Visualized investigation of the onset of flow boiling dynamic instabilities in a horizontal arranged tube under a high-temperature thermal storage boundary condition

A visualized experimental test rig of flow boiling in high temperature thermal storage module was presented. The effects of high-temperature sensible heat thermal storage boundary condition on the oscillation characteristics at the onset of dynamic instability were investigated in this work. The flo...

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Autores principales:	Liang Zhang, Chengyao Guan, Yuhan Liu, Zitao Yu
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Dynamic instability Solid sensible heat thermal storage Thermal storage boundary Two-phase flow pattern Electrical engineering. Electronics. Nuclear engineering TK1-9971
Acceso en línea:	https://doaj.org/article/d89fc779716446108aad6987c1109875
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spelling	oai:doaj.org-article:d89fc779716446108aad6987c11098752021-11-28T04:34:19ZVisualized investigation of the onset of flow boiling dynamic instabilities in a horizontal arranged tube under a high-temperature thermal storage boundary condition2352-484710.1016/j.egyr.2021.10.081https://doaj.org/article/d89fc779716446108aad6987c11098752021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2352484721011008https://doaj.org/toc/2352-4847A visualized experimental test rig of flow boiling in high temperature thermal storage module was presented. The effects of high-temperature sensible heat thermal storage boundary condition on the oscillation characteristics at the onset of dynamic instability were investigated in this work. The flow boiling tests were carried out in a 1.6-meter-long horizontal tube with an inner diameter of 16.0 mm, which was embedded in a sensible thermal storage module using solid graphite. A series of thermal storage temperatures (200–340 °C), inlet subcooling degrees (5–45 °C) and mass flow rates (0–593.5 kg/m2s) were applied. Based on the dimensionless stability map, an early onset of dynamic instability was observed in comparison with the traditional constant heat flux condition. Meanwhile, both the pressure drop oscillations (PDO) and density wave oscillations (DWO) were observed. Based on the development of flow pattern and heat transfer distribution characteristics, the regulation mechanisms of the high-temperature thermal storage boundary on the development of dynamic instability were analyzed. The results show that the characteristics of dynamic instability are highly related to the development of flow pattern. The thermal storage boundary has affected the development of flow pattern by determining the wall superheat. The comprehensive effects of superheat, subcooling degree and mass flux on the development of flow pattern were also interpreted.Liang ZhangChengyao GuanYuhan LiuZitao YuElsevierarticleDynamic instabilitySolid sensible heat thermal storageThermal storage boundaryTwo-phase flow patternElectrical engineering. Electronics. Nuclear engineeringTK1-9971ENEnergy Reports, Vol 7, Iss , Pp 8406-8420 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Dynamic instability Solid sensible heat thermal storage Thermal storage boundary Two-phase flow pattern Electrical engineering. Electronics. Nuclear engineering TK1-9971
spellingShingle	Dynamic instability Solid sensible heat thermal storage Thermal storage boundary Two-phase flow pattern Electrical engineering. Electronics. Nuclear engineering TK1-9971 Liang Zhang Chengyao Guan Yuhan Liu Zitao Yu Visualized investigation of the onset of flow boiling dynamic instabilities in a horizontal arranged tube under a high-temperature thermal storage boundary condition
description	A visualized experimental test rig of flow boiling in high temperature thermal storage module was presented. The effects of high-temperature sensible heat thermal storage boundary condition on the oscillation characteristics at the onset of dynamic instability were investigated in this work. The flow boiling tests were carried out in a 1.6-meter-long horizontal tube with an inner diameter of 16.0 mm, which was embedded in a sensible thermal storage module using solid graphite. A series of thermal storage temperatures (200–340 °C), inlet subcooling degrees (5–45 °C) and mass flow rates (0–593.5 kg/m2s) were applied. Based on the dimensionless stability map, an early onset of dynamic instability was observed in comparison with the traditional constant heat flux condition. Meanwhile, both the pressure drop oscillations (PDO) and density wave oscillations (DWO) were observed. Based on the development of flow pattern and heat transfer distribution characteristics, the regulation mechanisms of the high-temperature thermal storage boundary on the development of dynamic instability were analyzed. The results show that the characteristics of dynamic instability are highly related to the development of flow pattern. The thermal storage boundary has affected the development of flow pattern by determining the wall superheat. The comprehensive effects of superheat, subcooling degree and mass flux on the development of flow pattern were also interpreted.
format	article
author	Liang Zhang Chengyao Guan Yuhan Liu Zitao Yu
author_facet	Liang Zhang Chengyao Guan Yuhan Liu Zitao Yu
author_sort	Liang Zhang
title	Visualized investigation of the onset of flow boiling dynamic instabilities in a horizontal arranged tube under a high-temperature thermal storage boundary condition
title_short	Visualized investigation of the onset of flow boiling dynamic instabilities in a horizontal arranged tube under a high-temperature thermal storage boundary condition
title_full	Visualized investigation of the onset of flow boiling dynamic instabilities in a horizontal arranged tube under a high-temperature thermal storage boundary condition
title_fullStr	Visualized investigation of the onset of flow boiling dynamic instabilities in a horizontal arranged tube under a high-temperature thermal storage boundary condition
title_full_unstemmed	Visualized investigation of the onset of flow boiling dynamic instabilities in a horizontal arranged tube under a high-temperature thermal storage boundary condition
title_sort	visualized investigation of the onset of flow boiling dynamic instabilities in a horizontal arranged tube under a high-temperature thermal storage boundary condition
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/d89fc779716446108aad6987c1109875
work_keys_str_mv	AT liangzhang visualizedinvestigationoftheonsetofflowboilingdynamicinstabilitiesinahorizontalarrangedtubeunderahightemperaturethermalstorageboundarycondition AT chengyaoguan visualizedinvestigationoftheonsetofflowboilingdynamicinstabilitiesinahorizontalarrangedtubeunderahightemperaturethermalstorageboundarycondition AT yuhanliu visualizedinvestigationoftheonsetofflowboilingdynamicinstabilitiesinahorizontalarrangedtubeunderahightemperaturethermalstorageboundarycondition AT zitaoyu visualizedinvestigationoftheonsetofflowboilingdynamicinstabilitiesinahorizontalarrangedtubeunderahightemperaturethermalstorageboundarycondition
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Visualized investigation of the onset of flow boiling dynamic instabilities in a horizontal arranged tube under a high-temperature thermal storage boundary condition

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