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Research Papers

Experimental Performance Evaluation of Tubular Manifold Heat Exchanger

[+] Author and Article Information
Muhammad Ansab Ali

Department of Mechanical Engineering,
Khalifa University of Science and Technology,
Sas Al Nakhl Campus,
P.O. Box 2533,
Abu Dhabi, United Arab Emirates
e-mail: muaali@pi.ac.ae

Tariq S. Khan

Mem. ASME
Department of Mechanical Engineering,
Higher Colleges of Technology,
Dubai Men's Campus,
P.O. Box 15825,
Dubai, United Arab Emirates
e-mail: tariq.saeedk@gmail.com

Ebrahim Al Hajri

Mem. ASME
Department of Mechanical Engineering,
Khalifa University of Science and Technology,
Room 3008A, Sas Al Nakhl Campus,
P.O. Box 2533,
Abu Dhabi, United Arab Emirates
e-mail: ebrahim.alhajri@ku.ac.ae

Fadi Khasawneh

ADNOC,
Abu Dhabi National Oil Company,
Abu Dhabi, United Arab Emirates
e-mail: fkhasawneh@adnoc.ae

1Corresponding author.

Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF THERMAL SCIENCE AND ENGINEERING APPLICATIONS. Manuscript received May 17, 2018; final manuscript received August 12, 2018; published online October 15, 2018. Assoc. Editor: Amir Jokar.

J. Thermal Sci. Eng. Appl 11(1), 011012 (Oct 15, 2018) (11 pages) Paper No: TSEA-18-1249; doi: 10.1115/1.4041346 History: Received May 17, 2018; Revised August 12, 2018

The present work demonstrates the use of manifold microchannel technology in conjunction with conventional macrogeometries to achieve superior performance compared to traditional heat exchangers. A novel tubular manifold heat exchanger is designed using three-dimensional (3D) printed manifold and conventional double enhanced tube. The experiments are performed using water as the working fluid and the manifold side heat transfer coefficient up to 9538 Wm−2K−1 with a low flowrate of 4.25 lpm is achieved with as low pressure drop as 323 Pa. A comparison with respect to thermal hydraulic performance of the results with a plate heat exchanger shows clear advantage of the proposed exchanger. Overall, microscale heat transfer characteristics are obtained by using relatively simple and economical fabrication techniques.

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Figures

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Fig. 1

Components of the tubular manifold exchanger (a) enhanced tube (b) manifold (c) demonstration of flow path through individual microchannel

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Fig. 2

Computer aided design drawing of tubular manifold heat exchanger

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Fig. 3

Photograph of manifold test section ((a)-manifold with enhanced tube, (b)-manifold test section)

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Fig. 4

Experimental setup schematic

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Fig. 5

Photograph of experimental test section

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Fig. 6

Comparison of HEX-A (smooth tube) test section results with correlations in literature [42,43]

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Fig. 7

Tube side Nusselt number of HEX-B (enhanced tube) and HEX-A (smooth tube)

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Fig. 8

Tube side friction factor of HEX-B (enhanced tube) and HEX-A (smooth tube)

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Fig. 9

Manifold side heat transfer coefficient (HC-horizontal counter flow, HP-horizontal parallel flow and VP-vertical parallel flow) of HEX-C

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Fig. 10

Manifold side pressure drop versus flowrate (HC-horizontal counter flow, HP-horizontal parallel flow and VP-vertical parallel flow) of HEX-C

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Fig. 11

Comparison of HEX-C (tubular manifold exchanger) with empirical correlations in literature

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