期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 45, 期 51, 页码 26905-26919出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2020.07.107
关键词
Organic rankine cycle; Liquefied natural gas; Thermoelectric generator; Hydrogen production
资金
- NPRP from the Qatar National Research Fund (a member of The Qatar Foundation) [NPRP 5-209-2-071]
In this study, thermodynamic simulation is developed to strengthening power generation efficiency utilizing liquefied natural gas (LNG) cold source by thermoelectric generators (TGs) for hydrogen production. Firstly, an organic Rankine cycle (ORC) is specified to use the cold energy of the LNG. Then, the cycle is simulated and the results are validated against the available research study data. Afterward, six locations are suggested to install the TGs and the effects of each of these locations on the cycle performance are evaluated. In addition, the economic evaluation of the selected system is done based on annual cash flow, levelized cost and payback time. The results indicate that the highest enhancement in thermal efficiency (TE) is related to Case d which the TG added between the seawater and LNG line. The results show that the TE will become 6.876% if the 80% output heat from the seawater enters the TG for the proposed system. From the results: by increasing the gamma(cond) and gamma(evap), the values of thermal efficiency, hydrogen production rate and W-net/W-TEG decrease. The economic analysis represented that the payback time for added TG modules with 1 $/W price for TG is 1.29 years. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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