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Investigation of thermal architectures for flue-gas assisted organic rankine cycle systems: an assessment for thermodynamics and environmental performance indicators

机译：烟气辅助有机朗肯循环系统热架构的研究：热力学和环境绩效指标评估

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摘要

In calculations of future energy demand and environmental pollution problems in which waste-heat recovery play a significant role, efficiency often is the primary factor. The organic Rankine cycle (ORC) continues to attract the widespread interest of researchers and/or manufacturer due to technical compatibility, feasibility, and reliability for low to medium grade waste-heat sources. This paper presents thermo-economic analysis on flue-gas assisted organic Rankine cycles (FGA-ORCs) based on both energy and exergy concepts. The heat source of the FGA-ORC system is the exhaust flue-gas of a stenter-frame which is highly used in the textile finishing process. In this study, to convert thermal energy into electrical and/or mechanical energy, an optimization study is performed using three different cycle architectures which have two turbines. Performance indicators such as thermal efficiency, exergetic efficiency, economic profit, performance ratio, and carbon footprint index were examined for the different operating conditions of three investigated thermal architectures. Finally, under the specified operating conditions, the thermal architecture with the best thermo-economic performance was determined by the reduced exergy destruction and increased economic profit due to increased net-work output.
机译：在计算未来能源需求和环境污染问题的过程中，废热恢复发挥重要作用，效率通常是主要因素。由于技术兼容性，可靠性和低于中等余地余量来源，有机朗肯循环（ORC）继续吸引研究人员和/或制造商的广泛兴趣。本文基于能量和暴露概念呈现出烟气 - 气体辅助有机朗朗循环（FGA-ORC）的热经济分析。 FGA-ORC系统的热源是支架框架的排气烟气，其在纺织品整理过程中高度使用。在该研究中，将热能转换为电气和/或机械能，使用具有两个涡轮机的三种不同的循环架构进行优化研究。针对三次调查的热架构的不同操作条件，检查了热效率，前进效率，经济利润，性能比和碳足迹指数等性能指标。最后，在指定的操作条件下，具有最佳热经济性能的热架构取决于降低的出境破坏，由于净工作量增加而增加的经济利润增加。

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