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首页> 外文期刊>Journal of Cleaner Production >Global warming potential and net power output analysis of natural gas combined cycle power plants coupled with CO_2 capture systems and organic Rankine cycles
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Global warming potential and net power output analysis of natural gas combined cycle power plants coupled with CO_2 capture systems and organic Rankine cycles

机译：天然气联合循环发电厂结合CO_2捕集系统和有机朗肯循环的全球变暖潜力和净功率输出分析

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The objective of this study was to analyze the environmental and energetic analysis of a natural gas combined cycle (NGCC) power plant integrated with post-combustion carbon capture (PCC) and an organic Rankine cycle (ORC) as an alternative to increase net power output using thermal integration between the three processes. This study consisted of the calculation of the global warming potential (GWP) and the net power output as a function of the amount of CO2 captured. For the analysis, the base was taken as the simulation of a 453-MWe NGCC power plant with a monoethanolamine-based PCC process and an ORC. The base case shows that the ORC could generate a considerable amount of energy using a stream of hot water to evaporate the working fluid; this stream was previously extracted from the low pressure turbine and used in the stripper reboiler. Then three study cases were considered. For case 1 (NGCC + PCC + ORC), the power output is 381.2 MW with a capture of 42.43 kg/s of CO2 and a production of 2.02 MW in the ORC with a GWP of 94.75 g CO(2)e/kWh. For case 2, exhaust gas recirculation (EGR) was considered. For this case, the energy production is 386.52 MW, with 1.905 MW produced in the ORC. For case 3 with PCC and NGCC thermal integration, the net power output is 391.42 MW. These three cases were analyzed and the amount of combustive gases were varied to determine the effect on the power output, CO2 captured, and the GWP of these processes. The results show the tradeoffs between the considered goals and set an objective framework for policymakers to better operate these types of systems. (C) 2018 Elsevier Ltd. All rights reserved.
机译：这项研究的目的是分析天然气联合循环（NGCC）发电厂的环境和能量分析，该电厂结合了燃烧后碳捕获（PCC）和有机朗肯循环（ORC）作为增加净发电量的替代方案在三个过程之间使用热集成。这项研究包括计算全球变暖潜势（GWP）和净输出功率与捕获的CO2量的关系。为了进行分析，该基础被用作具有单乙醇胺基PCC工艺和ORC的453 MWe NGCC电厂的仿真。基本情况表明，ORC可以使用热水流蒸发工作流体来产生大量能量。该物流先前是从低压涡轮中提取的，并用于汽提塔再沸器中。然后考虑了三个研究案例。对于案例1（NGCC + PCC + ORC），功率输出为381.2 MW，捕获的CO2为42.43 kg / s，ORC的产量为2.02 MW，GWP为94.75 g CO（2）e / kWh。对于情况2，考虑了废气再循环（EGR）。在这种情况下，发电量为386.52兆瓦，其中ORC发电量为1.905兆瓦。对于具有PCC和NGCC热集成的情况3，净输出功率为391.42 MW。分析了这三种情况，并改变了可燃气体的量，以确定对这些过程的功率输出，捕获的二氧化碳和全球升温潜能值的影响。结果表明，在考虑的目标之间进行了权衡，并为政策制定者设定了一个目标框架，以更好地操作这些类型的系统。 （C）2018 Elsevier Ltd.保留所有权利。

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