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Products  |  Thermal Engineering and HVAC  |  Applied Thermodynamics  |  WL 320
WL 320 Wet Cooling Tower Show data sheet (pdf file) Print page
Technical Description

  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 stations.
  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.
  WL 320 examines 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.
  The cooling column is transparent allowing clear observation of the wet deck surface and the trickling water. Interchangeable cooling columns (WL 320.01 - WL 320.04) enable comparative studies.
    All important process parameters, such as the water flow rate, are recorded. The measured values can be read on digital displays. At the same time, the measured values can also be transmitted directly to a PC via USB. The data acquisition software is included. The changes of state of the air are represented in an h-x diagram.

  The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.
 

Learning Objectives / Experiments

- thermodynamic principles of the wet cooling tower
- measurement of the air flow, the temperatures of air

  and water, and the air humidity
- 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.
 
In conjunction with the cooling columns

WL 320.01-WL 320.04
- comparison of different wet deck surfaces

Features

* Principle and characteristic variables of a wet

  cooling tower with forced ventilation1
* Transparent, easily interchangeable cooling

  column with wet deck surface1
* 4 additional cooling columns available as accessory

Available accessories
WL 320.01 -- Cooling Column, Type 2
WL 320.02 -- Cooling Column, Type 3
WL 320.03 -- Cooling Column, Type 4
WL 320.04 -- Cooling Column, Type 5
Overview
WL 320 Wet Cooling Tower
Specification
[1] principle of a wet cooling tower with cooling column and forced ventilation
[2] interchangeable cooling columns with different wet deck surfaces available as accessories
[3] water circuit with pump, filter, valve and a nozzle as atomiser
[4] three-stage heater with thermostat for water heating
[5] radial fan for forced ventilation
[6] throttle valve to adjust the air flow
[7] demister unit at the outlet of the cooling columns minimises water loss
[8] tank for additional water compensates for water loss
[9] display of temperature, differential pressure, flow rate and humidity
[10] LabVIEW software for data acquisition via USB under Windows XP or Windows Vista
 
Technical Data
Cooling column
- specific surface of the wet deck surface: 110m/m
- cross-section: 150x150mm
Air flow measurement via orifice: D=80mm
Heater, adjustable in three stages: 0.5-1-1.5kW
Thermostat: switches off at 50C
Fan
- power consumption: 0,25kW
- max. differential pressure: 430Pa
- max. flow rate: 13m/min
Pump
- max. head: 7bar
- max. flow rate: 1,7L/min
Tank for additional water: 4,2L
 
Measuring ranges
- differential pressure (air): 0...1.000Pa
- flow rate (water): 12...360L/h
- temperature: 2x 0...50C, 3x 0...100C
- humidity: 10...100% r.h.
 
Dimensions and Weight
LxWxH: 1.110x470x1.230mm
Weight: approx. 115kg
Required for Operation
230V, 50/60Hz, 1 phase or 230V, 60Hz/CSA, 3 phases
Scope of Delivery

1 trainer

1 cooling column type 1

1 LabVIEW software CD + USB cable

1 set of instructional material

Order Details
060.32000  WL 320  Wet Cooling Tower
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