Discrete ejector control solution design, characterization, and verification in a 5 kW PEMFC system

Research output: Contribution to journalArticleScientificpeer-review

14 Citations (Scopus)

Abstract

An ejector primary gas flow control solution based on three solenoid valves is designed, implemented and tested in a 5 kW proton exchange membrane fuel cell (PEMFC) system with ejector-based anode gas recirculation. The robust and cost effective combination of the tested flow control method and a single ejector is shown to achieve adequate anode gas recirculation rate on a wide PEMFC load range. In addition, the effect of anode gas inert content on ejector performance in the 5 kW PEMFC system is studied at varying load and anode pressure levels. Results show that increasing the inert content increases recirculated anode gas mass flow rate but decreases both the molar flow rate and the anode inlet humidity. Finally, the PEMFC power ramp-rate limitations are studied using two fuel supply strategies: 1) advancing fuel supply and venting out extra fuel and 2) not advancing fuel supply but instead using a large anode volume. Results indicate that the power of the present PEMFC system can be ramped from 1 kW to 4.2 kW within few hundred milliseconds using either of these strategies.
Original languageEnglish
Pages (from-to)16760-16772
Number of pages13
JournalInternational Journal of Hydrogen Energy
Volume42
Issue number26
DOIs
Publication statusPublished - 29 Jun 2017
MoE publication typeA1 Journal article-refereed

Fingerprint

ejectors
Proton exchange membrane fuel cells (PEMFC)
fuel cells
Anodes
anodes
membranes
protons
Flow control
Gases
solenoid valves
gases
Flow rate
Solenoid valves
venting
mass flow rate
Inert gases
ramps
gas flow
Flow of gases
humidity

Keywords

  • anode gas recirculation
  • ejector
  • ejector control
  • inert build-up
  • PEMFC
  • power ramp-up

Cite this

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title = "Discrete ejector control solution design, characterization, and verification in a 5 kW PEMFC system",
abstract = "An ejector primary gas flow control solution based on three solenoid valves is designed, implemented and tested in a 5 kW proton exchange membrane fuel cell (PEMFC) system with ejector-based anode gas recirculation. The robust and cost effective combination of the tested flow control method and a single ejector is shown to achieve adequate anode gas recirculation rate on a wide PEMFC load range. In addition, the effect of anode gas inert content on ejector performance in the 5 kW PEMFC system is studied at varying load and anode pressure levels. Results show that increasing the inert content increases recirculated anode gas mass flow rate but decreases both the molar flow rate and the anode inlet humidity. Finally, the PEMFC power ramp-rate limitations are studied using two fuel supply strategies: 1) advancing fuel supply and venting out extra fuel and 2) not advancing fuel supply but instead using a large anode volume. Results indicate that the power of the present PEMFC system can be ramped from 1 kW to 4.2 kW within few hundred milliseconds using either of these strategies.",
keywords = "anode gas recirculation, ejector, ejector control, inert build-up, PEMFC, power ramp-up",
author = "K. Nikiforow and P. Koski and J. Ihonen",
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Discrete ejector control solution design, characterization, and verification in a 5 kW PEMFC system. / Nikiforow, K.; Koski, P.; Ihonen, J.

In: International Journal of Hydrogen Energy, Vol. 42, No. 26, 29.06.2017, p. 16760-16772.

Research output: Contribution to journalArticleScientificpeer-review

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AU - Ihonen, J.

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N2 - An ejector primary gas flow control solution based on three solenoid valves is designed, implemented and tested in a 5 kW proton exchange membrane fuel cell (PEMFC) system with ejector-based anode gas recirculation. The robust and cost effective combination of the tested flow control method and a single ejector is shown to achieve adequate anode gas recirculation rate on a wide PEMFC load range. In addition, the effect of anode gas inert content on ejector performance in the 5 kW PEMFC system is studied at varying load and anode pressure levels. Results show that increasing the inert content increases recirculated anode gas mass flow rate but decreases both the molar flow rate and the anode inlet humidity. Finally, the PEMFC power ramp-rate limitations are studied using two fuel supply strategies: 1) advancing fuel supply and venting out extra fuel and 2) not advancing fuel supply but instead using a large anode volume. Results indicate that the power of the present PEMFC system can be ramped from 1 kW to 4.2 kW within few hundred milliseconds using either of these strategies.

AB - An ejector primary gas flow control solution based on three solenoid valves is designed, implemented and tested in a 5 kW proton exchange membrane fuel cell (PEMFC) system with ejector-based anode gas recirculation. The robust and cost effective combination of the tested flow control method and a single ejector is shown to achieve adequate anode gas recirculation rate on a wide PEMFC load range. In addition, the effect of anode gas inert content on ejector performance in the 5 kW PEMFC system is studied at varying load and anode pressure levels. Results show that increasing the inert content increases recirculated anode gas mass flow rate but decreases both the molar flow rate and the anode inlet humidity. Finally, the PEMFC power ramp-rate limitations are studied using two fuel supply strategies: 1) advancing fuel supply and venting out extra fuel and 2) not advancing fuel supply but instead using a large anode volume. Results indicate that the power of the present PEMFC system can be ramped from 1 kW to 4.2 kW within few hundred milliseconds using either of these strategies.

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