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Chawracteristics and applications of the cold ehat exergy of liquefied natural gas

机译:液化天然气冷能的特征与应用

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A mathematical model for predicting the low temperature exergy, pressure exergy and total cold heat exery of Liquefied Natural Gas (LNG) is developed in this paper. In the model, the liquid mixture densities are calculated by a shape factor Corresponding State method, Vapor-Liquid-Equilibrium data of LNG are predicted by an improved method and the infleucnes of real fluid effects are consdiered. The model is used to determine the various exergies, and the infleunces of ambient temeprature, system pressure and mixture component concentrations on the cold heat exergies are analyzed. Different schemes for applying the low temperature exergy and pressure exergy are proposed. Based on the modeling results, it is proposed that the schemes for applying the cold heat exergies of LNG be determined by thermodynamic cylce optimization, while considering the magnetiudes of low temeprature exergy and pressure exergy, as well as the required gas supply pressures.
机译:建立了预测液化天然气(LNG)低温,火用和总冷热的数学模型。该模型采用形状因子对应态法计算了混合气的密度,采用改进的方法预测了液化天然气的汽液平衡数据,并考虑了实际流体作用的影响。该模型用于确定各种能值,并分析了环境温度,系统压力和混合组分浓度对冷能的影响。提出了应用低温能级和压力能级的不同方案。根据建模结果,提出了通过热力学循环优化确定液化天然气的冷能应用方案,同时考虑低热能和压力本能的磁化强度以及所需的供气压力。

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