Condensation heat transfer of binary refrigerant mixtures of R22 and R114 inside a horizontal tube with internal spiral grooves

Shigeru Koyama, Akio Miyara, Hiroshi Takamatsu, Tetsu Fujii

研究成果: ジャーナルへの寄稿記事

50 引用 (Scopus)

抄録

An experimental study of the condensation of pure and mixed refrigerants of R22 and R114 inside a spirally grooved horizontal copper tube has been carried out. A double-tube counterflow condenser in the pressure range 3-21 bar and at a mass flow-rate 26-70 kg h-1 was used. The axial distributions of refrigerant, tube wall and cooling water temperatures, wall heat flux density and vapour quality are shown graphically. The variation of tube wall temperature around the circumference of the tube is also shown. The local Nusselt number depends on the molar fraction, whereas the average Nusselt number can be correlated by an equation which is modified from a previously established equation for pure refrigerants inside a horizontal smooth tube. The frictional pressure drop evaluated is correlated well by the Lockhart-Martinelli parameters and is independent of the concentration of the mixture.

元の言語英語
ページ(範囲)256-263
ページ数8
ジャーナルInternational Journal of Refrigeration
13
発行部数4
DOI
出版物ステータス出版済み - 7 1990

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Refrigerants
heat transfer
Condensation
Hot Temperature
Nusselt number
Heat transfer
condensers
Pressure
Temperature
mass flow
vapors
Condenser tubes
Copper
water temperature
cooling
copper
Cooling water
heat
Pressure drop
Water

All Science Journal Classification (ASJC) codes

  • Building and Construction
  • Mechanical Engineering

これを引用

Condensation heat transfer of binary refrigerant mixtures of R22 and R114 inside a horizontal tube with internal spiral grooves. / Koyama, Shigeru; Miyara, Akio; Takamatsu, Hiroshi; Fujii, Tetsu.

:: International Journal of Refrigeration, 巻 13, 番号 4, 07.1990, p. 256-263.

研究成果: ジャーナルへの寄稿記事

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