The reliquefaction process of boil-off gas (BOG) in a propane plant using the reverse Brayton cooling cycle was examined by simulating the operational parameters and system performance of a propane reliquefaction plant in Aspen HYSYS software. The simulation considered various process and design parameters and their effects on the BOG production rate, energy consumption demand, and coefficient of performance (COP) of the cycle. The results demonstrate that the inclusion of methane in the propane product has a considerable impact on the generation of BOG, but this comes at a cost because power consumption increases significantly and the cycle's COP decreases. Furthermore, heat transmission from the surrounding air through the tank insulation and the temperature at which propane is returned from the jetty influence the BOG generation.

中文翻译：

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丙烷储存厂中蒸发气体再液化的研究

通过在 Aspen HYSYS 软件中模拟丙烷再液化装置的运行参数和系统性能，检查了使用反向布雷顿冷却循环的丙烷装置中蒸发气体 (BOG) 的再液化过程。模拟考虑了各种工艺和设计参数及其对 BOG 生产率、能耗需求和循环性能系数 (COP) 的影响。结果表明，丙烷产品中含有甲烷对 BOG 的产生有相当大的影响，但这是有代价的，因为功耗显着增加，循环的 COP 降低。此外，周围空气通过储罐隔热层的热传递以及丙烷从码头返回的温度也会影响蒸发气体的产生。