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首页> 外文期刊>Energy Conversion & Management >Design and thermodynamic analysis of a novel methanol, hydrogen, and power trigeneration system based on renewable energy and flue gas carbon dioxide
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Design and thermodynamic analysis of a novel methanol, hydrogen, and power trigeneration system based on renewable energy and flue gas carbon dioxide

机译：基于可再生能源和烟气二氧化碳的新型甲醇，氢气和动力学系统的设计与热力学分析

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摘要

In this paper, a new trigeneration system is proposed to decrease atmospheric carbon dioxide emission and produce methanol, hydrogen, and power. The system is composed of an organic Rankine cycle, a direct methanol fuel cell, a carbon capture unit, a proton exchange membrane electrolyzer, and a methanol synthesis unit. A flue gas stream with a defined composition, solar energy, and the atmospheric air are the system?s inlets. In the design step, special attention is paid to heat and mass integration between different components so that its waste can be lowered as much as possible. Then, mass balance law, energy conservation principle, exergy relations, and auxiliary equations are applied for each subsystem to investigate the system's thermodynamic performance. Also, the effect of changing operating parameters on the performance of each subsystem is studied. The obtained results show that the proposed system has the energy and exergy efficiencies of 66.84% and 55.10%, respectively. Furthermore, 94% of the total exergy destruction rate belongs to the water electrolyzer, while the contribution of the organic Rankine cycle is negligible. The performance of the methanol synthesis reactor depends strongly on its inlet temperature. Maximum equilibrium methanol concentration and carbon dioxide conversion are achieved at the inlet temperature of 210 degrees C. The parametric studies reveal that there is an optimum fuel cell current density in which its produced power density is maximized.
机译：在本文中，提出了一种新的三合组系统来降低大气二氧化碳排放并产生甲醇，氢气和功率。该系统由有机朗肯循环，直接甲醇燃料电池，碳捕获单元，质子交换膜电解槽和甲醇合成单元组成。具有规定的组合物，太阳能和大气空气的烟道气流是系统的入口。在设计步骤中，特别注意不同部件之间的热量和质量集成，使其废物可以尽可能地降低。然后，对每个子系统应用质量平衡法，节能原理，助力关系和辅助方程来研究系统的热力学性能。此外，研究了改变操作参数对每个子系统性能的影响。得到的结果表明，该拟议的系统分别具有66.84％和55.10％的能源和漏洞。此外，94％的总漏洞破坏率属于水电解槽，而有机朗肯循环的贡献可以忽略不计。甲醇合成反应器的性能强烈取决于其入口温度。在210℃的入口温度下实现最大平衡甲醇浓度和二氧化碳转化。参数研究表明，存在最佳燃料电池电流密度，其中产生功率密度最大化。

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