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HEI 3087 2nd Edition

Standards for Air Cooled Condensers, 2nd Edition
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The HEI Standards for Air Cooled Condensers (2nd Edition) is the specialized industry manual for "dry cooling" systems. Unlike traditional surface condensers that use circulating water, an Air Cooled Condenser (ACC) rejects heat directly to the atmosphere by blowing ambient air over finned tube bundles.

This standard has become increasingly critical as water scarcity and environmental regulations push power plants away from water-intensive cooling towards dry cooling technology.

Technical Scope & Content

The 2nd Edition provides a comprehensive framework for the design and procurement of these massive A-frame structures:

  • Thermal Performance: Formulas for calculating heat transfer coefficients on both the steam side (inside the tubes) and the air side (across the fins). It accounts for the varying efficiency of different fin types (e.g., wavy fins, extruded fins).
  • Air-Side Hydraulics: Standards for calculating the static pressure drop across the tube bundles, which is essential for sizing the massive fans (often 30+ feet in diameter) that move the air.
  • Structural Design: Because ACCs are massive outdoor structures, the standard includes requirements for supporting the weight of the steam ducting and resisting wind and seismic loads.
  • Mechanical Components: Specifications for the critical drive-train components, including the fans, gearboxes, and motors, ensuring they can operate reliably in extreme outdoor temperatures.
SDO HEI: Heat Exchange Institute
Document Number 3087
Publication Date Jan. 1, 2016
Language en - English
Page Count 56
Revision Level 2
Supercedes
Committee
Publish Date Document Id Type View
Jan. 1, 2016 HEI 3087 2nd Edition Revision