Publication detail

An optimal design for hollow fiber heat exchanger: A combined numerical and experimental investigation

BOHÁČEK, J. RAUDENSKÝ, M. ASTROUSKI, I. KARIMI-SIBAKI, E.

English title

An optimal design for hollow fiber heat exchanger: A combined numerical and experimental investigation

Type

journal article in Web of Science

Language

en

Original abstract

Polymeric hollow-fiber heat exchangers are a sound alternative to metallic plate fin counterparts. Plastic heat exchangers weigh much less, have significantly larger surface area per unit volume, are corrosion/erosion resistant and electrically non-conductive, have a reduced ecological footprint, and are likely to be substantially cheaper. A good passive chilled beam type heat exchanger requires its heat transfer surfaces to be distributed in optimal positions so that the thermal performance is maximized. For that purpose, a Lattice-Boltzmann model was setup in the open-source code Palabos to calculate natural convection triggered around a chilled beam made of many parallel hollow fibers with cold water running inside. In the simulations, the horizontal and vertical pitches between fibers were varied to eventually find their dimensionless optima of 6.9 and 1.3, respectively, for the Rayleigh number of 2.3. The numerical results were validated in the experiment as well as in the well-established ANSYS FLUENT.

English abstract

Polymeric hollow-fiber heat exchangers are a sound alternative to metallic plate fin counterparts. Plastic heat exchangers weigh much less, have significantly larger surface area per unit volume, are corrosion/erosion resistant and electrically non-conductive, have a reduced ecological footprint, and are likely to be substantially cheaper. A good passive chilled beam type heat exchanger requires its heat transfer surfaces to be distributed in optimal positions so that the thermal performance is maximized. For that purpose, a Lattice-Boltzmann model was setup in the open-source code Palabos to calculate natural convection triggered around a chilled beam made of many parallel hollow fibers with cold water running inside. In the simulations, the horizontal and vertical pitches between fibers were varied to eventually find their dimensionless optima of 6.9 and 1.3, respectively, for the Rayleigh number of 2.3. The numerical results were validated in the experiment as well as in the well-established ANSYS FLUENT.

Keywords in English

Heat exchanger, Chilled beam, Natural convection, Hollow fiber, Optimization, Computational fluid dynamics

Released

08.04.2021

Publisher

Elsevir Ltd

ISSN

0360-5442

Volume

229

Number

120571

Pages from–to

1–14

Pages count

14

BIBTEX


@article{BUT171382,
  author="Jan {Boháček} and Petr {Dyntera} and Miroslav {Raudenský} and Ilja {Astrouski} and Ebrahim {Karimi-Sibaki},
  title="An optimal design for hollow fiber heat exchanger: A combined numerical and experimental investigation",
  year="2021",
  volume="229",
  number="120571",
  month="April",
  pages="1--14",
  publisher="Elsevir Ltd",
  issn="0360-5442"
}