In this research, an innovative and clean shipboard Sustainable Hybrid Energy and Carbon Capture System (SHECCS) is proposed, addressing the energy demand of a ship in both sailing and mooring modes. To comprehensively utilize renewable energy, LNG cooling energy, and ship waste heat, the SHECCS integrates multiple subsystems, including the Carbon Capture Subsystem, Liquefied CO₂ Subsystem, Carnot Battery Subsystem, Multi-Effect Distillation Desalination Subsystem, Ejector Refrigeration Cycle Subsystem, Organic Rankine Cycle Subsystem, and Photovoltaic Panels. Together, these subsystems enable carbon capture and liquefaction, energy storage, distilled water production, refrigeration, and power generation for ships. The system's performance is evaluated using energy, exergy, environmental, and economic (4E) assessments. The effects of the split ratio, direct normal irradiance, liquid-to-gas ratio, and exhaust gas flow rate on the system are investigated. Additionally, considering the intermittency and fluctuation of solar resources, the impact of storage duration on the system is also analyzed. Under the design conditions, the system's distilled water production and cooling capacity are 21.710 m³/day and 121.800 kW, respectively. The optimization of the system uses all-day energy efficiency, all-day primary energy ratio, and payback period as objectives. The results indicate that the system achieves an all-day energy efficiency of 39.320% and an all-day exergy efficiency of 40.290%. Regarding the environmental analysis, the all-day primary energy ratio and Energy Efficiency Design Index are 4.486 and 8.164 G/t·nmile, respectively. The system has a payback period of 12.990 years and a total investment cost of $6.214×10⁶.

中文翻译：

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液化天然气动力船舶中可持续混合能源和碳捕获系统的 4E 分析和多目标优化


在这项研究中，提出了一种创新和清洁的船载可持续混合能源和碳捕获系统 （SHECCS），解决了船舶在航行和系泊模式下的能源需求。为综合利用可再生能源、LNG 冷却能和船舶余热，SHECCS 集成了多个子系统，包括碳捕获子系统、液化 CO ₂ 子系统、卡诺电池子系统、多效蒸馏海水淡化子系统、喷射器制冷循环子系统、有机朗肯循环子系统和光伏板。这些子系统共同实现了碳捕获和液化、能源储存、蒸馏水生产、制冷和船舶发电。该系统的性能使用能源、用能、环境和经济 （4E） 评估进行评估。研究了分流比、直接法向辐照度、液气比和废气流速对系统的影响。此外，考虑到太阳能资源的间歇性和波动性，还分析了存储持续时间对系统的影响。在设计条件下，该系统的蒸馏水生产和冷却能力分别为 21.710 m³/day 和 121.800 kW。系统优化以全天能效、全天一次能源比例和投资回收期为目标。结果表明，该系统实现了 39.320% 的全天能效和 40.290% 的全天用能效率。在环境分析方面，全天一次能源比值和能源效率设计指数分别为 4.486 和 8.164 G/t·nmile。该系统的投资回收期为 12.990 年，总投资成本为 6.214×10 美元 ⁶ 。