Boiling Heat Transfer and Pressure Drop of Non-Azeotropic Mixtures Inside a Horizontal Grooved Tube

• KAJIKAWA Satoru

  R&D Div., Shinmaywa Industries, Ltd.

• AYUKAWA Kyozo

  Department of Mechanical Engineering, Ehime Univ.

• SOGO Motosuke

  Department of Mechanical Engineering, Ehime Univ.

• OKITA Yuji

  Department of Mechanical Engineering, Ehime Univ.

Bibliographic Information

Other Title

• 非共沸混合冷媒の水平溝付管内沸騰熱伝達と圧力損失

Abstract

The evaporation of HCFC141b, HFC152a and HFC23, and non-azeotropic refrigerant mixture used at the very low temperature refrigeration system is experimentally studied in a horizontal spirally grooved tube with corrugation.<br>The experiments were conducted at 0.03 to 0.47MPa of boiling pressure, 100 kg/(m²s) of mass flux, 1 to 15 kW/ m² of heat flux, -26 to 21 °C of refrigerant temperature and 11.4 mm of average inner diameter.<br>It is concluded that boiling heat transfer coefficients of single-refrigerant are higher than these of non-azeotropic refrigerant mixture. And dimensionless correlation of the heat transfer coefficirnts, i.e. Lockhart-Martinelli parameters agreed with equation (10) within the limit of ±40 percent. Pressure drops of these refrigerant mixture depend on its liquid density and flow pattern.

Journal

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

  Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers 12 (1), 53-62, 1995

  Japan Society of Refrigerating and Air Conditioning Engineers

Keywords

• Non-Azeotropic Refrigerant Mixture
• Heat Transfer Coefficient
• Evaporation
• Pressure Drop
• Grooved Tube

Details

• CRID: 1390001204666307712
• NII Article ID: 10002713144
• NII Book ID: AN10035654
• DOI: 10.11322/tjsrae.12.53
• ISSN: 2185789X
• ISSN: 13444905
• Text Lang: ja
• Data Source:
  • JaLC
  • CiNii Articles
• Abstract License Flag: Disallowed