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首页> 外文期刊>International journal of hydrogen energy >Energy, exergy, economic and environmental (4E) analysis of using city gate station (CGS) heater waste for power and hydrogen production: A comparative study
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Energy, exergy, economic and environmental (4E) analysis of using city gate station (CGS) heater waste for power and hydrogen production: A comparative study

机译：使用城门站（CGS）加热器废料发电和制氢的能源，火用，经济和环境（4E）分析：比较研究

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This paper deals with energy, exergy, economic, and environmental (4E) analysis of two new combined systems for simultaneous power and hydrogen production. The combined systems are integrated from a city gate station (CGS) system, a Rankine cycle (RC), an absorption power cycle (APC), and a proton exchange membrane (PEM) electrolyzer. Since the pressure of natural gas (NG) in transmission pipeline is high, this pressure is reduced at CGS to a lower pressure. However, this NG has also ample potential to be recovered for multiple productions, too. In the proposed systems, the outlet energy of NG is used for power and hydrogen production by employing RC/APC and PEM electrolyzer. The power sub-cycles are driven by waste heat of CGS, while PEM electrolyzer is driven by this waste heat along with a portion of CGS-Turbine output power. A comprehensive thermodynamic modeling and parametric study of the proposed combined systems are conducted from the 4E analysis viewpoint. The results of two proposed systems are compared with each other, considering a fixed value of 1 MW for RC and APC-Turbines power. Under the same external conditions and using steam as working fluid of RC, the thermal efficiency of the combined CGS/PEM-RC and -APC systems are obtained 32.9% and 33.6%, respectively. The overall exergy efficiency of the combined CGS/PEM-RC and -APC systems are also calculated by 47.9% and 48.9%, respectively. Moreover, the total sum unit cost of product (SUCP) and CO2 emission penalty cost rate are obtained 36.9 $/GJ and 0.033 $/yr for the combined CGS/PEM-RC and 36 $/GJ and 0.211 $/yr for the combined CGS/PEM-APC systems, respectively. The results of exergy analysis also revealed that the vapor generator (in both systems) has the main contribution in the overall exergy destruction.
机译：本文介绍了同时用于发电和制氢的两个新的组合系统的能源，火用，经济和环境（4E）分析。组合后的系统由城市门站（CGS）系统，朗肯循环（RC），吸收功率循环（APC）和质子交换膜（PEM）电解器集成而成。由于传输管道中的天然气（NG）压力较高，因此在CGS处该压力降低至较低压力。但是，这种天然气也有足够的潜力可用于多种生产。在提出的系统中，通过使用RC / APC和PEM电解槽将NG的出口能量用于发电和制氢。子循环由CGS的废热驱动，而PEM电解槽由该废热以及部分CGS-涡轮输出功率驱动。从4E分析的角度对建议的组合系统进行了全面的热力学建模和参数研究。考虑到RC和APC涡轮机功率的固定值为1 MW，将两个拟议系统的结果相互比较。在相同的外部条件下，使用蒸汽作为RC的工作流体，组合的CGS / PEM-RC和-APC系统的热效率分别达到32.9％和33.6％。组合的CGS / PEM-RC和-APC系统的总火用效率也分别计算出47.9％和48.9％。此外，对于CGS / PEM-RC组合，产品总单位成本（SUCP）和CO2排放罚款成本率分别为36.9 $ / GJ和0.033 $ / yr，对于组合，则为36 $ / GJ和0.211 $ / yr分别为CGS / PEM-APC系统。火用分析的结果还表明，蒸汽发生器（在两个系统中）在火用的整体破坏中起主要作用。

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