A NOVEL LNG COLD ENERGY INTEGRATED UTILIZATION SYSTEM

Liquefied natural gas (LNG) contains abundant cold energy, which is of high grade. Reasonable recycling can help reduce energy loss, carbon emissions and contribute to the sustainable development of mankind. Aiming at the recovery and utilization of LNG cold energy, a new type of integrated system is proposed. By reasonably coupling the power generation system and the intermediate cold energy recovery system, the efficient cascade recovery and utilization of LNG cold energy can be realized. On this basis, the thermodynamic design and analysis of the cold energy power generation system in the integrated system are carried out, and the one-dimensional thermodynamic design of the two turbines in the power generation system is carried out according to the thermodynamic design results of the whole system. The results show that: the cold energy recovery rate of the power generation system is 22.74%, while the cold energy recovery rate is 33.24%. The power of the two turbines are 3952.577 kW and 2083.361 kW, respectively, and the isentropic efficiencies are 81.86% and 82.51%, respectively. The research results have certain guiding significance for practical engineering applications.