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Experimental study of inverted annular film boiling in a vertical tube cooled by R-134a
► Heat transfer coefficient vs. quality curve can be divided into four regions depending on the flow regime. ► Film boiling heat transfer coefficient increases with increasing pressure and mass flux. ► Heat flux has weak effect on film boiling heat transfer coefficient. ► Inlet subcooling affects he...
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| Published in: | International journal of multiphase flow 2011, Vol.37 (1), p.67-75 |
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| Format: | Article |
| Language: | English |
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| cited_by | cdi_FETCH-LOGICAL-c464t-4a3523b1403bbef3c093b481127a4a3e65ec0575633364b9f417cb1bc19f01d13 |
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| cites | cdi_FETCH-LOGICAL-c464t-4a3523b1403bbef3c093b481127a4a3e65ec0575633364b9f417cb1bc19f01d13 |
| container_end_page | 75 |
| container_issue | 1 |
| container_start_page | 67 |
| container_title | International journal of multiphase flow |
| container_volume | 37 |
| creator | Nakla, Meamer El Groeneveld, D.C. Cheng, S.C. |
| description | ► Heat transfer coefficient vs. quality curve can be divided into four regions depending on the flow regime. ► Film boiling heat transfer coefficient increases with increasing pressure and mass flux. ► Heat flux has weak effect on film boiling heat transfer coefficient. ► Inlet subcooling affects heat transfer coefficient just downstream of CHF location.
An experimental investigation of inverted annular film boiling heat transfer has been performed for vertical up-flow in a round tube. The experiments used R-134a coolant and covered a pressure range of 640–2390
kPa (water equivalent range: 4000–14,000
kPa) and a mass flux range of 500–4000
kg
m
−2
s
−1 (water equivalent range: 700–5700
kg
m
−2
s
−1). The inlet qualities of the tests ranged from −0.75 to −0.03. The hot-patch technique was used to obtain the subcooled film boiling measurements. It was found that the heat transfer vs. quality curve can be divided into four different regions, each characterized by a different mechanisms and trends. These regions are dependent on pressure, mass flux and local quality. A detailed examination of the parametric trends of the heat transfer coefficient with respect to mass flux, inlet quality, heat flux and pressure was performed; reasonably good agreement between observed trends and those reported in the literature were noted. |
| doi_str_mv | 10.1016/j.ijmultiphaseflow.2010.08.006 |
| format | article |
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An experimental investigation of inverted annular film boiling heat transfer has been performed for vertical up-flow in a round tube. The experiments used R-134a coolant and covered a pressure range of 640–2390
kPa (water equivalent range: 4000–14,000
kPa) and a mass flux range of 500–4000
kg
m
−2
s
−1 (water equivalent range: 700–5700
kg
m
−2
s
−1). The inlet qualities of the tests ranged from −0.75 to −0.03. The hot-patch technique was used to obtain the subcooled film boiling measurements. It was found that the heat transfer vs. quality curve can be divided into four different regions, each characterized by a different mechanisms and trends. These regions are dependent on pressure, mass flux and local quality. A detailed examination of the parametric trends of the heat transfer coefficient with respect to mass flux, inlet quality, heat flux and pressure was performed; reasonably good agreement between observed trends and those reported in the literature were noted.</description><identifier>ISSN: 0301-9322</identifier><identifier>EISSN: 1879-3533</identifier><identifier>DOI: 10.1016/j.ijmultiphaseflow.2010.08.006</identifier><identifier>CODEN: IJMFBP</identifier><language>eng</language><publisher>Kidlington: Elsevier Ltd</publisher><subject>Annular ; Applied sciences ; Energy ; Energy. Thermal use of fuels ; Equivalence ; Exact sciences and technology ; Film boiling ; Flux ; Heat transfer ; Hot-patch techniques ; Inlets ; Inverted annular film boiling ; Theoretical studies. Data and constants. Metering ; Trends ; Tubes</subject><ispartof>International journal of multiphase flow, 2011, Vol.37 (1), p.67-75</ispartof><rights>2010 Elsevier Ltd</rights><rights>2015 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c464t-4a3523b1403bbef3c093b481127a4a3e65ec0575633364b9f417cb1bc19f01d13</citedby><cites>FETCH-LOGICAL-c464t-4a3523b1403bbef3c093b481127a4a3e65ec0575633364b9f417cb1bc19f01d13</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>315,786,790,4043,27956,27957,27958</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=23432122$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Nakla, Meamer El</creatorcontrib><creatorcontrib>Groeneveld, D.C.</creatorcontrib><creatorcontrib>Cheng, S.C.</creatorcontrib><title>Experimental study of inverted annular film boiling in a vertical tube cooled by R-134a</title><title>International journal of multiphase flow</title><description>► Heat transfer coefficient vs. quality curve can be divided into four regions depending on the flow regime. ► Film boiling heat transfer coefficient increases with increasing pressure and mass flux. ► Heat flux has weak effect on film boiling heat transfer coefficient. ► Inlet subcooling affects heat transfer coefficient just downstream of CHF location.
An experimental investigation of inverted annular film boiling heat transfer has been performed for vertical up-flow in a round tube. The experiments used R-134a coolant and covered a pressure range of 640–2390
kPa (water equivalent range: 4000–14,000
kPa) and a mass flux range of 500–4000
kg
m
−2
s
−1 (water equivalent range: 700–5700
kg
m
−2
s
−1). The inlet qualities of the tests ranged from −0.75 to −0.03. The hot-patch technique was used to obtain the subcooled film boiling measurements. It was found that the heat transfer vs. quality curve can be divided into four different regions, each characterized by a different mechanisms and trends. These regions are dependent on pressure, mass flux and local quality. A detailed examination of the parametric trends of the heat transfer coefficient with respect to mass flux, inlet quality, heat flux and pressure was performed; reasonably good agreement between observed trends and those reported in the literature were noted.</description><subject>Annular</subject><subject>Applied sciences</subject><subject>Energy</subject><subject>Energy. Thermal use of fuels</subject><subject>Equivalence</subject><subject>Exact sciences and technology</subject><subject>Film boiling</subject><subject>Flux</subject><subject>Heat transfer</subject><subject>Hot-patch techniques</subject><subject>Inlets</subject><subject>Inverted annular film boiling</subject><subject>Theoretical studies. Data and constants. Metering</subject><subject>Trends</subject><subject>Tubes</subject><issn>0301-9322</issn><issn>1879-3533</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><recordid>eNqNkEFv1DAUhC3USmxb_oMvwCmLn5-TTS5IqCptpUpICMTRsp1n8Mobb-2ksP8er7bqgRMnH-Z7M55h7B2INQjoPmzXYbtb4hz2v0whH9PvtRRVFP1aiO4VW0G_GRpsEc_YSqCAZkApX7OLUrZCiHajcMV-3PzZUw47mmYTeZmX8cCT52F6ojzTyM00LdFk7kPccZtCDNPPqnLDj0Bw9WheLHGXUqy4PfCvDaAyV-zcm1jozfN7yb5_vvl2fdc8fLm9v_700DjVqblRBluJFpRAa8mjEwNa1QPIjakadS25-tO2Q8RO2cEr2DgL1sHgBYyAl-z9yXef0-NCZda7UBzFaCZKS9E9ggTZ920lP55Il1Mpmbze194mHzQIfRxUb_W_g-rjoFr0ug5aDd4-R5lSe_tsJhfKi4tEhTVKVu7uxFHt_RQo6-ICTY7GkMnNekzhfyP_AtU2leo</recordid><startdate>2011</startdate><enddate>2011</enddate><creator>Nakla, Meamer El</creator><creator>Groeneveld, D.C.</creator><creator>Cheng, S.C.</creator><general>Elsevier Ltd</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TB</scope><scope>8FD</scope><scope>FR3</scope><scope>H8D</scope><scope>KR7</scope><scope>L7M</scope></search><sort><creationdate>2011</creationdate><title>Experimental study of inverted annular film boiling in a vertical tube cooled by R-134a</title><author>Nakla, Meamer El ; Groeneveld, D.C. ; Cheng, S.C.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c464t-4a3523b1403bbef3c093b481127a4a3e65ec0575633364b9f417cb1bc19f01d13</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>Annular</topic><topic>Applied sciences</topic><topic>Energy</topic><topic>Energy. Thermal use of fuels</topic><topic>Equivalence</topic><topic>Exact sciences and technology</topic><topic>Film boiling</topic><topic>Flux</topic><topic>Heat transfer</topic><topic>Hot-patch techniques</topic><topic>Inlets</topic><topic>Inverted annular film boiling</topic><topic>Theoretical studies. Data and constants. Metering</topic><topic>Trends</topic><topic>Tubes</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Nakla, Meamer El</creatorcontrib><creatorcontrib>Groeneveld, D.C.</creatorcontrib><creatorcontrib>Cheng, S.C.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Civil Engineering Abstracts</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>International journal of multiphase flow</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Nakla, Meamer El</au><au>Groeneveld, D.C.</au><au>Cheng, S.C.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Experimental study of inverted annular film boiling in a vertical tube cooled by R-134a</atitle><jtitle>International journal of multiphase flow</jtitle><date>2011</date><risdate>2011</risdate><volume>37</volume><issue>1</issue><spage>67</spage><epage>75</epage><pages>67-75</pages><issn>0301-9322</issn><eissn>1879-3533</eissn><coden>IJMFBP</coden><notes>ObjectType-Article-2</notes><notes>SourceType-Scholarly Journals-1</notes><notes>ObjectType-Feature-1</notes><notes>content type line 23</notes><abstract>► Heat transfer coefficient vs. quality curve can be divided into four regions depending on the flow regime. ► Film boiling heat transfer coefficient increases with increasing pressure and mass flux. ► Heat flux has weak effect on film boiling heat transfer coefficient. ► Inlet subcooling affects heat transfer coefficient just downstream of CHF location.
An experimental investigation of inverted annular film boiling heat transfer has been performed for vertical up-flow in a round tube. The experiments used R-134a coolant and covered a pressure range of 640–2390
kPa (water equivalent range: 4000–14,000
kPa) and a mass flux range of 500–4000
kg
m
−2
s
−1 (water equivalent range: 700–5700
kg
m
−2
s
−1). The inlet qualities of the tests ranged from −0.75 to −0.03. The hot-patch technique was used to obtain the subcooled film boiling measurements. It was found that the heat transfer vs. quality curve can be divided into four different regions, each characterized by a different mechanisms and trends. These regions are dependent on pressure, mass flux and local quality. A detailed examination of the parametric trends of the heat transfer coefficient with respect to mass flux, inlet quality, heat flux and pressure was performed; reasonably good agreement between observed trends and those reported in the literature were noted.</abstract><cop>Kidlington</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.ijmultiphaseflow.2010.08.006</doi><tpages>9</tpages></addata></record> |
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| identifier | ISSN: 0301-9322 |
| ispartof | International journal of multiphase flow, 2011, Vol.37 (1), p.67-75 |
| issn | 0301-9322 1879-3533 |
| language | eng |
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| source | ScienceDirect Freedom Collection |
| subjects | Annular Applied sciences Energy Energy. Thermal use of fuels Equivalence Exact sciences and technology Film boiling Flux Heat transfer Hot-patch techniques Inlets Inverted annular film boiling Theoretical studies. Data and constants. Metering Trends Tubes |
| title | Experimental study of inverted annular film boiling in a vertical tube cooled by R-134a |
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