In recent years, attentions are focused on the application of cutting-edge reactors to utilize the remarkable virtues such as safety and also higher thermal efficiency. Sodium-cooled fast reactors (SFRs) are midst the promising types of fourth generation reactors for their non-reacting behavior and packed configurations, which are considered as heat source of various thermodynamic systems. Accordingly, nitrogen Brayton cycle could be devised as power conversion system (PCS) of the mentioned sodium cooled reactors, due to its simple arrangement. In present study, proposing the topping system of nitrogen Brayton cycle as a power generation system which is driven by the sodium reactor system, Kalina and heat pump cycles, as bottoming cycles, were designed to increase the performance of the overall system by integration with topping system. Subsequently, energy, exergy and exergoeconomic analyses were carried out to examine the reliability of the proposed system. The results displayed that under operating conditions, thermal efficiency, exergetic efficiency of the proposed system are 34% and 62%, respectively. Furthermore, using the exergy point of view, it was revealed that steam generator heat exchanger, SGHX, is the foremost cause of exergy destruction. Also, in order to attain an inclusive insight over the system, a parametric analysis was conducted. Therefore, investigating the influence of alterations in key features of the overall cycle, several optimum working conditions, such as optimal basic concentration of ammonia in Kalina cycle, optimal turbines (I&II) expansion ratio and low-pressure compressor pressure ratio etc., were derived.

中文翻译：

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通过将卡林纳和热泵循环与氮气封闭布雷顿系统集成的新型混合系统的能量经济分析

近年来，尖端反应堆的应用受到关注，以利用其安全性和更高热效率等显着优点。钠冷快堆（SFR）因其非反应行为和填充结构而成为有前景的第四代反应堆类型，被认为是各种热力学系统的热源。因此，氮布雷顿循环由于其简单的布置可以被设计为上述钠冷反应堆的功率转换系统（PCS）。在本研究中，提出了氮布雷顿循环的顶系统作为由钠反应器系统驱动的发电系统，卡林纳循环和热泵循环作为底循环，旨在通过与顶循环的集成来提高整个系统的性能系统。随后，进行了能源、火用和火用经济分析，以检查所提出系统的可靠性。结果显示，在运行条件下，该系统的热效率、火能效率分别为34%和62%。此外，从火用的角度来看，蒸汽发生器热交换器 SGHX 是火用破坏的首要原因。此外，为了获得对系统的全面了解，还进行了参数分析。因此，通过研究整个循环关键特征变化的影响，推导出卡林纳循环最佳氨基本浓度、最佳汽轮机（I&II）膨胀比和低压压气机压力比等最佳工况。 。