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Research Papers: Flows in Complex Systems

Calculation of Fluid Flow Distribution Inside a Compact Ceramic High Temperature Heat Exchanger and Chemical Decomposer

[+] Author and Article Information
Valery Ponyavin

Department of Mechanical Engineering, University of Nevada, Las Vegas, 4505 Maryland Parkway, Las Vegas, NV 89154-4027ponyavin@nscee.edu

Yitung Chen

Department of Mechanical Engineering, University of Nevada, Las Vegas, 4505 Maryland Parkway, Las Vegas, NV 89154-4027uuchen@nscee.edu

James Cutts

 Ceramatec, Inc., 2425 South 900 West, Salt Lake City, UT 84119jcutts@ceramatec.com

Merrill Wilson

 Ceramatec, Inc., 2425 South 900 West, Salt Lake City, UT 84119wilson@ceramatec.com

Anthony E. Hechanova

Harry Reid Center for Environmental Studies, University of Nevada, Las Vegas, 4505 Maryland Parkway, Las Vegas, NV 89154-4009hechanova@unlv.nevada.edu

J. Fluids Eng 130(6), 061104 (Jun 12, 2008) (8 pages) doi:10.1115/1.2911680 History: Received June 14, 2007; Revised December 12, 2007; Published June 12, 2008

Numerical analysis of flow distribution inside a compact ceramic high temperature heat exchanger and chemical decomposer (thereafter, heat exchanger), which will be used for hydrogen production, wherein the sulfur iodine thermochemical cycle is performed. To validate the numerical model, experimental investigation of the heat exchanger is accomplished. The study of the flow distribution in the base line design heat exchanger shows that the design has large-flow maldistribution and the reverse flow may occur at poor inlet and outlet manifold configurations. To enhance uniformity of the flow rate distribution among the heat exchanger internal channels, several improved designs of the heat exchanger manifolds and supply channels are proposed. The proposed designs have a sufficiently uniform flow rate distribution among the internal channels, with an appropriate pressure drop.

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Copyright © 2008 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Shell and plate heat exchanger

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Figure 2

Four different cases of the calculation domain

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Figure 3

Geometry and dimensions of the modified inlet manifold

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Figure 4

Comparison of test coupon geometry with heat exchanger assembly

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Figure 5

Plexiglas test coupon

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Figure 6

Calculation geometry and channel numbering for the test coupon model

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Figure 7

Pressures for the Re=870

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Figure 8

y-velocity distribution at the midsection of the channels, m/s

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Figure 9

Streamlines, colored by velocity magnitude, m/s

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Figure 10

Pressure distribution, Pa

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Figure 11

Dependence of the flow nonuniformity parameter from Re

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Figure 12

Overall pressure drop from Re

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