In this study, an innovative system is presented to co-generate water and cooling energy on the base of seawater evaporation. Salt-free vapor can be separated from the seawater through the evaporation process, meanwhile, seawater evaporated under low pressure can provide cooling energy. The compressor is employed to create a low-pressure environment for seawater, and the compression heat is recovered by a multi-effect desalination subsystem to produce freshwater. A comprehensive comparison is conducted between this system and conventional systems, considering thermodynamic, economic, and environmental aspects. Meanwhile, the exergoeconomic analysis was conducted for the proposed system. The calculation results indicate that the specific energy consumption of the proposed system is 19.77 kWh/t, which is 4.53 kWh/t lower than that of the conventional system (23.76 kWh/t). Additionally, higher gain output ratio and performance ratio can be achieved. The proposed system has a payback period of 4.24 years, which is shorter than the 6.21 years required by the conventional system, thereby demonstrating a greater economic advantage. For the environmental performance, the proposed system demonstrates a reduced CO₂ emission of only 12.55 kg/$, indicating a significant decrease of 40.29% compared to the conventional system's 21.02 kg/$. Therefore, the proposed system demonstrates improved economic and environmental performance.

中文翻译：

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基于海水蒸发的新型冷却和水热电联产系统的综合热力学、经济和环境分析


在这项研究中，提出了一种在海水蒸发的基础上共同产生水和冷却能量的创新系统。无盐蒸气可以通过蒸发过程从海水中分离出来，同时，在低压下蒸发的海水可以提供冷却能量。压缩机用于为海水创造低压环境，压缩热通过多效海水淡化子系统回收以生产淡水。该系统与传统系统进行了全面比较，考虑了热力学、经济和环境方面。同时，对所提出的系统进行了用能经济分析。计算结果表明，所提系统的比能耗为 19.77 kWh/t，比常规系统（23.76 kWh/t）低 4.53 kWh/t。此外，还可以实现更高的增益输出比和性能比。拟议系统的投资回收期为 4.24 年，短于传统系统所需的 6.21 年，从而显示出更大的经济优势。在环境性能方面，拟议的系统仅减少了 12.55 kg/$ 的_{CO 2 排放}量，与传统系统的 40.29 kg/$ 相比显着减少了 21.02%。因此，所提出的系统显示出改进的经济和环境绩效。