Evaporation heat transfer of R-134a inside a microfin tube with different tube inclinations
An experimental investigation has been carried out to study the heat transfer characteristics during evaporation of R-134a inside a single helical microfin tube. The microfin tube has been provided with different tube inclination angles of the direction of fluid flow from horizontal, α. The experime...
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| Veröffentlicht in: | Experimental thermal and fluid science 2011-09, Vol.35 (6), p.996-1001 |
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| creator | Akhavan-Behabadi, M.A. Mohseni, S.G. Razavinasab, S.M. |
| description | An experimental investigation has been carried out to study the heat transfer characteristics during evaporation of R-134a inside a single helical microfin tube. The microfin tube has been provided with different tube inclination angles of the direction of fluid flow from horizontal,
α. The experiments were performed for seven different tube inclinations,
α, in a range of −90° to +90° and four mass velocities of 53, 80, 107 and 136
kg/m
2
s for each tube inclination angle during evaporation of R-134a. The results demonstrate that the tube inclination angle,
α, affects the boiling heat-transfer coefficient in a significant manner. For all refrigerant mass velocities, the best performing tube is that having inclination angle of
α
=
+90°. The effect of tube inclination angle,
α, on heat-transfer coefficient, h, is more prominent at low vapor quality and mass velocity. An empirical correlation has also been developed to predict the heat-transfer coefficient during flow boiling inside a microfin tube with different tube inclinations. |
| doi_str_mv | 10.1016/j.expthermflusci.2011.01.020 |
| format | Article |
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α. The experiments were performed for seven different tube inclinations,
α, in a range of −90° to +90° and four mass velocities of 53, 80, 107 and 136
kg/m
2
s for each tube inclination angle during evaporation of R-134a. The results demonstrate that the tube inclination angle,
α, affects the boiling heat-transfer coefficient in a significant manner. For all refrigerant mass velocities, the best performing tube is that having inclination angle of
α
=
+90°. The effect of tube inclination angle,
α, on heat-transfer coefficient, h, is more prominent at low vapor quality and mass velocity. An empirical correlation has also been developed to predict the heat-transfer coefficient during flow boiling inside a microfin tube with different tube inclinations.</description><identifier>ISSN: 0894-1777</identifier><identifier>EISSN: 1879-2286</identifier><identifier>DOI: 10.1016/j.expthermflusci.2011.01.020</identifier><language>eng</language><publisher>Amsterdam: Elsevier Inc</publisher><subject>Air conditioning. Ventilation ; Applied sciences ; Coefficients ; Energy ; Energy. Thermal use of fuels ; Evaporation ; Exact sciences and technology ; Fluid dynamics ; Fluid flow ; Heat transfer ; Heating, air conditioning and ventilation ; Inclination ; Inclination angle ; Microfin tube ; R-134a ; Refrigerants ; Refrigerating engineering ; Refrigerating engineering. Cryogenics. Food conservation ; Tubes</subject><ispartof>Experimental thermal and fluid science, 2011-09, Vol.35 (6), p.996-1001</ispartof><rights>2011 Elsevier Inc.</rights><rights>2015 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c425t-dba167db8df7b34096cd096c616413c6e1ccca7b6b2098889eb9c20d0ca63c233</citedby><cites>FETCH-LOGICAL-c425t-dba167db8df7b34096cd096c616413c6e1ccca7b6b2098889eb9c20d0ca63c233</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0894177711000318$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65306</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=24250267$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Akhavan-Behabadi, M.A.</creatorcontrib><creatorcontrib>Mohseni, S.G.</creatorcontrib><creatorcontrib>Razavinasab, S.M.</creatorcontrib><title>Evaporation heat transfer of R-134a inside a microfin tube with different tube inclinations</title><title>Experimental thermal and fluid science</title><description>An experimental investigation has been carried out to study the heat transfer characteristics during evaporation of R-134a inside a single helical microfin tube. The microfin tube has been provided with different tube inclination angles of the direction of fluid flow from horizontal,
α. The experiments were performed for seven different tube inclinations,
α, in a range of −90° to +90° and four mass velocities of 53, 80, 107 and 136
kg/m
2
s for each tube inclination angle during evaporation of R-134a. The results demonstrate that the tube inclination angle,
α, affects the boiling heat-transfer coefficient in a significant manner. For all refrigerant mass velocities, the best performing tube is that having inclination angle of
α
=
+90°. The effect of tube inclination angle,
α, on heat-transfer coefficient, h, is more prominent at low vapor quality and mass velocity. An empirical correlation has also been developed to predict the heat-transfer coefficient during flow boiling inside a microfin tube with different tube inclinations.</description><subject>Air conditioning. Ventilation</subject><subject>Applied sciences</subject><subject>Coefficients</subject><subject>Energy</subject><subject>Energy. Thermal use of fuels</subject><subject>Evaporation</subject><subject>Exact sciences and technology</subject><subject>Fluid dynamics</subject><subject>Fluid flow</subject><subject>Heat transfer</subject><subject>Heating, air conditioning and ventilation</subject><subject>Inclination</subject><subject>Inclination angle</subject><subject>Microfin tube</subject><subject>R-134a</subject><subject>Refrigerants</subject><subject>Refrigerating engineering</subject><subject>Refrigerating engineering. Cryogenics. 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Ventilation</topic><topic>Applied sciences</topic><topic>Coefficients</topic><topic>Energy</topic><topic>Energy. Thermal use of fuels</topic><topic>Evaporation</topic><topic>Exact sciences and technology</topic><topic>Fluid dynamics</topic><topic>Fluid flow</topic><topic>Heat transfer</topic><topic>Heating, air conditioning and ventilation</topic><topic>Inclination</topic><topic>Inclination angle</topic><topic>Microfin tube</topic><topic>R-134a</topic><topic>Refrigerants</topic><topic>Refrigerating engineering</topic><topic>Refrigerating engineering. Cryogenics. Food conservation</topic><topic>Tubes</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Akhavan-Behabadi, M.A.</creatorcontrib><creatorcontrib>Mohseni, S.G.</creatorcontrib><creatorcontrib>Razavinasab, S.M.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Solid State and Superconductivity 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><collection>Aqualine</collection><collection>Water Resources Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><jtitle>Experimental thermal and fluid science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Akhavan-Behabadi, M.A.</au><au>Mohseni, S.G.</au><au>Razavinasab, S.M.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Evaporation heat transfer of R-134a inside a microfin tube with different tube inclinations</atitle><jtitle>Experimental thermal and fluid science</jtitle><date>2011-09-01</date><risdate>2011</risdate><volume>35</volume><issue>6</issue><spage>996</spage><epage>1001</epage><pages>996-1001</pages><issn>0894-1777</issn><eissn>1879-2286</eissn><abstract>An experimental investigation has been carried out to study the heat transfer characteristics during evaporation of R-134a inside a single helical microfin tube. The microfin tube has been provided with different tube inclination angles of the direction of fluid flow from horizontal,
α. The experiments were performed for seven different tube inclinations,
α, in a range of −90° to +90° and four mass velocities of 53, 80, 107 and 136
kg/m
2
s for each tube inclination angle during evaporation of R-134a. The results demonstrate that the tube inclination angle,
α, affects the boiling heat-transfer coefficient in a significant manner. For all refrigerant mass velocities, the best performing tube is that having inclination angle of
α
=
+90°. The effect of tube inclination angle,
α, on heat-transfer coefficient, h, is more prominent at low vapor quality and mass velocity. An empirical correlation has also been developed to predict the heat-transfer coefficient during flow boiling inside a microfin tube with different tube inclinations.</abstract><cop>Amsterdam</cop><pub>Elsevier Inc</pub><doi>10.1016/j.expthermflusci.2011.01.020</doi><tpages>6</tpages></addata></record> |
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| source | Elsevier ScienceDirect Journals |
| subjects | Air conditioning. Ventilation Applied sciences Coefficients Energy Energy. Thermal use of fuels Evaporation Exact sciences and technology Fluid dynamics Fluid flow Heat transfer Heating, air conditioning and ventilation Inclination Inclination angle Microfin tube R-134a Refrigerants Refrigerating engineering Refrigerating engineering. Cryogenics. Food conservation Tubes |
| title | Evaporation heat transfer of R-134a inside a microfin tube with different tube inclinations |
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