A numerical study on the characteristics of cooling and water distribution of a passive type PEMFC stack

Jaehyuk Lee, Bosung Kim, Yong Chan Kim, Yongtaek Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In a passive type PEMFC system, axial fans operate to supply both oxidant and coolant to cathode side of the stack by using ambient air. It is possible to make simple system, because a passive type PEMFC does not use additional cooling equipment or humidifier. However, the cooling performance of the air-cooling system is lower than the cooling system which uses water as coolant. To ensure the system reliability, an optimized stack cooling strategy is necessary. In this study, simulation has been done to find best cooing strategy. We adopted various channel configuration and graded air flow rate distribution at the cathode side and external heat transfer coefficient. In addition, we observed the water distribution at the MEA of each cell to understand the dry-out phenomenon. five channel air-cooling PEMFC stack was developed and investigated. The cell with thick rib width channel and even air flow rate distribution shows better cooling performance. In addition, the amount of water inside the center unit cell MEA is significantly reduced by the overheating.

Original languageEnglish
Title of host publication5th Asian Conference on Refrigeration and Air Conditioning, ACRA 2010 - Green Breeze from Asia: Frontiers of Refrigerants, Heat Transfer and System
PublisherJapan Society of Refrigeration and Air Conditioning Engineering (JSRAE)
ISBN (Print)9781634391252
Publication statusPublished - 2010 Jan 1
Event5th Asian Conference on Refrigeration and Air Conditioning - Green Breeze from Asia: Frontiers of Refrigerants, Heat Transfer and System, ACRA 2010 - Tokyo, Japan
Duration: 2010 Jun 72010 Jun 9

Other

Other5th Asian Conference on Refrigeration and Air Conditioning - Green Breeze from Asia: Frontiers of Refrigerants, Heat Transfer and System, ACRA 2010
CountryJapan
CityTokyo
Period10/6/710/6/9

ASJC Scopus subject areas

  • Engineering(all)
  • Environmental Engineering

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    Lee, J., Kim, B., Kim, Y. C., & Lee, Y. (2010). A numerical study on the characteristics of cooling and water distribution of a passive type PEMFC stack. In 5th Asian Conference on Refrigeration and Air Conditioning, ACRA 2010 - Green Breeze from Asia: Frontiers of Refrigerants, Heat Transfer and System Japan Society of Refrigeration and Air Conditioning Engineering (JSRAE).