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AIR COOLERS WITH REFRIGERANT CIRCULATION BY GRAVITY.

[In Norwegian. / En norvégien.]

Author(s) : HAUKAS H. T.

Type of article: Article

Summary

THE MECHANISMS WHICH GOVERN FLOW IN A SELF-CIRCULATION LOOP ARE DISCUSSED, AND THEIR EFFECT ON THE FLOW RATE IS DEMONSTRATED. DUE TO THE DIFFERENT NATURE OF THE PRESSURE DROP COMPONENTS, THE FRICTIONAL AND THE ACCELERATIONAL COMPONENTS, ON THE ONE HAND, AND THE GRAVITATIONAL EFFECTS, ON THE OTHER, THE FLOW RATE WILL SHOW A MAXIMUM BOTH WITH RESPECT TO THE EVAPORATOR LOAD AND TO THE LENGTH OF THE TUBING. A COMMONLY DESIGNED UNIT OPERATES IN A REGION WITH A SEVERE FALL IN FLOW RATE AS LOAD AND/OR TUBE LENGTH IS INCREASED, WHICH MAY EASILY LEAD TO STARVING OF A POORLY DESIGNED EVAPORATOR. EXAMPLES OF THE EFFECT OF THE EVAPORATOR LOAD AND THE TEMPERATURE LEVEL ARE SHOWN. FROM THESE FIGURES IT MAY BE CONCLUDED THE LENGTH OF THE EVAPORATOR TUBES SHOULD BE 1,000-1,200 TIMES THE INNER DIAMETER, WHEN THE COOLER OPERATES AS HEAT PUMP OR COOLING CONDITIONS.

Details

  • Original title: [In Norwegian. / En norvégien.]
  • Record ID : 1984-2274
  • Languages: Norwegian
  • Source: Scand. Refrig. - vol. 13 - n. 2
  • Publication date: 1984/04
  • Document available for consultation in the library of the IIR headquarters only.

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