TGA

The open circuit cooling towers series TGA, consist of 35 models ranging from 160 to 3.780 kW nominal, has the main characteristic the metallic construction, this provides them the maximum flexibility to adapt at any necessity of the installation companies or clients - users suggestions.

The cooling towers series TGA can be made in hot dip galvanized  or stainless steel, they can be equipped with the wanted complementary registration doors and the dimensions can adapt easiness to the foreseen space while allows at same time, in the most models, shipping into a High Cube standard container.

Our Technical Office, with a wide experience of more that 40 years in the design of evaporative cooling equipment, is to the service of engineering firms and users for study any suggestion.

Induced draft fan

Induced draft fan

The axial fan in TVA cooling towers is situated in downstream of the air flow, it operates in suction, allowing a uniform flow of air through the filling. The air inlet is at the four sides, and therefore not influenced by the wind direction. Hot and humid air recirculation, the main factor for capacity reduction of evaporative cooling equipment, is limited by the high discharge velocity of the induced fans.

No transmission

In the TGA series the impellers are directed coupled to special electric motors, appropiate to work in hunid atmosphere. No maintenance is therefore required and there are no risk of belts breaking.

The electric box connections is transferred outside the cooling tower.

Easy maintenance

Easy maintenance

All the series TGA cooling towers is equipped with one or several access great doors for maintenance and/or remove the wet deck filling, the headers with spraying nozzles or the drift eliminators..

The water spraying rubber nozzles are the centrifugal type, without internal helix and large diameter outlet to avoid obstructions. The rubber nozzles can be removed quickly from the headers due to the absence of screws.

The air intake grids Made up of PVC modeled sheets glued, contained in a stainless steel frames in such that is easy to take out for access. This grid type prevents the entrance the strange bodies, the water splash on the outside and avoids the sunlight entrance, hindering the algae growing or other microorganisms proliferation.

The cold water basin is with sloped design for easy drain and cleaning.

High efficiency

The axial fans are formed by adjustable pitch blades, manufactured in glass reinforced polypropylene (PPG) which is highly resistant to abrasion, and hub in cast aluminium. The blades air foil profile provides a high efficiency with a low noise level.

Easy transport - Containerized

Most of the models of the TGA series cooling towers have been designed with adequate size to be easily transported and reducing costs in a standard or high cube container, which excludes the use of expensive special transports.

The towers are supplied absolutely assembled and the bigger models in two sections. The assembly operation is simply the superposition of the two sections and their fixation with screws.

As the conditions of the water to be cooled are different, the TGA towers can be equipped with different types of filling:

Standard filling - TEVAFILM

Standard filling - TEVAFILM

The standard filling (TEVAFILM) is made with specially designed, vacuum formed PVC sheets duly glued together.

The particular configuration resulting is such as to optimize the turbulence of the air and water flows, increasing the evaporating effect, with a minimum air pressure drop. The fill sections have maximum dimensions of mm. 1200 x 300 x 300 which allows their easy handling and replacement.

The PVC material employee is self-extinguishing, completely free from any risk of corrosion or biological attack and keeps the requirements of Standard 136 of the CTI (Cooling Technology Institute) as much in mechanical properties as in flammability

The maximum hot water temperature for this type of filling is 50 ° C (Vicat softening point), tolerates temperature peaks up to 55 ºC (melting point).

Also are available filling films in polypropylene (PP) for cases with temperatures up to 80 º C.

Splash filling - TEVAPLASH

Splash filling - TEVAPLASH

For very dirty water and/or at high temperature, TGA towers can be equipped with a special splash filling (TEVAPLASH) with a high self-cleaning effect, which never gets clogged.

This sort of filling is made of small polypropylene plates set up one against the other and joined by a frame of the same material. Since these are pieces obtained by injection, they are 2-3 mm. thick which provides them a great mechanical resistance. The frame is assembled together in a mechanical way making up blocks of 600 x 300 x 300 mm.

The special layout of the plates, give to this sort of filling a high retention effect to water drops free fall end, subsequently, a longer time of contact between them and air flow.

External casing

With panels in think sheet steel, hot-dip galvanized of great thickness, assembled and sealed for water-tightness. It is complete with one or several access great doors that allow the access for inspection or maintenance of the internal elements.

External protection of all the external components by removing the oil and photosphatizing cycles applying an epoxy covering bottom and two coating of epoxy enamels, duly provided for the protection of equipment exposed to atmospheric contaminant.

Fan section

Made with panels in think sheet hot dip galvanized steel. It contains a tough structure in hot-dip galvanized after fabrication steel for the motor and fan support. The section fan is equipped with:

  • Axial fan (two from the model TGA 610) formed by adjustable pich blades with high efficiency airfoil profile in PPG and hub in cast aluminium.
  • Electric motor directly coupled to a axial fan is three phase and Q (IC418) type with cover in cast iron, inox screws, IPW55 (EN-60-034-5) protection and heating resistances to avoid condensations. Hermetic connections box transferred outside of the cooling towe fro an easy connection.
  • Removable fan guard. To protect each fan, made with frame and mesh in hot dip galvanized after fabrication steel.

Drift Eliminator

They are made of PVC sheet embossed vacuum profile especially designed to minimize drift of water with 4 changes of direction and a low pressure drop.Are reinforced with thicker sheets to form lightweight and rigid sections. The droplet separator consists of easily manageable sections. This water drift is less than 0.001% of the total flow of recirculating water.

For extreme temperatures, can be provided a special version (ABS) with overprice. Also available in polypropylene eliminators (PP).

Water distribution system

Formed by the main distribution header in hot-dip galvanized after fabrication steel with side headers in PVC (for high temperatures also available in PP). The nozzles, with large diameter hole to prevent clogging, are centrifugal type in rubber. All the nozzles can be very easily removed to be inspected.

Wet deck fill

In the cooling towers TGA series two filling types is available: film filling, standard supplied, or splash filling as alternative for very dirty water and/or at high temperature; both described in the filling types link. The filling is divided in blocks that allow the replacement through the door.

Water basin

Made with panels in think sheet hot dip galvanized steel, screwed (without welding), assembled and sealed for water-tightness. The basin is designed with slope to facilitate easy cleaning and complete drain.

The basin is equipped with:

  • Drain and overflow connections
  • Make-up water connection complete with float valve (standard version).
  • Air intake louvers, formed by PVC glued sheets and contained in stainless steel frames, with the triple function of avoiding the biological growth due to the sunlight, act as a filter avoiding air borne impurities and avoid the water splashes out.

Blend valve

In each one of the inlet connections water, to prevent salt concentration.

Catalogues

OPTIONAL SUPPLIES

Construction in stainless

Structure and sheet panels made by stainless steel AISI 304 and AISI 316L for food products sector.

Ladders and platforms

Made by steel sheets in hot dip galvanized. Tramex platforms, to acces to the top of the cooling tower in order to the fans and motors inspection.

Inverter control

For motors speed regulation, that substitutes the electric motors starter device and it provides a bigger energy saving. (See TEVACONTROL in accesory ans equipment section)

Electric water level control

Located in the basin remplacing the float valve. This system consists in an electric float switch, mounted in tight box on the wall of the basin and a solenoid valve installed at the makeup water connection. (See accessory equipment)

Electric heater

To prevent freezing in the basin, in the cold climates, with water-tightness connections box for work in the open air. Complete with control thermostat and electric minimum level control of water. (See accessory equipment)

Chemical water treatment equipment

For those cases in that the water quality makes it advisable. With reagents and biocide dosage  (TEVABIO & TEVACRUS), bleeder drain control (TEVAPURG) and shunt filter (TEVAFILT). (See accessory equipment)