This paper presents a pioneering multigeneration system for marine vessel applications, involving the integration of solid oxide fuel cells (SOFCs) fueled by liquefied natural gas (LNG), coupled with LNG cold energy utilization cycles and exhaust gas heat recovery systems. The system comprises a tandem arrangement of organic Rankine cycle (ORC) and -critical carbon dioxide cycle (TCO), specifically engineered to harness the cold energy released during LNG regasification process. The elevated temperature exhaust gases emanating from the SOFC are efficiently recuperated through a series of components including a gas turbine (GT), regenerative, steam Rankine cycle (SRC), and waste heat boiler (WHB). The proton exchange membrane fuel cells (PEMFC) is designed to enhance the overall operational flexibility and responsiveness of the multigeneration system. The Aspen Hysys V12.1 is used to simulate the propose system and numerical method is employed to parameter optimize of system. The first and second laws of thermodynamics are applied to establish the thermodynamics equations and calculated the system performances. The described system is estimated to obtain energy efficiency of 69.32 % and exergy efficiency of 33.85 %. The high-temperature exhaust gas harvesting integrated systems are sufficiently generated 2091.24 kW which accounted 35.49 % of entire power generate. Furthermore, the parametric researches are implemented to examine the influence of current density, values to the performance indicators of systems. The WHB is designed to generate 1081 kg/h of superheated vapor at 170 and 405 kPa for various purposes of seafarers and equipment's onboard ship. The economic feasibility is performed to view the possibility of investment, maintenance cost and payback period for the described system.

中文翻译：

---

船用液化天然气固体氧化物燃料电池组合系统的新名称

本文介绍了一种用于船舶应用的开创性多联产系统，涉及以液化天然气（LNG）为燃料的固体氧化物燃料电池（SOFC）的集成，以及液化天然气冷能利用循环和废气热回收系统。该系统由有机朗肯循环（ORC）和临界二氧化碳循环（TCO）串联组成，专门设计用于利用液化天然气再气化过程中释放的冷能。 SOFC 发出的高温废气通过一系列组件进行有效回收，包括燃气轮机 (GT)、再生式、蒸汽朗肯循环 (SRC) 和废热锅炉 (WHB)。质子交换膜燃料电池（PEMFC）旨在增强多联产系统的整体运行灵活性和响应能力。采用Aspen Hysys V12.1对所提出的系统进行仿真，并采用数值方法对系统进行参数优化。应用热力学第一定律和第二定律建立热力学方程并计算系统性能。该系统预计能源效率为 69.32%，火用效率为 33.85%。高温废气收集集成系统充足发电2091.24千瓦，占总发电量的35.49%。此外，还进行了参数研究，以检验电流密度、数值对系统性能指标的影响。 WHB 设计用于在 170 和 405 kPa 压力下产生 1081 kg/h 的过热蒸汽，用于海员和船上设备的各种用途。执行经济可行性是为了查看所述系统的投资可能性、维护成本和投资回收期。