BUSINESS FIELD

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Cooling Tower

Concept of Cooling Tower

Industrial development and improved human well-being have led to significant energy consumption. Consequently, in order to remove generated heat and maintain an appropriate temperature, it is required to cool the remaining heat. Cooling requires a cooling medium. Therefore, cooling towers uses the most abundant water in nature, with the most efficient heat transfer method that is, evaporation to cool and recirculate the heated water using mechanical power. In other words, cooling towers are the ultimate heat outlet and the safest and most efficient heat exchanger.

Basic Principles of Cooling Towers

The fundamental principle of cooling towers is heat transfer based on latent and sensible heat of vaporization.
In other words, water evaporates, drawing latent heat of vaporization from its surroundings and cooling the surroundings. Air is cooled by sensible heat due to the temperature difference between water and air. The tower is designed to maximize the water's air retention time, maximize the contact surface area, and increase airflow to maximize contact between water and air, to cause high evaporation rates.

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Structure of Cooling Tower

TOWER STRUCTURE PART
(Above basin)
Cooling towers should be able to withstand dead loads and operating loads, and maintain their structural integrity even under diverse external atmospheric conditions and internal storms.
FAN PART
(Mechanical part)
Cooling towers are mechanical devices that increase and stabilize thermal performance (cooling efficiency) by introducing air into the tower and controlling the air flow rate.
FAN ASSEMBLY The fan is related to the efficiency and operating and maintenance costs of the cooling tower.
· PROPELLER FAN / BLOWER TYPE FAN
SPEED REDUCER This device reduces the motor's rotational speed to match the optimal rotational speed of the fan.
· Bevel gear Reducer Type / V-belt reducer Type
DRIVE SHAFT / COUPLING It is a device that transmits the rotational power between the motor and the reducer.
MOTOR This is a device to generate power to rotate the fan.
FAN STACK (CYLINDER) This device serves as a passage for the air inside the tower to flow smoothly and be discharged into the air.
OIL LINE (LUBRICANT) This is an oil injection device for the reducer.
Base This device supports the load and torsion of the drive unit and fix it to the cooling tower.
TOWER CASING PART Side of the cooling tower, excluding louvers.
WATER DISTRIBUTION PART This is a device which evenly distributes water to the nozzles.
NOZZLE It is a device that evenly distributes water onto the fill using pressure or gravity.
FILL PART This is the most important part of the cooling tower, where heat exchange between air and water is made and directly related to the efficiency of the cooling tower, and the size and power required for the cooling tower are determined depending on the thermal performance of the fill.
DRIFT ELIMINATOR PART This is a device which removes water droplets carried by the air flow and helps to evenly distribute the airflow.
LOUVER PART It is installed at the air intake point, ensures even air flow and removes droplets (flying dust).
COLD WATER BASIN It is located at the bottom of the cooling tower, collects cooling water and serves as a crucial foundation for the tower.

Classification of Cooling Towers

PRESENCE OF MECHANICAL DRIVE UNIT AND CLASSIFICATION BY VENTILATION METHOD ATMOSPHERIC COOLING TOWER BASIN
ATMOSPHERIC SPRAY TOWER
NATURAL DRAFT TYPE
NON-POWERED COOLING TOWER
MECHANICAL DRAFT TOWER FORCED DRAFT TYPE - COUNTER FLOW
INDUCED DRAFT TYPE - CROSS FLOW
CLASSIFICATION BY AIR AND WATER FLOW COUNTER FLOW COUNTER FLOW
CROSS FLOW SINGLE CROSS FLOW
DOUBLE CROSS FLOW
QUARTER CROSS FLOW
PARALLEL FLOW EJECTOR / ATMOSPHERIC SPRAY
CLASSIFICATION BY FILLER NON FILL TYPE A type without fill
SPLASH FILL TYPE Used when water quality is poor
FILM FILL TYPE Used when water quality is good and temperature is low
CLASSIFICATION BY HEAT TRANSFER METHOD OPEN TYPE EVAPORATIVE WET. DIRECT TYPE
CLOSED CIRCUIT TYPE EVAPORATIVE DRY TYPE
HYBRID TYPE SMOKE-PREVENTING, WATER-SAVING TYPE

Basic Terms for Cooling Tower

  • · WATER FLOW : WATER FLOW
  • · RANGE : Inlet water temperature - outlet water temperature
  • · APPROACH : Outlet water temperature – wet-bulb water temperature
  • · BLOW DOWN: Water discharged into the system
  • · MAKE UP WATER: Water that is added to supplement water lost through evaporation, scattering, windage, blow down, and leakage to the circulating water
  • · DRIFT: Circulating water lost from the tower as droplets contained in the exhaust air flow.
  • · Evaporation Loss: The amount of water lost when the circulating water evaporates into gas (steam) during the cooling process.