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PERFORMANCE EVALUATION OF THE EFFECTS OF A GROUP OF TURBULATOR INSERTS ON HEAT TRANSFER FROM GASES IN TUBES.

Author(s) : JUNKHAN G. H.

Summary

THE PERFORMANCE OF A GROUP OF BENT-STRIP INSERTS IN TUBES CARR YING HOT GASES IS STUDIED. THE PERFORMANCES ARE COMPARED BY USE OF PERFORMANCE EVALUATION CRITERIA (PEC). THE PEC WERE BASED ON INCREASE IN HEAT DUTY FOR FIXED GEOMETRY UNDER EITHER A FIXED PRESSURE DROP CONSTRAINT ORA CONSTANT PUMPING POWER CONSTRAINT. NEW DATA ARE GIVEN FOR 2 CONFIGURATIONS OF A BENT-TAB INSERT AND THE SAME PEC ARE APPLIED TO DETERMINE THEIR RELATIVE PERFORMANCE. IMPROVEMENTS IN CONVECTIVE HEAT TRANSFER COEFFICIENTS FOR BOTH TYPES OF INSERTS ARE STRONGLY DEPENDENT ON REYNOLDS NUMBER OVER THE TEST RANGE OF 3,000 TO 30,000. UNDER THE CONSTANT PRESSURE DROP CONSTRAINT, BOTH TYPES OF INSERTS SHOWED IMPROVEMENTS OVER A SMOOTH TUBE ONLY AT LOWER REYNOLDS NUMBERS. UNDER THE CONSTANT PUMPING POWER CONSTRAINT, LARGER IMPROVEMENTS WERE FOUND AND FOR A WIDER RANGE OF REYNOLDS NUMBERS.

Details

  • Original title: PERFORMANCE EVALUATION OF THE EFFECTS OF A GROUP OF TURBULATOR INSERTS ON HEAT TRANSFER FROM GASES IN TUBES.
  • Record ID : 1989-2201
  • Languages: English
  • Publication date: 1988
  • Source: Source: ASHRAE Trans.
    vol. 94; n. 2; 1195-1212; 12 fig.; 2 tabl.; 11 ref.
  • Document available for consultation in the library of the IIR headquarters only.

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