Abstract Internal combustion engines are of the important systems with extensive applications in power generation and agricultural/industrial machines and vehicles due to their promising features such as high thermal efficiency, and reliability. The reuse of the exhaust gas and jacket water waste heat is an effective method to improve engine performance and decrease fuel consumption and environmental pollution. In this paper, to recover the waste heat of a diesel engine, cogeneration of electrical power and freshwater is proposed. The Kalina cycle is used for power generation through the utilization of exhaust gas energy, and for freshwater production, the HDH system is employed using jacket water energy. Thermodynamic and exergoeconomic analysis and optimization are applied to the proposed system. The effect of several parameters on net output power, exergy efficiency, HDH unit performance, and the sum unit cost of the system's product is studied. The comparison of the Multi-objective optimization results with the base case outcomes betokens that the thermal efficiency and exergy efficiency are improved by 1.88% and 1.52%, respectively. Moreover, the SUCP value is reduced by 0.94 $/GJ. For the electricity sale price of 0.09 $/kWh, the payback period is estimated 7.2 years, and the NPV at the end of the plant's life obtained 165,814 $.

中文翻译：

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低温柴油机余热回收加湿-除湿混合Kalina系统工效经济分析与优化

摘要 内燃机具有热效率高、可靠性好等优点，是发电、农业/工业机械和车辆中广泛应用的重要系统。废气和夹套水余热的再利用是提高发动机性能、降低油耗和环境污染的有效方法。在本文中，为了回收柴油机的余热，提出了电力和淡水的热电联产。Kalina循环利用废气能发电，淡水生产利用夹套水能采用HDH系统。热力学和热力学分析和优化被应用于所提出的系统。研究了几个参数对净输出功率、火用效率、HDH 单元性能和系统产品的总成本的影响。多目标优化结果与基本情况结果的比较表明，热效率和火用效率分别提高了 1.88% 和 1.52%。此外，SUCP 值降低了 0.94 美元/GJ。对于 0.09 美元/千瓦时的售电价格，预计投资回收期为 7.2 年，电厂寿命结束时的 NPV 为 165,814 美元。此外，SUCP 值降低了 0.94 美元/GJ。对于 0.09 美元/千瓦时的售电价格，预计投资回收期为 7.2 年，电厂寿命结束时的 NPV 为 165,814 美元。此外，SUCP 值降低了 0.94 美元/GJ。对于 0.09 美元/千瓦时的售电价格，预计投资回收期为 7.2 年，电厂寿命结束时的 NPV 为 165,814 美元。