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首页> 外文期刊>Applied thermal engineering: Design, processes, equipment, economics >A combined system utilizing LNG and low-temperature waste heat energy
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A combined system utilizing LNG and low-temperature waste heat energy

机译：利用液化天然气和低温余热能的组合系统

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This paper has proposed a combined system, in which both the exergy of liquefied nature gas (LNG) and low-temperature waste heat energy can be effectively utilized. A multi-objective optimal model containing four factors: net output power, total investment cost, heat availability and dynamic investment recovery period has been built Based on it, a thermodynamic and thermal-economic analysis on the system has been conducted with eight organic working fluids. Cycle performance of both the novel system and separated LNG and ORC system has been comparatively analyzed. The results show that the combined system has more net output power, lower total investment cost and larger heat availability factor than separated systems. And n-pentane emerges as the most suitable working fluid. Meanwhile, the influence of temperature and LNG parameters on F(X) is also analyzed. Moreover, the turbine's share is the largest; accounting for 43% to 50% of the total cost, and the condenser's exergy loss in the combined system is the most. (C) 2015 Elsevier Ltd. All rights reserved.
机译：本文提出了一种可以有效利用液化天然气（LNG）和低温余热能的组合系统。建立了包含以下四个因素的多目标最优模型：净输出功率，总投资成本，热能利用率和动态投资回收期。在此基础上，使用八种有机工质对系统进行了热力学和热经济分析。 。比较分析了新型系统以及分离的LNG和ORC系统的循环性能。结果表明，与单独系统相比，组合系统具有更高的净输出功率，更低的总投资成本和更大的热利用率。正戊烷是最合适的工作流体。同时，还分析了温度和LNG参数对F（X）的影响。此外，涡轮机的份额最大。占总成本的43％至50％，并且在组合系统中冷凝器的火用损失最大。 （C）2015 Elsevier Ltd.保留所有权利。

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