Transcription of TheBasicsof AIR-COOLEDHEATEXCHANGERS - Chart …
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TheBasicsof AIR-COOLEDHEATEXCHANGERS - Chart …
The Basics of AIR-COOLED HEAT EXCHANGERS. HUDSON. Products Corporation A Subsidiary of Hudson Products Holdings, Inc. CONTENTS. Page FOREWORD ..i NOMENCLATURE ..ii I. DESCRIPTION OF AIR-COOLED HEAT EXCHANGERS ..1. Components ..1. Tube Bundle ..1. Axial Flow Fans ..5. Plenum ..6. Mechanical Equipment ..6. Structure ..6. Comparison of Induced and Forced Units ..7. Induced Draft ..7. Forced Draft ..7. II. THERMAL DESIGN ..8. Typical Heat Transfer Case I ..13. Application of Design Method ..19. Sample Problem ..20. Fan Selection Horsepower Requirements ..21. III. PERFORMANCE CONTROL OF ACHEs ..21. Varying Air Flow ..23. Extreme Case Controls ..23. Internal Recirculation ..23. External Recirculation ..23. Co-current Flow ..23. Auxiliary Heating Coils Steam or Glycol ..23. IV. NOISE CONTROL ..24. V. DESIGN OF ACHEs FOR VISCOUS LIQUIDS ..24. VI. COST ..25. REFERENCES ..25. TABLES. Page 1. Guide to First Estimates of Bundle Rows ..19. 2. Typical Heat Transfer Coefficients for Air-Cooled Heat Exchangers.
and below 750°F.The wrap-on footed fin tube can be used below 250°F; however, the bond between the fin and the tube will loosen in time and the heat transfer is not predictable with certainty over the life of the cooler. It is advisable to derate the effectiveness of the wrap-on tube to allow for this probability.
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