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ENHANCED HEAT TRANSFER TUBES FOR THE EVAPORATOR OF REFRIGERATING MACHINES. 3. EVAPORATIVE HEAT TRANSFER FROM HORIZONTAL TUBES IN THIN FILM FLOW.

[In Japanese. / En japonais.]

Author(s) : KUWAHARA H.

Type of article: Article

Summary

ON HEATED HORIZONTAL TUBES (18 MM OUTSIDE DIAMETER) HAVING THE POROUS SURFACE, A FALLING FILM OF R11 FLOW RATE 0.008-0.09 KG/(M.S) WAS EVAPORATED AT ATMOSPHERIC PRESSURE. THE HEAT TRANSFER COEFFICIENT OF LIQUID FILM EVAPORATION IS HIGHER THAN THAT OF POOL BOILING WHEN THE WALL SUPERHEAT IS SMALL ; THE ENHANCEMENT RATIO REDUCES ON THE SURFACE STRUCTURE WHERE THE POOL BOILING HEAT TRANSFER COEFFICIENT IS ALREADY HIGH. THE APPEARANCE OF DRY SPOTS ON THE POROUS SURFACE WAS OBSERVED ONLY AT A SMALL FLOW RATE CLOSE TO THE THRESHOLD VALUE FOR COMPLETE DRY-OUT. (JSME INT. J., SER. II, JP., 31, N 2, 1988/05, 348-349.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 1989-0879
  • Languages: Japanese
  • Source: Trans. JSME, B - vol. 53 - n. 494.
  • Publication date: 1988
  • Document available for consultation in the library of the IIR headquarters only.

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