Numerical computation for parallel plate thermoacoustic heat exchangers in standing wave oscillatory flow

A simplified computational method for studying the heat transfer characteristics of parallel plate thermoacoustic heat exchangers is presented. The model integrates the thermoacoustic equations of the standard linear theory into an energy balance-based numerical calculus scheme. Details of the time-...

Full description

Saved in:
Bibliographic Details
Published in:International journal of heat and mass transfer Vol. 54; no. 21; pp. 4518 - 4530
Main Author: Piccolo, A.
Format: Journal Article
Language:English
Published: Kidlington Elsevier Ltd 01.10.2011
Elsevier
Subjects:
Applied sciences
Cryogenics
Density distribution
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Finite differences
Heat
Heat exchanger
Heat exchangers
Heat transfer
Mass transfer
Mathematical analysis
Mathematical models
Parallel plates
Refrigerating engineering. Cryogenics. Food conservation
Sound
Thermoacoustics
Heat
Sound
Thermoacoustics
Heat exchanger
Finite differences
Oscillating flow
Numerical simulation
Thermoacoustic effect
Performance
Refrigeration
Modeling
Heat transfer
Finite difference method
Standing wave
Parallel plate
ISSN:0017-9310, 1879-2189
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A simplified computational method for studying the heat transfer characteristics of parallel plate thermoacoustic heat exchangers is presented. The model integrates the thermoacoustic equations of the standard linear theory into an energy balance-based numerical calculus scheme. Details of the time-averaged temperature and heat flux density distributions within a representative domain of the heat exchangers and adjoining stack are given. The effect of operation conditions and geometrical parameters on the heat exchanger performance is investigated and main conclusions relevant for HX design are drawn as far as fin length, fin spacing, blockage ratio, gas and secondary fluid-side heat transfer coefficients are concerned. Most relevant is that the fin length and spacing affect in conjunction the heat exchanger behavior and have to be simultaneously optimized to minimize thermal losses localized at the HX-stack junctions. Model predictions fit experimental data found in literature within 36% and 49% respectively at moderate and high acoustic Reynolds numbers.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0017-9310
1879-2189
DOI:10.1016/j.ijheatmasstransfer.2011.06.027