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A performance analysis of porous graphite foam heat exchangers in vehicles

Lin, Wamei LU ; Sundén, Bengt LU and Yuan, Jinliang LU (2013) In Applied Thermal Engineering 50(1). p.1201-1210
Abstract
Due to the increasing cooling power and space limitation in vehicles, a new compact heat exchanger graphite foam heat exchanger is proposed for vehicle cooling application. The graphite foam has high thermal conductivity (the effective thermal conductivity is 40-150 W/m K) and low density (0.2-0.6 g/cm(3)), but it has high flow resistance which is a problem in heat exchanger applications. In order to find a graphite foam heat exchanger with low flow resistance, four different configurations (baffle, pin-finned, corrugated, and wavy corrugated) of graphite foam fins are analyzed in terms of thermal performance and pressure drop by using a computational fluid dynamics approach. The simulation results show that the wavy corrugated foam... (More)
Due to the increasing cooling power and space limitation in vehicles, a new compact heat exchanger graphite foam heat exchanger is proposed for vehicle cooling application. The graphite foam has high thermal conductivity (the effective thermal conductivity is 40-150 W/m K) and low density (0.2-0.6 g/cm(3)), but it has high flow resistance which is a problem in heat exchanger applications. In order to find a graphite foam heat exchanger with low flow resistance, four different configurations (baffle, pin-finned, corrugated, and wavy corrugated) of graphite foam fins are analyzed in terms of thermal performance and pressure drop by using a computational fluid dynamics approach. The simulation results show that the wavy corrugated foam presents high thermal performance and low pressure drop. Moreover, a comparative study between the wavy corrugated foam heat exchanger and a conventional aluminum louver fin heat exchanger is carried out to evaluate the performance of graphite foam heat exchangers in terms of coefficient of performance (removed heat/air pumping loss), power density (removed heat/mass of heat exchangers), and compactness factor (removed heat/volume of heat exchangers). Finally, this paper concludes that graphite foam heat exchangers should be further developed in vehicles, and presents several recommendations for how such development can be promoted. (C) 2012 Elsevier Ltd. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Graphite foam, Heat exchanger, Vehicle, Thermal performance, Pressure, drop
in
Applied Thermal Engineering
volume
50
issue
1
pages
1201 - 1210
publisher
Elsevier
external identifiers
  • wos:000314191100134
  • scopus:84867413178
ISSN
1359-4311
DOI
10.1016/j.applthermaleng.2012.08.047
language
English
LU publication?
yes
id
8a5c3903-8656-4772-9f17-d9931112c191 (old id 3590748)
date added to LUP
2013-03-19 14:43:36
date last changed
2019-05-14 01:04:44
@article{8a5c3903-8656-4772-9f17-d9931112c191,
  abstract     = {Due to the increasing cooling power and space limitation in vehicles, a new compact heat exchanger graphite foam heat exchanger is proposed for vehicle cooling application. The graphite foam has high thermal conductivity (the effective thermal conductivity is 40-150 W/m K) and low density (0.2-0.6 g/cm(3)), but it has high flow resistance which is a problem in heat exchanger applications. In order to find a graphite foam heat exchanger with low flow resistance, four different configurations (baffle, pin-finned, corrugated, and wavy corrugated) of graphite foam fins are analyzed in terms of thermal performance and pressure drop by using a computational fluid dynamics approach. The simulation results show that the wavy corrugated foam presents high thermal performance and low pressure drop. Moreover, a comparative study between the wavy corrugated foam heat exchanger and a conventional aluminum louver fin heat exchanger is carried out to evaluate the performance of graphite foam heat exchangers in terms of coefficient of performance (removed heat/air pumping loss), power density (removed heat/mass of heat exchangers), and compactness factor (removed heat/volume of heat exchangers). Finally, this paper concludes that graphite foam heat exchangers should be further developed in vehicles, and presents several recommendations for how such development can be promoted. (C) 2012 Elsevier Ltd. All rights reserved.},
  author       = {Lin, Wamei and Sundén, Bengt and Yuan, Jinliang},
  issn         = {1359-4311},
  keyword      = {Graphite foam,Heat exchanger,Vehicle,Thermal performance,Pressure,drop},
  language     = {eng},
  number       = {1},
  pages        = {1201--1210},
  publisher    = {Elsevier},
  series       = {Applied Thermal Engineering},
  title        = {A performance analysis of porous graphite foam heat exchangers in vehicles},
  url          = {http://dx.doi.org/10.1016/j.applthermaleng.2012.08.047},
  volume       = {50},
  year         = {2013},
}