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Air-side heat transfer performance of louver fin and multi-tube heat exchanger for fuel-cell cooling application.

Number: pap. 2538

Author(s) : KANG H. C., OH H. S., LEE M. K., et al.

Summary

This work is performed to evaluate the heat transfer performance of a heat exchanger used in a fuel cell. Because of material constraints and performance requirements, a louver fin heat exchanger is modified for use with conventional micro-channel tubes and with multiple small-diameter tubes (a so-called multi-tube). Prototype heat exchangers are tested, and the air-side heat transfer, pressure drop, and fan power are measured in a wind tunnel and simulated using a commercial code. The air-side pressure drop and heat transfer coefficient of the multi-tubes show similar trends to those of the flat-tube heat exchanger if the contact resistance is negligible. The tube spacing of the prototype multi-tube heat exchangers has a small effect on the pressure drop and heat transfer, but it has a profound effect on air-side heat transfer performance because of the contact resistance between the tubes and louver fins. The air-side pressure drop agrees well with an empirical correlation for flat tubes.

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Pages: 9 p.

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Details

  • Original title: Air-side heat transfer performance of louver fin and multi-tube heat exchanger for fuel-cell cooling application.
  • Record ID : 30007126
  • Languages: English
  • Source: 2012 Purdue Conferences. 14th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2012/07/16

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