Closed Circuit Evaporative Water Coolers
Of induced or forced draft design, closed circuit coolers are primarily installed where higher levels of cooling water quality needs to be maintained. They can be sited inside or outside and noise attenuated if necessary.
Principle of operation:
The process cooling water is circulated through a closed tube nest, which replaces the open fill pack. Heat from the water is dissipated through the tube walls to water cascading over the tube nest.
Simultaneously, air is forced upward and over the nest causing some of the water to evaporate and cooling to take place. The resulting warm moist air is rejected to atmosphere.
Features include:
- Cooling capacities from 100kW to 5,000kW.
- Body and basin constructed from Z725 galvanised steel.
- Low sound design.
- Vertical air discharge at a sufficient distance from the horizontal air intake to prevent air re-circulation.
- Highly efficient drift eliminator limiting water losses to less than 0.001% of the water re-circulation rate.
- Patented hot dip galvanised coil nest designed to minimise air pressure drop while maximising tube surface area and heat transfer capability. The low air pressure drop means that smaller fan motors can be installed leading to lower operating costs.
- Superior two pass air intake louvre and screen design which minimises water splash out and blocks sunlight to reduce algae formation (induced draught only).
- Pressurised water distribution system with sediment preventing sludge rings incorporated within the spray nozzles. Easily removed for maintenance.
- A.C.O.P. L8-2000 compliant.
