Experimental Investigation on Heat Transfer of Supercritical Water Flowing in the Subchannel with Grid Spacer in Supercritical Water-Cooled Reactor
Experimental investigations on the heat transfer performance of supercritical water flowing in the subchannel of supercritical water-cooled reactor (SCWR) simulated by a triangular channel were conducted at pressures of 23−28 MPa, mass flow rates of 700−1300 kg·m<sup&...
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doaj-4175e8f5b5534fa7a37054505b0e60252020-11-25T02:56:03ZengMDPI AGEnergies1996-10732020-02-01135101610.3390/en13051016en13051016Experimental Investigation on Heat Transfer of Supercritical Water Flowing in the Subchannel with Grid Spacer in Supercritical Water-Cooled ReactorWeishu Wang0Lingwei Guo1Ge Zhu2Xiaojing Zhu3Qincheng Bi4School of Electric Power, North China University of Water Resources and Electric Power, Zhengzhou 450000, ChinaSchool of Electric Power, North China University of Water Resources and Electric Power, Zhengzhou 450000, ChinaSchool of Electric Power, North China University of Water Resources and Electric Power, Zhengzhou 450000, ChinaSchool of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, ChinaState Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, ChinaExperimental investigations on the heat transfer performance of supercritical water flowing in the subchannel of supercritical water-cooled reactor (SCWR) simulated by a triangular channel were conducted at pressures of 23−28 MPa, mass flow rates of 700−1300 kg·m<sup>−2</sup>·s<sup>−1</sup>, and inner wall surface heat fluxes of 200−600 kW·m<sup>−2</sup>. An 8 mm diameter fuel rod with a 1.4 pitch to diameter ratio was used. The effects of pressure, mass flow rate, and heat flux on the heat transfer performance under the resistance of a standard grid spacer were analyzed. Experimental results showed the significant positive influence of the grid spacer on the supercritical water in the subchannel. Moreover, in the presence of the grid spacer, the parameters influenced the heat transfer with different degrees of strengthening reaction. In view of the phenomenon in the tests, the rule of the supercritical heat transfer was further revealed by the comparison between empirical formulas and experimental data. This paper mainly studied the positioning grid function and the fluid flow characteristics downstream of the subchannel under the influence of the standard grid spacer and the impact mechanism of each parameter on the whole heat transfer process coefficient.https://www.mdpi.com/1996-1073/13/5/1016supercritical water reactorgrid spacertriangular channelheat transfer performance |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Weishu Wang Lingwei Guo Ge Zhu Xiaojing Zhu Qincheng Bi |
spellingShingle |
Weishu Wang Lingwei Guo Ge Zhu Xiaojing Zhu Qincheng Bi Experimental Investigation on Heat Transfer of Supercritical Water Flowing in the Subchannel with Grid Spacer in Supercritical Water-Cooled Reactor Energies supercritical water reactor grid spacer triangular channel heat transfer performance |
author_facet |
Weishu Wang Lingwei Guo Ge Zhu Xiaojing Zhu Qincheng Bi |
author_sort |
Weishu Wang |
title |
Experimental Investigation on Heat Transfer of Supercritical Water Flowing in the Subchannel with Grid Spacer in Supercritical Water-Cooled Reactor |
title_short |
Experimental Investigation on Heat Transfer of Supercritical Water Flowing in the Subchannel with Grid Spacer in Supercritical Water-Cooled Reactor |
title_full |
Experimental Investigation on Heat Transfer of Supercritical Water Flowing in the Subchannel with Grid Spacer in Supercritical Water-Cooled Reactor |
title_fullStr |
Experimental Investigation on Heat Transfer of Supercritical Water Flowing in the Subchannel with Grid Spacer in Supercritical Water-Cooled Reactor |
title_full_unstemmed |
Experimental Investigation on Heat Transfer of Supercritical Water Flowing in the Subchannel with Grid Spacer in Supercritical Water-Cooled Reactor |
title_sort |
experimental investigation on heat transfer of supercritical water flowing in the subchannel with grid spacer in supercritical water-cooled reactor |
publisher |
MDPI AG |
series |
Energies |
issn |
1996-1073 |
publishDate |
2020-02-01 |
description |
Experimental investigations on the heat transfer performance of supercritical water flowing in the subchannel of supercritical water-cooled reactor (SCWR) simulated by a triangular channel were conducted at pressures of 23−28 MPa, mass flow rates of 700−1300 kg·m<sup>−2</sup>·s<sup>−1</sup>, and inner wall surface heat fluxes of 200−600 kW·m<sup>−2</sup>. An 8 mm diameter fuel rod with a 1.4 pitch to diameter ratio was used. The effects of pressure, mass flow rate, and heat flux on the heat transfer performance under the resistance of a standard grid spacer were analyzed. Experimental results showed the significant positive influence of the grid spacer on the supercritical water in the subchannel. Moreover, in the presence of the grid spacer, the parameters influenced the heat transfer with different degrees of strengthening reaction. In view of the phenomenon in the tests, the rule of the supercritical heat transfer was further revealed by the comparison between empirical formulas and experimental data. This paper mainly studied the positioning grid function and the fluid flow characteristics downstream of the subchannel under the influence of the standard grid spacer and the impact mechanism of each parameter on the whole heat transfer process coefficient. |
topic |
supercritical water reactor grid spacer triangular channel heat transfer performance |
url |
https://www.mdpi.com/1996-1073/13/5/1016 |
work_keys_str_mv |
AT weishuwang experimentalinvestigationonheattransferofsupercriticalwaterflowinginthesubchannelwithgridspacerinsupercriticalwatercooledreactor AT lingweiguo experimentalinvestigationonheattransferofsupercriticalwaterflowinginthesubchannelwithgridspacerinsupercriticalwatercooledreactor AT gezhu experimentalinvestigationonheattransferofsupercriticalwaterflowinginthesubchannelwithgridspacerinsupercriticalwatercooledreactor AT xiaojingzhu experimentalinvestigationonheattransferofsupercriticalwaterflowinginthesubchannelwithgridspacerinsupercriticalwatercooledreactor AT qinchengbi experimentalinvestigationonheattransferofsupercriticalwaterflowinginthesubchannelwithgridspacerinsupercriticalwatercooledreactor |
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1724714431044124672 |