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首页> 外文期刊>Journal of Cleaner Production >Exergo-environmental assessment and multi-objective optimization of waste heat recovery systems based on Organic Rankine cycle configurations
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Exergo-environmental assessment and multi-objective optimization of waste heat recovery systems based on Organic Rankine cycle configurations

机译：基于有机朗肯循环配置的exergo - 环境评估和垃圾热回收系统的多目标优化

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摘要

Considering the high degree of environmental degradation that has been reached, the investigation of new methods to optimize processes, besides making them sustainable, is a topic highly studied within the scientific community. Therefore, in this study, an exergetic and an environmental impact assessment had been conducted of a waste heat recovery system from a natural gas engine exhaust gas based on a simple and a regenerative organic Rankine cycle using toluene, acetone, and cyclohexane as the working fluid. Current operational data measured in the engine exhaust gas line are used for analysis purposes, allowing them to develop some parametric case studies and a multi-objective pareto optimization to obtain the best exergy and environmental performance of the ORC configurations. The results show that the highest amount of irreversibilities are presented in the heat exchangers, which implies a high opportunity for improvement in the thermal process. At a base condition, (Toluene-RORC) presented the best global efficiency (26%) and a lower potential impact on the climate change category (0.00181 kg CO2 eq/kWh) due to the construction, the operation, the maintenance, and the decommissioning phase. In contrast, the lowest value of the environmental impact achieved under the RORC multi-objective optimization was 0.001776 kg CO2 eq/kWh, with operational values for RORC of exergetic efficiency (71.98%), thermal efficiency (34.01%), and net power (176.18 kW). (C) 2020 Elsevier Ltd. All rights reserved.
机译：考虑到已经达成的高度的环境退化，除了使其可持续发展的新方法的调查是在科学界中高度研究的主题。因此，在本研究中，基于使用甲苯，丙酮和环己烷作为工作流体的简单和再生有机朗肯循环，通过基于简单和再生有机朗肯循环的自然燃气发动机废气的废热回收系统进行了蜕皮和环境影响评估。在发动机排气管线中测量的当前操作数据用于分析目的，使它们能够开发一些参数化案例研究和多目标帕累托优化，以获得兽人配置的最佳漏洞和环境性能。结果表明，热交换器中的最高不偏差量呈现在热交换器中，这意味着提高热过程的高机会。在基本条件下，（甲苯-RORC）由于施工，操作，维护和施工，呈现最佳的全球效率（26％）和对气候变化类别（0.00181公斤CO2 eq / kWh）的潜在影响。退役阶段。相比之下，在RORC多目标优化下实现的环境影响的最低值为0.001776千克CO2 eq / kWh，具有锻炼效率的RORC的操作值（71.98％），热效率（34.01％）和净功率（ 176.18 kW）。 （c）2020 elestvier有限公司保留所有权利。

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