LNG (liquefied natural gas), stored at temperatures below -162C, requires significant energy for production and must be re-gasified before consumer distribution.Traditional regasification methods waste LNG's valuable cold energy.This study proposes an integrated system that harnesses LNG cold energy for both power generation and refrigeration.An Organic Rankine Cycle (ORC) with propane as the working fluid uses part of the LNG cold energy as a heat sink, while the remainder supports the refrigeration demand of cold storage via a CO2 cycle.Thermal and exergy efficiencies, along with other performance indicators, are analyzed using the Engineering Equation Solver (EES) software.For an LNG terminal with a capacity of 3 million tons per year (MPTA), the proposed system can generate up to 11.762 MW of electricity and directly supply 12 MW of refrigeration at optimum exergy efficiency point.The maximum greenhouse gas (GHG) reduction is estimated at 53900.2 tons of CO2 annually.
Hien Phuoc Huynh (Sun,) studied this question.