized, the absorption refrigeration cycle is replaced by one of the compression cycles in the two presented integrated structures, and the new integrated process with AR-MR1 refrigeration cycle (pre-cooling by absorption refrigeration system and liquefaction by mixed refrigerant) is presented. The new structures are investigated through exergy and economic analyses. The integrated structure of AR-MR1 in comparison with C3MR and DMR processes has reduced the power consumption by about 18.4% and 12.6%, respectively. Sensitivity analysis of economic parameters has been carried out with respect to the utility price as well as effect of product price on the market with respect to the presented structures.