MSR Supercritical Carbon Dioxide Brayton Cycle System and Thermodynamic Analysis

被引：0
|
作者：
Lu H. [1 ]
Zhao H. [1 ]
Dai Y. [1 ]
Chen X. [1 ]
Jia G. [1 ]
Zou Y. [1 ]
机构：
[1] Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai
来源：
Hedongli Gongcheng/Nuclear Power Engineering | 2022年 / 43卷 / 02期
关键词：
Brayton; MSR; SCO[!sub]2[!/sub; Thermodynamic analysis;
D O I：
10.13832/j.jnpe.2022.02.0032
中图分类号：
学科分类号：
摘要：
Molten salt reactor (MSR) can realize on-line packing and post-processing, and the outlet temperature is higher, so it shall be equipped with an innovative cycle mode that matches its outlet temperature, and can achieve higher cycle efficiency. In this paper, a supercritical carbon dioxide (SCO2) Brayton cycle system is designed based on the small modular molten salt reactor (smTMSR-400) designed by Shanghai Institute of Applied Physics, Chinese Academy of Sciences. The effects of split ratio, compressor/turbine efficiency, outlet temperature of main compressor and heat exchange temperature difference/resistance of low temperature heat exchanger on SCO2 Brayton cycle system are analyzed by using the control variable method. The analysis results show that: ①there is an optimal split ratio to make the temperature difference between the two sides of the low temperature heat exchanger equal; ②compared with the compressor efficiency, the equal-amplitude turbine efficiency improvement can make the system cycle efficiency and exergy efficiency higher; ③ the increase in the outlet pressure of the main compressor has a positive impact on the system, but the cycle efficiency/exergy efficiency and its slope gradually decrease; ④the heat exchange temperature difference and flow resistance of the heat exchanger bring quantifiable burden to the system cycle: for every 10 K increase in the heat exchange temperature difference, the cycle efficiency decreases by 1.85% and exergy efficiency decreases by 2.70%; When the flow resistance increases by 1 MPa, the cycle efficiency decreases by 6.58% and exergy efficiency decreases by 10.22%. At last,this paper designs 5 physical reference schemes based on the analysis results and system exergy changes. Copyright ©2022 Nuclear Power Engineering. All rights reserved.
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页码：32 / 39
页数：7
相关论文
共 10 条
  • [1] 37, 3, (2016)
  • [2] FEHER E G., The supercritical thermodynamic power cycle, Energy Conversion, 8, 2, pp. 85-90, (1968)
  • [3] ANGELINO G., Carbon dioxide condensation cycles for power production, Journal of Engineering for Gas Turbines and Power, 90, 3, pp. 287-295, (1968)
  • [4] LADISLAV V, VACLAV D, ONDREJ B, Et al., Pinch point analysis of heat exchangers for supercritical carbon dioxide with gaseous admixtures in CCS systems, Energy Procedia, 86, pp. 489-499, (2016)
  • [5] DOSTAL V, HEJZLAR P, TODREAS N, Et al., Medium-power lead-alloy fast reactor balance-of-plant options, Nuclear Technology, 147, 3, pp. 388-405, (2004)
  • [6] DOSTAL V, HEJZLAR P, DRISCOLL M J., High-performance supercritical carbon dioxide cycle for next-generation nuclear reactors, Nuclear Technology, 154, 3, pp. 265-282, (2006)
  • [7] DOSTAL V, HEJZLAR P, DRISCOLL M J., The supercritical carbon dioxide power cycle: comparison to other advanced power cycles, Nuclear Technology, 154, 3, pp. 283-301, (2006)
  • [8] SARKAR J, BHATTACHARYYA S., Optimization of recompression S-CO<sub>2</sub> power cycle with reheating, Energy Conversion and Management, 50, 8, pp. 1939-1945, (2009)
  • [9] 40, 1, (2019)
  • [10] 36, 1, (2016)
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