Development of an Accordion-type Offset-fin Heat Exchanger for Air-conditioners

• ITOH Masaaki

  Mechanical Engineering Research Laboratory, Hitachi, Ltd.

• KOGURE Hiroshi

  Refrigeration & Air Conditioning Division, Hitachi, Ltd.

• MIYAGI Masahiro

  Refrigeration & Air Conditioning Division, Hitachi, Ltd.

• MOCHIZUKI Sadanari

  Dept. of Mechanical Engineering, Tokyo University of Agriculture and Technology

• YAGI Yoshinao

  Tokyo Polytechnic College

• KUNUGI Yoshifumi

  Mechanical Engineering Research Laboratory, Hitachi, Ltd.

Bibliographic Information

Other Title

• 空調用アコーディオン形オフセットフィン熱交換器の開発

Abstract

To reduce the depth of the indoor heat exchanger in room air-conditioners, we studied fin and tube heat exchangers, and found that we could make the heat transfer coefficient of fins 30% higher than of conventional fins by reducing louver width and fin pitch.<br>We also improved water drainage on the surface of the fins by adopting accordion-type offset-fin heat exchangers.<br>We found that the material cost of a heat exchanger was minimized when the heat exchanger had a tube 7 mm in diameter, and we could increase the heat transter coefficient of the refrigerant side by developing a new grooved tube 7 mm in diameter.<br>We succeeded in making the heat exchanger 40% thinner than conventional types.

Journal

• Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers

  Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers 12 (2), 219-224, 1995

  Japan Society of Refrigerating and Air Conditioning Engineers

Keywords

• Heat Transfer Coefficient
• Pressure Drop
• Fin
• Tube
• Heat Exchanger
• Drainage
• Offset-fin
• Air-conditioner

Details

• CRID: 1390001204666314112
• NII Article ID: 10002713361
• NII Book ID: AN10035654
• DOI: 10.11322/tjsrae.12.219
• ISSN: 2185789X
• ISSN: 13444905
• Text Lang: ja
• Data Source:
  • JaLC
  • CiNii Articles
• Abstract License Flag: Disallowed