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GFNS₂ · 800–4,000 m³/h per cell

GFNS₂ Concrete-Frame Square Counter-Flow Tower

The nine-size concrete-frame range: patented frame, patented fill, VFD drive with 40–52 % annual saving.

  • MotorVariable frequency; low-speed reverse in winter for de-icing

GFNS₂ is the large-volume tower jointly developed with the China Machinery Ministry No.4 Design & Research Institute and Tsinghua University. Single-cell capacity runs from 800 to 4,000 m³/h across nine specifications. The concrete main frame holds a natural frequency of 12 Hz with a maximum amplitude of 0.09 mm, so the tower stays quiet and stable in wind; the fill is a trapezoidal wave sheet with 23 mm wave height and 30 mm pitch that raises fill height from 1.0 m to 1.5 m in the same envelope. Three national patents cover the drive, the frame and the fill.

Specification

Single-cell capacity800–4,000 m³/h, nine specifications
Main frameReinforced concrete, natural frequency 12 Hz, max amplitude 0.09 mm
EnclosurePolyester FRP — light, high strength, corrosion and ageing resistant
Fan cylinderKinetic-energy-recovery type, FRP
Fan bladeEpoxy FRP, airfoil section, foam-filled core
ReducerHorizontal, oil-lubricated, oil-temperature and vibration alarm
MotorVariable frequency; low-speed reverse in winter for de-icing
FillModified PVC trapezoidal wave, −35 °C to 65 °C, flame retardant, to NDGJ88-89
Water distributionPipe type, three-splash Type II nozzles, 1.5 m free head
DriftHC150-45 eliminator, drift below 0.01 % at high speed

Design notes

  • Patent 88215994.1 — energy-saving FRP towerThe VFD drive delivers 40–52 % annual energy saving against a fixed-speed tower of the same duty.
  • Patent 93201355.4 — beam frameCantilever multi-span continuous-beam RC frame with air-inlet columns moved inward 1–2.5 m, cutting vortex losses and lowering tower height by 0.5–0.9 m.
  • Patent 91216967.2 — trapezoidal fill23 mm wave, 30 mm pitch, fill height raised from 1.0 m to 1.5 m — more heat transfer in the same plan area.
  • Stable under windA 12 Hz natural frequency and 0.09 mm amplitude keep the structure out of resonance without extra stiffening.

Options

  • Multi-cell arrangement for very large circulating systems
  • Stainless or FRP water distribution headers
  • Winter de-icing and basin heating control
  • Structural drawings stamped for local building approval

Applications

  • Thermal and nuclear power plants
  • Petroleum refineries and petrochemical plants
  • Steel and metallurgy plants
  • Large manufacturing and industrial parks

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