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Silencing TAG cooling towers serving an important italian hospitalSilencing TAS cooling towersParticular of TAS cooling tower bodyDistribution detail of TAS towersParticular of TAS towers removable panelFanParticular of stack with fanHigh efficiency spraying nozzlesScambond_Hyb treatmentTAS removable wallsTAS removable wallsTAG cooling towers with EU light basins for weight savingsSCAM-SHIELD systemCollecting basin coated in FRP

TECHNICAL SPECIFICATIONS OF COOLING TOWERS SERIES TAS/TASF

DESCRIPTION

The TAS/TASF series are dedicated to every industrial sector with a modular conception. These models are characterized by SCAM T.P.E. S.r.l. well defined standards and are supplied with a preassembled structure in hot galvanized steel according to EN ISO 1461 standards. The TAS/TASF series are equipped with sandwich insulated walls (22-26 mm thick) made of expanded polymer covered by an external FRP layer, which guarantees an excellent aesthetics and a higher durability.

The stacks and the collecting basin are protected with an hybrid treatment at high thickness (> 1000 gr/m2), effected on wrought carpentry SCAMBOND/HYB made up of a first galvanizing coat on blasted surfaces Sa3 ISO8501-1 plus a specific epoxy-polyamidic bi-component cycle and further applying on it another coat of aliphatic-polyurethanic bi-component type. For TASF series, on the basin internal surface, the SCAMBOND/HYB  cycle is replaced by the DURABOND/HYB coating, consisting of three fiberglass layers (on request) on the wrought and blasted sheet, which guarantees an excellent corrosion resistance over the time.                    

The TAS/TASF towers have dimensions compatible with road and ocean trasport. The ordinary maintenance and sometimes even the straordinary one is ensured by oversized ispection doors placed for every cell/fan unit. These models can be equipped with completely removable walls, for an immediate and easy inspection of the tower bodies. The fan units are planned for a long life and with components of utmost quality, with a very easy maintenance program.

The SCAMBOND/HYB protection system is among the most complete exterior protection cycle available on the market without having to pass to the stainless steel (which has, in any case, various limitations due to its metallurgy), developed during several decades of experience and many tests on field.

 

FAN UNIT

For TAS/TASF series of classic induced execution towers, the choice concerning the type of fan is almost obliged. The electric motor is placed inside the saturated air flow, the motor foreseen for utilization in saturated ambient is asynchronous three-phase TEFC with SKF bearings type 2RSC3, with watertight oiled, IP55 + SCAM T.P.E. S.r.l. specifications which ensure durability. On the same an axial fan in fiberglass or in aluminum alloy is placed through direct fit (lower investment and operating costs). Generally the direct transmission doesn’t foresee transmission or lubrication organs, even if it can be expected an indirect transmission on request.

Axial fans: With multiblade solution, have the function to ensure the cooling tower with the necessary air volume. The axial fan is placed on the cell high section (levelled with tower decking) and it is directly coupled on the motor drive shaft. The high efficiency blades are of asymmentric profile “NACA” aeronautic type, balanced with “PALA MASTER” system; all the blades are equipped with the adjustable incidence solution with still fan in order to better optimize the tower performances and the electric power consumption. The constituent materials are the galvanized steel or aluminum for the hub and the 6060T5 aluminum (or PPG/FRP) for the blades.     

Electric motors: are planned for severe conditions with continuous working type S1 asynchronous three-phase TEFC with SKF bearings type 2RSC3 with watertight oiled IP55 + SCAM T.P.E. S.r.l. specifications. They are placed inside the flow crossing the truncated cone stacks for a better fluo-dynamic distribution. The electric motors frames are designed to transfer the dynamic loads to the cooling tower structure, minimising vibrations and allowing an easy and intuitive maintenance. All the rotating parts outside the stack are protected against accidental interferences in accordance with the most updated safety standards.

Unexpected vibration switch: All the fan cells/groups  are equipped with a switch cutting the motors power in case of excessive vibrations and it is contained outside the fan duct.

 

STACKS

All the mechanical groups in each cooling tower cell has an high thickness steel stack with SCAMBOND/HYB protection. Each stack has a circular inlet junction and a pyramidal section. The outlet section is designed to reduce load losses and at the same time recover pressure obtaining an high efficiency of the axial fan. The stacks are fixed to the structure through dedicated bolts by securing them to the tower planking level.

 

WATER DISTRIBUTION SYSTEM

Inside the cooling tower upper section is placed the distribution system of “pressure” type. It is composed by a main channel connected to secondary ones whereon the spray nozzles are placed to ensure a water uniform distribution upon all the dispersion section.   

The a.m. nozzles are of Eco type. This innovative spray nozzle has been designed to reach the following main goals:  

  • - Large square water distribution (approximately 1 m2) in order to avoid any possible overlapping of the nozzles distribution on the same dispersion surface.
  • - Uniform hydraulic load in order to avoid any air bypass where the load is low and not equally supplied.
  • - Lower distance between nozzle and filling (600 mm) in order to reduce the pumping elevation.
  • - Low pressure of utilization in order to reduce the pumping elevation.
  • - Self cleaning surface by means of dedicated hydraulic impeller.   
  • - Anti clogging. 

 

COOLING TOWER STRUCTURE

The structure is characterized by hot galvanized steel profiles according to UNI EN ISO 1461 standards. Stainless steel bolts, lightness and main structure solidity are the main features. This structure typology envisages the utilization of lateral cover panels realized with insulated sandwich 22-26 mm, in polyurethane foam and FRP coating (with best insulation and acoustic qualities), or in alternative galvanized/painted steel coating (version ZN). The presence of not-welded fiberglass panels allows an easy extraordinary maintenance and the tower renewals, not only regarding functionality but also in terms of aesthetics, which inevitabily deteriorates over the years. The water collecting basin is supplied with a preassembled structure made up of protected panels in welded sheet: externally with our protective hybrid SCAMBOND/HYB cycle, meanwhile internally, only in TASF series, it is utilized the protective hybrid DURABOND/HYB/CCT-F cycle consisting of three fiberglass layers  moulded directly on internal surfaces.

The continuous improvement process of SCAM T.P.E. cooling towers led to the development of SCAM/SHIELD internal plastic coating, a thermoplastic sheet which covers the internal walls of the tower body, wrapping the dispersion elements and ensuring multiple benefits, such as:

  • - reduction of “by-pass on wall” phenomenon of the spray water with the consequent increase in the cooling efficiency of the tower;
  • - the elimination of possible water losses from the tower walls;
  • - the complete isolation of the hydraulic circuit from the contact with the galvanized steel structure of the tower.

In particular, the latter advantage along with the possibility to foresee the DURABOND/HYB protective cycle in basin (three layers of fiberglass to protect the metallic basin), make our towers comparable to the fiberglass ones, but we preserve the undeniable advantage of a robust and durable steel support structure.

 

SPECIAL EXECUTIONS

SCAM T.P.E. S.r.l. towers may be proposed with structure and paneling completely in stainless steel (304 or 316 according to the requirements)  where the project characteristics make  necessary to use highly corrosion resistant metallurgies.

 

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