TAS / TASF, series, designed for maximum corrosion resistance, offers open circuit cooling towers, with a wide range of thermal potentials from hundreds of kW to very respectable sizes over 10 MW. All models apply a modular concept and are fully factory pre-assembled to minimize on-site installation costs. Each model can be customized with dimensions and characteristics based on project needs and in order to respect environmental constraints with reduced acoustic and energy impact. Regarding this, special executions are provided for ATEX environments (“EX” versions), for low temperature environments (“SN” versions), or for low noise emissions (“LN” version).
This series is used in all sectors in civil and industrial field in presence of corrosive environments (for metallurgy and beyond) with excellent results, thus being able to avoid the use of expensive materials such as stainless steel for structures. The main features of these open circuit evaporative towers are the following:
EXOSKELETON / MONOLITHIC ENCLOSURE
(body, fan stack and collection basin).
The tower exoskeleton is characterized by profiles made of hot-dip galvanized steel in accordance with UNI EN ISO 1461: 1999. The side cover panels are made with a multilayer fiberglass matrix (fiberglass FRP). Each diffuser can be walked on, and has a truncated pyramid shape to uniform the air crossing speeds in the lower section of the tower, improving the overall efficiency of the machines.
The tower body can be inspected thanks to the inspection doors and removable FRP walls (one for each cell), allowing the operator an easy entry.
An important feature is the presence of a particular coating called “SCAM / SHIELD”, consisting of a FRP sheet fixed with stainless steel bolts along the internal structural walls, wrapping the dispersion elements. In this way, the internal metal structure is completely isolated from the process water, and the phenomenon called “by-pass on wall” is also reduced. With the expression “by-pass on wall” we mean the water that, being nebulized on the internal walls of the tower, does not meet the air rising in against the current, (with consequent loss of efficiency). The perfect internal and external insulation therefore allows the meticulous elimination of any water leaks from the walls of the tower.
The collection basin, complete with all necessary connections for normal use, can be made on request in a weight-saving “self-draining” EU version in line with current European anti-legionella guidelines.
The basin is supplied with a pre-assembled structure consisting of welded metal sheet panels painted according to ISO 12944-5:2007 standards with SCAMBOND/HYB-C3M surface protection treatment (C4M or C5M on request) diversified anti-corrosion on internal and external surfaces, sandblasted with SA 2.5 grade with ISO 8501-1 quartz or metal grit. On the internal surfaces of the basin in the TASF series only, the diversified protective coating DURABOND / HYB is used: an evolution for aggressive environments consisting of a two-component epoxy-polyamide cycle preparatory to the subsequent FRP resin coating with the deposition of 2 hand-applied layers of glass fiber 450 g / m2 and a finish with epoxy / polyester resin (overall thickness 1500 g / m2).