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Economic analysis and optimal capacity sizing of turbo-expander-based microgrid

机译：涡轮膨胀机微电网的经济分析和最佳容量选型

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摘要

These days, extensive efforts are being carried out to improve energy efficiency and energy recovery in various energy systems, such as extraction of energy from the high-pressure natural gas (NG) in pressure reduction stations (PRSs) employing a turbo-expander (TE). In conventional PRSs, NG pressure reduction is carried out by pressure regulators, leading to the loss of mechanical exergy available in the pressurised NG as heat. Thus, replacing a pressure regulator with TE allows the extraction of the mechanical exergy to change into electrical form of energy by coupling with a generator. So, a novel configuration is presented here for grid-connected microgrid based on TE. Furthermore, a new procedure is developed for optimal capacity sizing of energy resources in the proposed TE-based microgrid. Finally, optimisation results (with and without TE) and economical considerations are discussed.
机译：如今，人们正在为提高各种能源系统中的能源效率和能量回收而进行广泛的努力，例如使用涡轮膨胀机（TE）从减压站（PRS）中的高压天然气（NG）中提取能量）。在传统的PRS中，NG的减压是通过压力调节器进行的，从而导致加压NG中的机械热能损失而失去热量。因此，用TE代替压力调节器可以通过与发电机耦合来提取机械能值，从而转变为电能形式。因此，在此提出了一种基于TE的并网微电网的新型配置。此外，开发了一种新程序，用于在建议的基于TE的微电网中优化能源资源的容量估算。最后，讨论了优化结果（带或不带TE）和经济方面的考虑。

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