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首页> 外文期刊>Energy Conversion & Management >Developing and exergetic performance assessment of biogas upgrading process driven by flat plate solar collectors coupled with Kalina power cycle
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Developing and exergetic performance assessment of biogas upgrading process driven by flat plate solar collectors coupled with Kalina power cycle

机译：平板式太阳能集热器与Kalina功率循环结合驱动沼气升级过程的开发和性能评估

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摘要

The goal of this study is to develop and introduce a novel integrated system composed of water scrubbing biogas upgrading process with water regeneration, flat plate solar collectors (FPC) and Kalina power cycle. Solar thermal energy was exploited by means of FPCs and delivered to the Kalina cycle aiming at producing the electrical power required by biogas upgrading process. The excess heat in biogas upgrading cycle was recovered and fed to the Kalina cycle. The proposed system was simulated by Aspen Hysys based on the real solar data for Bushehr city. Overall, the FPCs provided 2627 kW thermal power to the Kalina cycle, where 289.5 kW electrical power was produced and delivered to the biogas upgrading process. The water scrubbing process was capable of removing the CO2 and H2S contents and provided upgraded biogas with a mass flow of 2293 kg h(-1). A comprehensive second law based thermodynamic analysis was accomplished to assess the effectiveness of the proposed cycle and the exergetic performance of the components was scrutinized and discussed thoroughly. The exergy efficiency of the proposed integrated system was found 92.36%. The highest exergy destruction was occurred in the FPCs being responsible for 73% of the whole exergy destruction. The desorption column and steam turbine had the second and third highest exergy destruction, respectively. The effects of collector's number and minimum approach temperature on the exergy efficiency, upgraded biogas production, Kalina cycle efficiency, and exergy destruction were studied and discussed as well.
机译：这项研究的目的是开发和介绍一种新型的集成系统，该系统由具有水再生功能的水洗沼气升级过程，平板太阳能集热器（FPC）和Kalina电源循环组成。太阳能热是通过FPC进行开发的，并传递到Kalina循环中，旨在产生沼气升级过程所需的电力。回收沼气提质循环中的多余热量，并将其送入卡利纳循环。拟议的系统由Aspen Hysys根据布什尔市的实际太阳能数据进行了仿真。总体而言，FPC为Kalina循环提供了2627 kW的火力，其中产生了289.5 kW的电力，并输送给了沼气升级过程。水洗过程能够去除CO2和H2S含量，并提供质量流为2293 kg h（-1）的升级沼气。完成了基于第二定律的综合热力学分析，以评估所提出的循环的有效性，并对组件的过分性能进行了仔细的检查和讨论。提出的集成系统的火用效率为92.36％。最高的火用破坏发生在FPC中，占整个火用破坏的73％。解吸塔和蒸汽轮机分别具有第二高和第三高的火用破坏力。还研究和讨论了收集器数量和最低进站温度对火用效率，沼气产量提高，卡利纳循环效率和火用破坏的影响。

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