Torre de resfriamento circular DBNL₃ em PRFV

Especificação

Tower type	Circular counter-flow, induced draft, FRP shell
Water temperature drop	3–8 °C on D / CD duty · 10–25 °C on GBNL₃ industrial duty
Noise class	D low-noise · CD ultra-low-noise, approx. 5 dB(A) lower than D
Fan	Tsinghua-designed; aluminium-alloy or FRP airfoil blades, wide chord, large angle; blade angle adjustable from size 150
Drive	Polyester-fibre reinforced neoprene belt — high temperature, no slip, low noise
Motor	IP55, class F insulation, sealed waterproof, heat resistant
Fill	Modified PVC corrugated sheet, flame retardant — 70 °C high-temp grade / 50 °C low-temp grade
Perda por arraste	Collector hood at the air outlet keeps drift loss to a minimum
Cold climate	Suitable to −50 °C; anti-icing package for sites below −10 °C monthly average; fan can reverse briefly for de-icing
Support frame	Assembled galvanised or painted structure, galvanised or stainless fasteners

Notas de projeto

• Belt drive, not a gearboxA polyester-reinforced neoprene belt absorbs shock loads and keeps the motor out of the hot air stream. No oil to change, no oil-temperature alarm to ignore.
• Low drift by geometryThe water collector at the outlet recovers spray that would otherwise leave with the exhaust air, so make-up water and chemical treatment stay low.
• Built for cold sitesAnti-icing package and short fan reversal for de-icing let the tower run through a −50 °C design condition rather than being drained each winter.
• Two noise classes from one shellThe CD build adds an absorption hood at the air outlet and an absorption pad in the basin — same footprint, roughly 5 dB(A) quieter.