A novel Brayton cycle with the integration of liquid hydrogen cryogenic exergy utilization
文献类型：期刊论文
| 作者 | Zhang, Na1; Lior, Noam2 |
| 刊名 | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
 |
| 出版日期 | 2008 |
| 卷号 | 33期号:1页码:214-224 |
| 关键词 | brayton cycle nitrogen LH2 cryogenic exergy hydrogen energy storage |
| 英文摘要 | Stored or transported liquid hydrogen for use in power generation needs to be vaporized before combustion. Much energy was invested in the H-2 liquefaction process, and recovery of as much of this energy as possible in the re-evaporation process will contribute to both the overall energy budget of the hydrogen use process, and to environmental impact reduction. A new gas turbine cycle is proposed with liquefied hydrogen (LH2) cryogenic exergy utilization. It is a semi-closed recuperative gas turbine cycle with nitrogen as the working fluid. By integration with the liquid H-2 evaporation process, the inlet temperature of the compressor is kept very low, and thus the required compression work could be reduced significantly. Internally fired combustion is employed to allow a very high turbine inlet temperature, and a higher average heat input temperature is achieved also by internal heat recuperation. As a result, the cycle has very attractive thermal performance with a predicted energy efficiency over 73%. The choice of nitrogen as the working fluid is to allow the use of air as the oxidant in the combustor. The oxygen in the be air combines with the fuel H-2 to form water, which is easily separated from the N-2 by condensation, leaving the N-2 as the working fluid. The quantity of this working fluid in the system is maintained constant by continuously evacuating from the system the same amount that is introduced with the air. The cycle is environmentally friendly because no CO2 and other pollutant are emitted. An exergy analysis is conducted to identify the exergy changes in the components and the potential for further system improvement. The biggest exergy loss is found occurring in the LH2 evaporator due to the relatively high heat transfer temperature difference, dictated by the fixed temperatures of the LH2 and of the a of that in a Brayton cycle ambient combustion air, which are far apart. The exergy efficiency is 45%. The system has a back-work ratio only 1/4 with ambient as the heat sink, and thus can produce 72.7% more work, with the LH2 cryogenic exergy utilization efficiency of 50%. (C) 2007 International Association for Hydrogen Energy. |
| WOS标题词 | Science & Technology ; Physical Sciences ; Technology |
| 类目[WOS] | Chemistry, Physical ; Electrochemistry ; Energy & Fuels |
| 研究领域[WOS] | Chemistry ; Electrochemistry ; Energy & Fuels |
| 关键词[WOS] | LIQUEFIED NATURAL-GAS ; POWER-PLANTS ; CO2 CAPTURE ; COLD ENERGY ; LNG ; SYSTEM |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000253564000029 |
| 公开日期 | 2015-12-22 |
| 源URL | [http://ir.etp.ac.cn/handle/311046/106346]  |
| 专题 | 工程热物理研究所_中国科学院工程热物理所（论文库）_期刊论文（SCI） |
| 作者单位 | 1.Chinese Acad Sci, Inst Engn Thermophys, Beijing 100080, Peoples R China 2.Univ Penn, Dept Mech Engn & Appl Mech, Philadelphia, PA 19104 USA |
| 推荐引用方式 GB/T 7714 | Zhang, Na,Lior, Noam. A novel Brayton cycle with the integration of liquid hydrogen cryogenic exergy utilization[J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,2008,33(1):214-224. |
| APA | Zhang, Na,&Lior, Noam.(2008).A novel Brayton cycle with the integration of liquid hydrogen cryogenic exergy utilization.INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,33(1),214-224. |
| MLA | Zhang, Na,et al."A novel Brayton cycle with the integration of liquid hydrogen cryogenic exergy utilization".INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 33.1(2008):214-224. |
入库方式： OAI收割
来源：工程热物理研究所
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