In order to utilize the associated cold energy in the process of natural gas pressure energy power generation in gas storage,a process of coupling cold energy utilization of natural gas pressure energy power generation and cold energy utilization for natural gas liquefaction process is proposed in this study,which can improve energy conversion efficiency and project economy.It is essential to model the process by using Aspen Plus software,and evaluate the Exergy efficiency & Exergy loss accordingly.The results showed that compared with a single pressure energy generation system,the exergic efficiency of natural gas pressure energy generation coupled with cold energy utilization technology increased by 24.56％.On the other hand,the recovered cooling energy is used as the cooling source of LNG process,which saves electricity up to 3.433 x 107 kWh per year,with a good effect of energy saving and carbon reduction.
gas storagepressure energy generationcold energy utilizationexergy analysisintegrated energy solution
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