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COIL FREEZING: KEEP THE FLUIDS FLOWING.

Author(s) : CLARK T. J.

Type of article: Article

Summary

THE PROBLEM REFERS TO STEAM HEATING COILS WITH PARALLEL MULTIPLE TUBES. IF THE FEED IS FROM A TOP HEADER, ANY TUBE EXPERIENCING DIFFERENT HEAT TRANSFER CONDITIONS, EG FROM POOR AIR DISTRIBUTION OVER THE BATTERY, WILL CONDENSE AT A DIFFERENT RATE THUS CAUSING UNEQUAL PRESSURE AT TUBE OUTLETS, HENCE A TENDENCY TO BACK UP CONDENSATE. FEED METHODS ARE ILLUSTRATED WHICH AVOID THIS. BAD INSTALLATION MAY PRODUCE VARIABLE GRAVITY EFFECTS AND POOR VENTING CAN GIVE ACCUMULATIONS OF NON-CONDENSIBLES. CONTROL LIMITS MAY ALSO RESULT IN CONDENSATION AT BELOW TRAP DRAINAGE PRESSURE, RESULTING ALSO IN CONDENSATE BACK UP. POOR STEAM TRAP SIZING MAY ALSO BE RESPONSIBLE. D.W.H.

Details

  • Original title: COIL FREEZING: KEEP THE FLUIDS FLOWING.
  • Record ID : 1991-2135
  • Languages: English
  • Source: Heat. Pip. Air Cond. - vol. 62 - n. 12
  • Publication date: 1990/12
  • Document available for consultation in the library of the IIR headquarters only.

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