Applying hot-wire anemometry to directly measure the water balance in a proton exchange membrane fuel cell: - Part 2: Experimental

Saher Al Shakhshir, Søren Juhl Andreasen, Torsten Berning

Research output: Contribution to journalJournal articleResearchpeer-review

1 Citation (Scopus)

Abstract

In order to better understand and more accurately measure the water balance in a proton exchange membrane fuel cell, our group has recently proposed to apply hot wire anemometry in the fuel cell's anode outlet. It was theoretically shown that the electrical signal obtained from the hot wire sensor can be directly converted into the fuel cell water balance. In this work an ex-situ experimental investigation is performed to examine the effect of the wire diameter and the outlet pipe diameter on the voltage signal. For a laboratory fuel cell where the mass flow rate the anode outlet is small, it is found important to use a small output pipe diameter to obtain a sufficiently strong convection effect and hence clear voltage readings. Depending on the hot wire diameter and the inner pipe diameter, the resulting values for the exponent of the Reynolds number Re in the determination of the Nusselt number Nu range between m = 0.137 and m = 0.246. In general, it is shown that applying hot wire anemometry yields in fact very clear voltage readings with high frequency, and it can be used as a diagnosis tool in various fuel cell applications.
Original languageEnglish
JournalInternational Journal of Hydrogen Energy
Volume41
Issue number33
Pages (from-to)14917–14926
Number of pages10
ISSN0360-3199
DOIs
Publication statusPublished - Sep 2016

Fingerprint

water balance
Proton exchange membrane fuel cells (PEMFC)
velocity measurement
fuel cells
wire
Wire
Fuel cells
membranes
outlets
protons
Pipe
Water
Anodes
Electric potential
electric potential
cell anodes
mass flow rate
Nusselt number
Reynolds number
anodes

Keywords

  • Proton exchange membrane fuel cells
  • Water balance
  • Hot-wire anemometry
  • Convection heat transfer around a cylinder
  • Fuel cell diagnosis
  • Power law

Cite this

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title = "Applying hot-wire anemometry to directly measure the water balance in a proton exchange membrane fuel cell: - Part 2: Experimental",
abstract = "In order to better understand and more accurately measure the water balance in a proton exchange membrane fuel cell, our group has recently proposed to apply hot wire anemometry in the fuel cell's anode outlet. It was theoretically shown that the electrical signal obtained from the hot wire sensor can be directly converted into the fuel cell water balance. In this work an ex-situ experimental investigation is performed to examine the effect of the wire diameter and the outlet pipe diameter on the voltage signal. For a laboratory fuel cell where the mass flow rate the anode outlet is small, it is found important to use a small output pipe diameter to obtain a sufficiently strong convection effect and hence clear voltage readings. Depending on the hot wire diameter and the inner pipe diameter, the resulting values for the exponent of the Reynolds number Re in the determination of the Nusselt number Nu range between m = 0.137 and m = 0.246. In general, it is shown that applying hot wire anemometry yields in fact very clear voltage readings with high frequency, and it can be used as a diagnosis tool in various fuel cell applications.",
keywords = "Proton exchange membrane fuel cells, Water balance, Hot-wire anemometry, Convection heat transfer around a cylinder, Fuel cell diagnosis, Power law",
author = "{Al Shakhshir}, Saher and Andreasen, {S{\o}ren Juhl} and Torsten Berning",
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language = "English",
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Applying hot-wire anemometry to directly measure the water balance in a proton exchange membrane fuel cell : - Part 2: Experimental. / Al Shakhshir, Saher; Andreasen, Søren Juhl; Berning, Torsten.

In: International Journal of Hydrogen Energy, Vol. 41, No. 33, 09.2016, p. 14917–14926.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Applying hot-wire anemometry to directly measure the water balance in a proton exchange membrane fuel cell

T2 - - Part 2: Experimental

AU - Al Shakhshir, Saher

AU - Andreasen, Søren Juhl

AU - Berning, Torsten

PY - 2016/9

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N2 - In order to better understand and more accurately measure the water balance in a proton exchange membrane fuel cell, our group has recently proposed to apply hot wire anemometry in the fuel cell's anode outlet. It was theoretically shown that the electrical signal obtained from the hot wire sensor can be directly converted into the fuel cell water balance. In this work an ex-situ experimental investigation is performed to examine the effect of the wire diameter and the outlet pipe diameter on the voltage signal. For a laboratory fuel cell where the mass flow rate the anode outlet is small, it is found important to use a small output pipe diameter to obtain a sufficiently strong convection effect and hence clear voltage readings. Depending on the hot wire diameter and the inner pipe diameter, the resulting values for the exponent of the Reynolds number Re in the determination of the Nusselt number Nu range between m = 0.137 and m = 0.246. In general, it is shown that applying hot wire anemometry yields in fact very clear voltage readings with high frequency, and it can be used as a diagnosis tool in various fuel cell applications.

AB - In order to better understand and more accurately measure the water balance in a proton exchange membrane fuel cell, our group has recently proposed to apply hot wire anemometry in the fuel cell's anode outlet. It was theoretically shown that the electrical signal obtained from the hot wire sensor can be directly converted into the fuel cell water balance. In this work an ex-situ experimental investigation is performed to examine the effect of the wire diameter and the outlet pipe diameter on the voltage signal. For a laboratory fuel cell where the mass flow rate the anode outlet is small, it is found important to use a small output pipe diameter to obtain a sufficiently strong convection effect and hence clear voltage readings. Depending on the hot wire diameter and the inner pipe diameter, the resulting values for the exponent of the Reynolds number Re in the determination of the Nusselt number Nu range between m = 0.137 and m = 0.246. In general, it is shown that applying hot wire anemometry yields in fact very clear voltage readings with high frequency, and it can be used as a diagnosis tool in various fuel cell applications.

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KW - Water balance

KW - Hot-wire anemometry

KW - Convection heat transfer around a cylinder

KW - Fuel cell diagnosis

KW - Power law

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