GT2025051403
Features:
Principle and characteristic variables of a wet cooling tower with forced ventilation.
Transparent, easily interchangeable cooling column with wet deck surface.
Wet cooling towers are a proven method of closed-circuit cooling and heat dissipation.
Typical areas of application are: air conditioning, heavy industry and power plants.
In wet cooling towers the water to be cooled is sprayed over a wet deck surface.
Water and air come into direct contact in the counterflow. The water is cooled by convection. Some of the water evaporates and the evaporation heat removed further cools down the water.
This item should examine the main components and principle of a wet cooling tower with forced ventilation.
Water is heated in a tank and transported by a pump to an atomiser. The atomiser sprays the water to be cooled over the wet deck
surface. The water trickles from the top to the bottom along the wet deck surface whilst air flows from the bottom to the top. The heat is transferred directly from the water to the air by convection and evaporation. The evaporated water volume is recorded. The air flow is generated by a fan and adjusted using a throttle valve.
 
Learning objectives/experiments:
Thermodynamic principles of the wet cooling tower.
Changes of state of the air in the h-x diagram.
Determination of the cooling capacity.
Energy balances.
Calculation of process parameters, such as maximum cooling distance, cooling zone width etc.
 
Specifications:
Principle of a wet cooling tower with cooling column and forced ventilation.
Interchangeable cooling columns with different wet deck surfaces available as accessories.
Water circuit with pump, filter, valve and a nozzle as atomiser.
Three-stage heater with thermostat for water heating.
Radial fan for forced ventilation.
Throttle valve to adjust the air flow.
Demister unit at the outlet of the cooling columns minimizes water loss.
Tank for additional water compensates for water loss.
Display of temperature, differential pressure, flow rate and humidity.
Software for data acquisition via USB under Windows 10.
Technical Data:
Cooling column:
specific surface of the wet deck surface: 57m2/m3.
cross-section: 150x150mm.
Volumetric air flow measurement via orifice: Ø 80mm.
Heater, adjustable in three stages:
500W.
1000W.
1500W.
Thermostat: switches off at 50°C.
Fan
Power consumption: 250W.
Max. pressure difference: 4,3mbar.
Max. volumetric flow rate: 13m3/min.
Pump
Max. head: 70m.
Max. flow rate: 100L/h.
Tank for additional water: 4,2L.
Measuring ranges
Differential pressure: 0-10mbar (air).
Flow rate: 12-360L/h (water).
Temperature: 2x 0-50°C, 3x 0-100°C.
Rel. humidity: 10-100%.
Power Supply: 230V, 50Hz/60Hz, 1 phase; 230V, 60Hz, 3 phases.
Dimension (LxWxH): Min. 1100x460x1220mm.
Weight: Approx. 120kg.

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