Explosion-proof compliance costs. Fan electricity bills. Motor failures.
The LHRD Series eliminates all three — with hydraulic turbine drive.

Not necessarily. For new projects, the turbine head loss (36–54 kPa) is factored into the total system head during design. The additional pump shaft power required is far less than the power that would be consumed by a conventional fan motor, so overall energy savings remain substantial. For retrofit projects, most existing systems are designed with a 10–20% head margin, meaning the pump discharge valve is partially throttled. The LHRD simply recovers that wasted pressure — no pump replacement is typically required.

Yes. Vietnam's TCVN 10888 (aligned with IEC 60079) governs electrical equipment that may generate ignition sources. The LHRD tower top contains no electrical junction boxes, motors, or sensors — it is a purely mechanical assembly. Without an electrical source, it falls outside the scope of electrical explosion-proof standards. In chemical engineering, this is called intrinsic safety: eliminating the hazard source itself rather than containing it with a protective enclosure.

The LHRD is not a perpetual motion machine. Fan power consumption is genuinely 0 kW, but the energy source is the pressure work performed by the main circulation pump. Conservation of energy still holds. The commercial value lies in recovering pressure that would otherwise be wasted across a throttle valve, and converting it into useful fan work. Ground-level pumps typically achieve 85%+ efficiency, whereas tower-top motors lose energy through gearboxes and belts. Replacing inefficient tower-top drive with efficient pump work reduces total operating costs.

Turbine speed is proportional to water flow rate. When circulation flow drops below approximately 60% of rated capacity, fan speed decreases noticeably and cooling output falls accordingly. If your plant operates at sustained low loads during winter or night shifts, confirm with a COOLTEK engineer that the reduced fan speed still meets your minimum process cooling requirement.

The LHRD uses the same FRP (fibreglass-reinforced plastic) shell as the LHR series — corrosion-resistant and UV-stable, with a 15–20 year service life in Vietnam's hot, humid climate. In aggressive chemical environments (e.g. H₂S or chlorine-bearing atmospheres), FRP outperforms steel tower structures significantly. The stainless steel turbine impeller is fully submerged in circulating water, providing self-cooling and eliminating the need for additional corrosion protection.

LHRD typically costs more than a standard cooling tower but is comparable to or less than a tower equipped with IECEx-certified explosion-proof motors (which cost 3–5× more than standard motors, plus explosion-proof control panels and conduit wiring). More importantly, the LHRD consumes 0 kW of fan power over its 15-year life. At Vietnam's industrial tariff of 2,204 VND/kWh, every 10 kW of fan motor replaced saves approximately 193 million VND per year — typically recovering the cost premium within 1–2 years.