CCTS / CCFS series offers evaporative coolers (a.k.a. closed circuit evaporative towers or evaporative condensers) with smooth tubes heat exchange beams, designed to, respectively, cool water mixtures and to condense hot vapors. Those machines are made to be as resistant as possible to corrosion with a wide range of thermal potentiality, to a few kWs from 10 or more MWs.
All models are modular and totally factory pre- assembled to minimize installation costs on the site. Every model can be customized in terms of dimensions and project characteristics and can be designed to follow environmental constraints to reduce visual and acoustic impacts. For this matter, we planned special executions such as ATEX (“EX” versions), low noise (“LN” versions) and low temnperature (“SN” versions).
The main feature that distinguishes closed circuit evaporative towers from open circuit ones is that primary fluid, which runs in inner tube beams, is totally separated from cooling fluid’s secondary circuit. Secondary circuit is made of a recirculating pump, which conveys water from basin to spray nozzles on the top side of the tower. Tube beams water irroration allows the cooling of the inner fluid, using evaporative effect and consequential enthalpic exchange. Recirculating fluid, which can be both in a liquid or a gaseous state, is never going on contact with ambience, avoiding any type of contamination.
The main characteristics of these closed circuit evaporative towers are the following:
STRUCTURE / MONOLITHIC ENCLOSURE ( body, fan stack and water basin ).
The tower structure is characterized by profiles made of hot-dip galvanized steel in accordance with UNI EN ISO 1461: 1999. The cover panels sides are made in sandwich format with a thickness of 22 mm, with a polyurethane foam core covered with fiberglass sheets (FRP fiberglass). Each diffuser fan stack can be walked on, and has a truncated pyramid shape to standardize the air crossing speeds in the lower section of the tower, improving the overall efficiency of the machines. The tower body can be fully inspected thanks to the inspection doors and removable FRP walls (one for each cell), allowing the operator an easy entry.
An important feature for CCTS / CCFS towers 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, reducing the phenomenon called “by-pass on wall”, that is the water which, being nebulized on the internal walls of the tower, does not meet the air that rises 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 basin, complete with all the connections necessary 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 sheet metal panels protected with our hybrid protective cycle DURABOND/HYB: a solution designed for aggressive environments, consisting of a two-component epoxy- polyamide cycle preparatory to the subsequent FRP resin coating with the deposition of 2 hand-deposited layers of glass fiber of 450 gr/m2 and a finish with epoxy/polyester resin (overall thickness 1500 gr/m2).