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Flow boiling heat transfer of HFC-134a inside Helically coiled tubes

Organized by School of Mechatronic Engineering (UniMAP) & co-organized by The Institution of Engineering Malaysia (IEM), 11th - 13th October 2009 at Batu Feringhi, Penang, Malaysia.

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Bibliographic Details
Main Authors: Akhavan-Behabadi, M. A., Aria, H., Shemirani, F.M.
Other Authors: akhavan@ut.ac.ir
Format: Working Paper
Language:English
Published: Universiti Malaysia Perlis 2009
Subjects:
Flow boiling
Heat transfer
Helically coiled tubes
R-134a
Heat > Transmission
Tubes > Fluid dynamics
Online Access:http://dspace.unimap.edu.my/xmlui/handle/123456789/7259
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spelling my.unimap-72592009-11-17T07:03:32Z Flow boiling heat transfer of HFC-134a inside Helically coiled tubes Akhavan-Behabadi, M. A. Aria, H. Shemirani, F.M. akhavan@ut.ac.ir Flow boiling Heat transfer Helically coiled tubes R-134a Heat -- Transmission Tubes -- Fluid dynamics Organized by School of Mechatronic Engineering (UniMAP) & co-organized by The Institution of Engineering Malaysia (IEM), 11th - 13th October 2009 at Batu Feringhi, Penang, Malaysia. The present study investigated the effect of coiling of a straight tube on heat transfer enhancement in an evaporator. For this purpose, straight and helically coiled concentric tube-in-tube heat exchangers with three different inclinations (horizontal, vertical and with 45º angle) were employed. The outer diameter of the coil was 305 mm and its pitch was 45 mm. Refrigerant HFC-134a flowing inside the inner tube was heated by the water flowing in the annulus. The ranges of refrigerant mass fluxes was between 112 and 152 kg/m2s and inlet vapor quality ranges varied from 10% to 80%. Analysis of the collected data indicated that, the heat transfer coefficient elevates by increasing the mass velocity and vapor quality in coiled tubes like the straight tubes. The flow boiling heat transfer coefficient increases when the coiled tube is used instead of a straight tube. The horizontal helically coiled tube was more effective than vertical and 45º inclined ones in enhancing the heat transfer coefficients. Also two different correlations were developed to predict the average boiling heat transfer coefficients of R-134a inside vertical and horizontal helically coiled tubes, respectively. 2009-11-13T01:24:15Z 2009-11-13T01:24:15Z 2009-10-11 Working Paper p.13D 1 - 13D 6 978-967-5415-07-4 http://hdl.handle.net/123456789/7259 en Proceedings of International Conference on Applications and Design in Mechanical Engineering 2009 (iCADME 2009) Universiti Malaysia Perlis
institution Universiti Malaysia Perlis
building UniMAP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Perlis
content_source UniMAP Library Digital Repository
url_provider http://dspace.unimap.edu.my/
language English
topic Flow boiling
Heat transfer
Helically coiled tubes
R-134a
Heat -- Transmission
Tubes -- Fluid dynamics
spellingShingle Flow boiling
Heat transfer
Helically coiled tubes
R-134a
Heat -- Transmission
Tubes -- Fluid dynamics
Akhavan-Behabadi, M. A.
Aria, H.
Shemirani, F.M.
Flow boiling heat transfer of HFC-134a inside Helically coiled tubes
description Organized by School of Mechatronic Engineering (UniMAP) & co-organized by The Institution of Engineering Malaysia (IEM), 11th - 13th October 2009 at Batu Feringhi, Penang, Malaysia.
author2 akhavan@ut.ac.ir
author_facet akhavan@ut.ac.ir
Akhavan-Behabadi, M. A.
Aria, H.
Shemirani, F.M.
format Working Paper
author Akhavan-Behabadi, M. A.
Aria, H.
Shemirani, F.M.
author_sort Akhavan-Behabadi, M. A.
title Flow boiling heat transfer of HFC-134a inside Helically coiled tubes
title_short Flow boiling heat transfer of HFC-134a inside Helically coiled tubes
title_full Flow boiling heat transfer of HFC-134a inside Helically coiled tubes
title_fullStr Flow boiling heat transfer of HFC-134a inside Helically coiled tubes
title_full_unstemmed Flow boiling heat transfer of HFC-134a inside Helically coiled tubes
title_sort flow boiling heat transfer of hfc-134a inside helically coiled tubes
publisher Universiti Malaysia Perlis
publishDate 2009
url http://dspace.unimap.edu.my/xmlui/handle/123456789/7259
_version_ 1643788772555358208
score 13.222552

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