YUHONG GROUP has recently executed multiple heat exchanger projects, among which air-cooled heat exchangers (ACHEs) hold significant importance. This article will provide a professional technical analysis covering the definition, applications, structural components, and classifications of ACHE systems.

1. ■ What is The Air Cooler?
   Air Cooled Heat Exchanger (ACHE) is an energy-efficient device that facilitates thermal exchange between process fluids and ambient air. The operational principle involves axial fans forcing air across finned tube bundles, enabling convective heat transfer to atmosphere. Compared with traditional water-cooling systems, ACHEs reduce water consumption by over 95%, making them particularly suitable for arid regions. Yuhong's ACHE designs incorporate CFD-optimized airflow distribution, achieving temperature control accuracy of ±1.5°C.

2. ■ Applications of Air Coolers
   Key industrial applications include:
   • Petrochemical: Reaction product cooling in refining units (e.g., 420°C vapor cooling in delayed coking)
   • Power Generation: Gas turbine inlet air cooling (enhancing power output by 3-5%)
   • Metallurgy: Closed-loop cooling for blast furnace systems
   • LNG Processing: BOG (Boil-Off Gas) recondensation
   Case Study: Yuhong's ACHE array in a 10-million-ton refinery project demonstrates 8500m² heat transfer area per unit, successfully cooling process fluid from 280°C to 80°C.

3. ■ Structural Components of Air Coolers
   Standard configuration comprises:
   • Tube Bundles: High-frequency welded spiral finned tubes (18:1 fin ratio), materials include SA214 carbon steel/304 stainless steel
   • Fan System: Variable frequency drive (VFD) axial fans (Ø3-9.5m) with IP55 motors
   • Structural Frame: Wind load-resistant design (withstands 50m/s wind speed)
   • Louver Dampers: Electrically actuated blades (±2° positioning accuracy)
   • Spray System (for wet units): Full-cone spray nozzles with >95% coverage

4. ■ Classification of ACHEs
   By cooling methodology:

This technical overview demonstrates Yuhong Group's engineering capabilities in delivering customized ACHE solutions across diverse industrial sectors.